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• kde dropping keyboard

  - by shabbychef

  I am having problems with KDE 'dropping' my keyboard. It happens periodically when using my gentoo box directly, but has become much worse when accessing via NX (from a Mac laptop). Some possibly irrelevant clues: it appears to happen more often when the system is under higher CPU load the mouse continues to work, but no windows will accept any kind of keyboard focus. kwin will not accept tabbing between windows. when working on the machine directly, I can ctrl-alt-F1 to get to a shell (obviously this does nothing over NX). so I think it is KDE and not xorg. am running kwin-4.3.5-r1, and KDE-4.3.5 generally. this problem definitely appeared after upgrading to kde-4.x, but I do not remember if it appeared in kde-4.2. sometimes the keyboard will reappear, but sometimes I have to kill my kde session. playing with accessibility options or window-focus-stealing options in system-settings under kde will often make the keyboard responsive again, only to drop it perhaps minutes later. I had read online this might be an evdev problem under X (again, I think this is KDE, not X, but will try anything). as a result, I have fiddled with my xorg.conf endlessly. I even deleted it entirely and let nvidia-xconfig have a stab at it, with no luck I am tearing my hair out over this. I have done emerge -e xorg-server and am right now doing emerge -e kwin, to rebuild all packages that might be relevant. no luck with the xorg-server rebuild. any help appreciated. thanks,

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• Hung Java JVM failing to respond to kill -3

  - by Hans

  I have a Java VM that is hanging "randomly". I quote the randomly bit, because there is obviously a reason that the VM is hanging, but the hang does not occur periodically. We have the same software running in different customer environments and in those environments the JVM is not hanging. In the process of attempting to troubleshoot the hang the process exists with zero CPU utilization. I then attempt to execute kill -3 and the kill command hangs. No JVM Thread Dump is produced. I have spent time instrumenting the code to periodically log the thread stack traces hoping to catch the JVM in a state that would indicate where the issue lies, but so far this attempt has not born much fruit. Unfortunately I have not been able to reproduce this issue in my lab environment so I am limited by what can be done at the Customer site. The OS's in question are Red Hat Enterprise 5.4 and SUSE 10 running java version 1.6.0_05-b13 Has anyone had this problem? Any ideas on why kill -3 is failing to produce a Java Thread Dump? Thanks!

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• Why is my server performance degrading to the point of stopping, periodically?

  - by Pascal Aschwanden

  So, once in a while, I see in firebug that a request takes over 15 or even 60 seconds to respond and sometimes never. Here is what I've ruled out: It's not the CPU, cuz every time I check the Server load its less then 6 for all 3 numbers It's not the memory, because thats fairly low too, less the 50% It's not the I/O anymore, because I've seen the graphs that Joyent sent back to me when I requested them, and they show less then 3MB of I/O (mostly all read). It's not the SQL performance - I've profiled every last SQL command that runs, and they're all (99.9% of them anyway) running in less then 30ms, most run in less then 5ms. Oh and I've been profiling all the script execution times, and even the when the problem occurs, the script always manages to finish in 50ms or less (that's 1 / 20th of a second ). Now, I do run alot of ajax calls. 1 every 2 seconds per user and I have 300 DAU+. But, even if all 300 are playing simultaneously, thats still only 150 calls per second max. The only other thing I can think of is that one of my neighbors is funky. The problem is highly intermittent. 99% of the time it works perfectly and there's excellent performance. but 99%+ is not good enough. Eventually the performance gets so bad I have to restart the server, at which point everything is fine again. I've done this about 4 times now. Any ideas? Note: this is on joyent, vps, intro package 256mb of ram with bursting. here are the mysql dump info: Traffic ø per hour Received 18 MiB 29 MiB Sent 134 MiB 221 MiB Total 151 MiB 251 MiB Connections ø per hour % max. concurrent connections 5 --- --- Failed attempts 0 0.00 0.00% Aborted 0 0.00 0.00% Total 9,418 15.59 k 100.00%

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• Is there an application to log component temperatures to file?

  - by MrVimes

  I purchased a computer a month or two ago (core i7, 24gb ram, geforce gtx 590, windows 7 ultimate). Within the last week it began to bluescreen regularly. I tried lots of things (check hds, check memory, reinstall windows etc..) but it still bluescreened. At the time my temps were as follows... CPU - aprox 40/50c. GPU - arpox 60 idle, aprox 90 during heavy use. HDDs - aprox 55c after the PC had been on a while. I thought the 55c was ok, but I have since realized it was probably too high and may have been the direct cause of the bluescreening. I've installed a spare fan I had in the front of the PC blowing air in, (so there's airflow from front to back) Since then, obviously, all my temps are down. Especially the HDDs - three of them reach 30c and one has been up to 47c (it is some distance away from the airflow, in one of the 5.25inch drive bays) I haven't had the PC on for as long as it would normally take to bluescreen yet, but If it does I want to know what all the temps were right before the bluescreen. I have tried Everest but it only shows me realtime temps or gives me the ability to create one-off reports. I want something that can record all the temps to a file at 30 seconds intervals. If the computer bluescreens I can load it up again and check the last entry in the file. Side question: Am I right in thinking 55c was far too hot for a HDD? (It might have got higher than that before the bluescreens.. I don't know) Another side question: Is 47c too high? This is actually why I am asking the main question - I am concerned that this one drive that isn't getting the benefit of the extra fan may still cause the computer to bluescreen.

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• Toshiba A205-5804 freezes when plugged in

  - by heron

  Well I have a Toshiba A205-5804 and the problem is that the screen freezes anytime I plug the pc into the external power supply, not as most of the computers having the same issue, my computer DOES freeze in safe mode, and I really can't bear this problem for much longer... It's not an overheating problem, the computer is not getting hot or anything related, I've already tried changing the AC adapter, booting only with AC and no battery, and also all of these suggestions: Try changing the following setting in the bios setup, under the 'Advanced' tab Dynamic CPU Frequency: Mode = Always Low (NOT DYNAMIC) My laptop has been running on AC power without a problem for 24hours, including many restarts, and when I went back to the original bios setting, the problem returned almost straight away. EDIT Other suggestions I found on the web from here and here: Set the power plan to high performance Set the power plan to "Minimal Power Management" (1 and 2 do conflict) Start - Control Panel - Device Manager -- Processor - disable one of two processors - reboot normally 4.Do this: Only plug battery into laptop Turn on the laptop and start Windows normally Plug AC adapter into laptop, the screen will freeze Leave the laptop the way it is for 12-24 hours After 12-24 hours, turn it off the hard way Once it is turned off, turn it back on. The laptop is working now. I have no idea of what can it be...

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• Apache2: Limit simultaneous requests & throttle bandwidth per IP/client?

  - by xentek

  I want to limit simultaneous requests & throttle bandwidth per IP/Client on a single apache vhost. In other words, I want to ensure that this site, which hosts large media files, doesn't get hammered by someone trying to download everything all at once (just happened the other night). I'd like to limit the outgoing transfer speed overall for this site, as well as limit the number of connections a single IP can make to the server to a sane default (i.e. within normal browser limits for multiple requests so page loads aren't effected too much). Bonus points if I can actually scope it to file types (i.e. leave web files alone, but apply these rules to just the media files). We're running Ubuntu 9.04 on all the servers, and have two apache/php servers being load balanced via Round Robin by a squid proxy server. MySQL is running on its own box as well. We've got plenty of bandwidth to give them, so I don't really want overall caps, but just want to throttle the amount of memory/CPU it takes to serve this site. There other sites on these servers that we don't want to apply these rules too, just want to keep this one from hogging all the resources. Let me know if you need more info! Thanks in advance for your suggestions!

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• How to verify system using right GPU, after system reset [duplicate]

  - by Antoros

  This question already has an answer here: Is my mobile AMD card being used? 2 answers OS: Windows 8 CPU: Intel® Core™ i7 Processor 3635QM GPU 1 : Intel HD Graphics 4000 GPU 2 : AMD Radeon™ HD 8870M other info: System Spects Problem: im unsure that CCC is using AMD card instead of Intel's, i have encountered several issues since updating to 8.1 and i don't know what to do What happened: Installed 8.1 patch first day After 1 minute of use, BBSOD, windows never loaded again System restore wouldnt recognize 8.0 restore points i did a system reset to windows 8 since the laptop was only 3 weeks old System Broke, it did restore to factory BUT kept the registry almost intact, i had to install almost everything again, since the factory drivers where working with the updated one's registry and several problems CCC Broke too <- What i've already done Installing new drivers on top of old ones didnt work, so i used AMD uninstaller first Uninstalled and Re-installed Intel's HD Graphics Driver Tried to install mobile center, but AMD told me that it wasnt compatible (even if thats the only driver that they provide via their page as seen Here) Tried to use Auto-Detect, couldnt install driver because card was disabled because it didnt have the drivers... (see what they did here?) Had to use a workaround with Samsung Update, the driver didnt appear as download so had to use search and downloaded the driver manually. Now the graphic card appears on device manager and catalyst but as 8800 series (not exact model), and cant check the card with neither dxdiag/GPU-z/HWMonitor when right-clicking on CCC only Intel card appears launching a game and using as "high performance" would speed it up a little but i cant be sure How to verify its working properly? HWMonitor wont show AMD card even when set to high performance Latest GPU-Z wont work because a problem with Intel's, and legacy ones wont either what can I do now? I don't even know if I fixed my problem or not, and i also want to to use Adobe Premier with it, and its locked (the option to run it with the amd card not intels) Edit: now it seems to work, but cant change the setting for adobe Premiere and other programs that i Need to

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• Automatic o/s reset on a dedicated internet browsing Windows 7 pc.

  - by camelCase

  I have just purchased a new Acer Revo nettop PC for dedicated internet browsing. It will be the only pc on a home network. My original plan was to install one virtual PC for family browsing, another for remote web based server administration and ban browser use from the host Windows 7 o/s. The idea was that I could recover to a fresh VHD image once a week to eliminate any build up of malware inside the browser VMs. However now I am looking for alternative solutions since the Intel Atom cpu does not have hardware VT support which Windows Virtual PC requires. Would it be possible to engineer some type of routine overnight host o/s wipe and recovery? I guess cyber cafes do something like this? The only user data that would need to be retained across a recovery would be browser bookmarks but these could be exported to remote service. Edit 1: I am thinking the o/s reset could be done via some disk image recovery process. Edit 2: Just had a brainwave. Routine browsing could be done via the new Google Chrome O/S. I have just seen a video of the Google Chrome o/s booting off a usb pen drive in seconds.

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• pfsense 2.0 traffic priority - set full priority for single host

  - by Waxhead

  I have a network with several computers all on the same network and since I have very limited bandwidth I would like to prioritize traffic almost like a CPU scheduler prioritize processes. Example: Computer A: Used for webstuff: YouTube, downloads, news, emails etc. Computer B: Transferring files over HTTP Computer C: Transferring files over ftp, rsync whatever What I would like to do is to give A up to for example 90% of the available bandwidth IF A requires it. The leftovers (10%) is divided between B and C (5% each if both is busy) If A is not utilizing all bandwidth then of course B and C should share the full bandwidth (50% each as long as both are maxing out their bandwidth). All computers are on the same network (192.168.1.0 - 192.168.1-10 for example). Appreciate if anyone could shed some light on how I should set up my network to achieve this. To be honest I actually need a step by step guide on how I should set this up. Network setup: (ADSL modem configured in bridge mode (1500kbps/300kbps)) [ADSL modem (bridge)]<-[pfsense2.0]<-[switch]<-[Computer A,B,C...etc]

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• Load is 0, yet site crawls (sometimes). What gives?

  - by Yegor

  I have a ~1.5-2mil page views per day site running on 2 servers. One for mysql, other for everything else. Mysql box has a load of 3, frontend is usually 0.0-0.1. Both are dual quad core with 8GB ram running SAS drives in raid5. CPU is idle for majority of the time, iowait is non-existent. Im running nginx, memcache, and site is built on php. Half the time everything runs perfect, while at other times it lags something severe, when it takes 10-15 seconds for a page to load. Page execution time is always super low, but it seems to hang, waiting for something before it actually loads the page. Whats even more weird is that it only happens to 1 file on the site (but its the one thats most commonly accessed, that actually loads the content on the site). Other pages are super fast at all times, even when it takes 15 seconds to load actual content. I have nginx_stats plugin installed, and if I monitor it, the lag spikes happen when the write column starts going above 100, and it frequently does... all the way to 500-1000. It does so at totally random times... not when traffic is heavy... it can do this in the middle of the night, and work perfectly at 5pm when traffic is at its highest. Any ideas?

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• Why is only one Excel spreadsheet crippled, but others are fine?

  - by Dallas

  I have an inherited spreadsheet that I really don't want to rebuild at the moment. It's a simple small workbook that is small (< 200 rows that don't even reach to AA) and does nothing more than calculate some totals within the same worksheets. No macros, no external data sources, nothing beyond basic formatting of dates, numbers and strings. I see importing data from CSV/text has created many many workbook connections over time, but even if I delete them all (there were hundreds) it makes no difference in performance. Even clicking to simply change focus from cell to cell takes 10+ seconds, adorned by the spinning cursor and (Not Responding) appending to the title bar and the application locking up. The program seems to "recover" every time, but efficiency of editing this file is obviously seriously handicapped. All other files seem fine in Excel, and other programs have no apparent performance issues. I see Excel is chewing up CPU but I'm not sure how to narrow down what process or service is "clashing" with Excel. I tried the same file on other computers and performance is fine. If I turn off all start-up services and run only Excel, performance is restored... until I start using other programs and then it bogs down again. At this point, I would entertain almost any idea, theory or suggestion that helps pinpoint, solve or work around the issue.

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• sysbench memory test on ec2 small instance

  - by caribio

  I'm seeing a problem with sysbench memory test (the default version that's compiled in). This is on Ubuntu Maverick, sysbench installed via apt-get install sysbench. Running the same thing on Ubuntu @ Rackspace worked just as expected. While the CPU and I/O tests worked fine on EC2 servers, the memory test just runs without doing anything (notice the 0M in the test results). The instance used was the publicly available 'stock' Ubuntu image with no changes to it: ./ec2-run-instances ami-ccf405a5 --instance-type m1.small --region us-east-1 --key mykey Supplying more arguments (such as: --memory-block-size=1K --memory-total-size=102400M) didn't help. What am I doing wrong? Thanks. sysbench --num-threads=4 --test=memory run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 4 Doing memory operations speed test Memory block size: 1K Memory transfer size: 0M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 0 ( 0.00 ops/sec) 0.00 MB transferred (0.00 MB/sec) Test execution summary: total time: 0.0003s total number of events: 0 total time taken by event execution: 0.0000 per-request statistics: min: 18446744073709.55ms avg: 0.00ms max: 0.00ms Threads fairness: events (avg/stddev): 0.0000/0.00 execution time (avg/stddev): 0.0000/0.00

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• Small maximum number of connections on a Linux router

  - by Eugene

  I have a Linux box acting as a router with no iptables or other firewall and no networking applications running on it, just pure router. I've put it in a test environment that generates many TCP connections, each having unique source and destination IP, and those connections go through this router. I'm observing that number of connections successfully created rise to approximately 500 and then no more connections can be created for several minutes, then another 100 connections can be created and there is another pause, and so on. If 10 connections for each source-destination pair are created, then maximum numbers go about 10 times up, so the problem is probably with many connections from different IPs. As traffic is simply routed, it doesn't have to do with number of file descriptors, iptables connection tracking and other things often proposed to check in similar cases. The box has plenty of free RAM and CPU, both NICs are gigabit. The kernel is 2.6.32. I've already tried increasing net.core.*mem_max, net.core.netdev_max_backlog and txqueuelen on both NICs, with completely no effect. What else should I check ? Is there some rate-limit in the kernel itself ?

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• Decrease in disk performance after partitioning and encryption, is this much of a drop normal?

  - by Biohazard

  I have a server that I only have remote access to. Earlier in the week I repartitioned the 2 disk raid as follows: Filesystem Size Used Avail Use% Mounted on /dev/mapper/sda1_crypt 363G 1.8G 343G 1% / tmpfs 2.0G 0 2.0G 0% /lib/init/rw udev 2.0G 140K 2.0G 1% /dev tmpfs 2.0G 0 2.0G 0% /dev/shm /dev/sda5 461M 26M 412M 6% /boot /dev/sda7 179G 8.6G 162G 6% /data The raid consists of 2 x 300gb SAS 15k disks. Prior to the changes I made, it was being used as a single unencrypted root parition and hdparm -t /dev/sda was giving readings around 240mb/s, which I still get if I do it now: /dev/sda: Timing buffered disk reads: 730 MB in 3.00 seconds = 243.06 MB/sec Since the repartition and encryption, I get the following on the separate partitions: Unencrypted /dev/sda7: /dev/sda7: Timing buffered disk reads: 540 MB in 3.00 seconds = 179.78 MB/sec Unencrypted /dev/sda5: /dev/sda5: Timing buffered disk reads: 476 MB in 2.55 seconds = 186.86 MB/sec Encrypted /dev/mapper/sda1_crypt: /dev/mapper/sda1_crypt: Timing buffered disk reads: 150 MB in 3.03 seconds = 49.54 MB/sec I expected a drop in performance on the encrypted partition, but not that much, but I didn't expect I would get a drop in performance on the other partitions at all. The other hardware in the server is: 2 x Quad Core Intel(R) Xeon(R) CPU E5405 @ 2.00GHz and 4gb RAM $ cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 32 Lun: 00 Vendor: DP Model: BACKPLANE Rev: 1.05 Type: Enclosure ANSI SCSI revision: 05 Host: scsi0 Channel: 02 Id: 00 Lun: 00 Vendor: DELL Model: PERC 6/i Rev: 1.11 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: HL-DT-ST Model: CD-ROM GCR-8240N Rev: 1.10 Type: CD-ROM ANSI SCSI revision: 05 I'm guessing this means the server has a PERC 6/i RAID controller? The encryption was done with default settings during debian 6 installation. I can't recall the exact specifics and am not sure how I go about finding them? Thanks

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• System randomly freezes yet mouse still moves, SSD out of reallocatable sectors, should I replace it?

  - by user784446

  This problem has lasted for the past 48 hours. The first time it happened, a program I was running stopped responding, so I tried to end it from task manager. The processes at first were listed fine until hovered upon. Eventually, despite the mouse still being able to move, after a few persisting clicks the mouse finally stopped moving. The screen went blank shortly thereafter. The second time it occurred, items on the screen stopped responding - hovering over the taskbar or such wouldn't elicit a response. Sound would still play however. Eventually, the mouse became unresponsive and the system restarted itself. I suspect that it may be a problem of my SSD drive. After looking through some Google search results, I downloaded HDTunePro to determine if there's a problem with the drive. Results returned a problem of reallocated sector count. An error scan also revealed 48 bad sectors. Also, an attempt to backup the contents of the most important areas of the drive returned a few explorer "Error: cannot read source from disk" errors. Should I ditch the drive and use another drive or is there anything that can be done to repair the drive? SSD: OCZ Petrol 64gb CPU: AMD Athlon II X4 640 RAM: Generic 3GB DDR2 Motherboard: Gigabyte MA74GM-S2H OS: Windows 7 Ultimate x64 Thanks!

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• What can I do with a home server?

  - by Joel Coehoorn

  I have an old 700 Mhz Pentium III at home running Windows 2000 Server, with a home router set up to pass incoming requests to it and a DynDNS account set up so it's easy to find. Right now I'm using it for a number of things: Shared folders + backup inside the home network Shared Printer inside the home network Domain Controller, just because I feel like it and because it's useful to me as practice to keep those "enterprise" administration skills. Web Server FTP remote access for my files. I abandoned this for security reasons, but it's still worth leaving visible. Remote Desktop in to the home network (thinking about adding VPN service) SVN repository MySQL - Will be moving to SQL Server 2008 Standard soon. After I upgrade my wife's laptop from home to pro later this year it will also become a domain controller It's the only place I still have access to Internet Explorer 6 any more without setting up a new virtual machine, so I use it for testing code with that browser. The question is: What else could I be doing with this machine? Update Additional ideas based on the suggestions: Media Server/DVR Build server PBX SSH Proxy Server Continuous Integration Server Personal OpenID Provider Update2 Just a note that this server was recently upgraded to an Atom330 with 2 GB ram and bigger hard drive. For all that's slow for a "modern" cpu, it should still be much faster than the old Pentium III and the expected power savings should make the upgrade essentially free over the course of the next year or two. Also, it's now running Windows Server 2008.

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• Doesn't VirtualBox 4.0 support drag-drop file copy yet?

  - by Benjamin

  Version 4.0.0 will be new major release. The following major new features were added: -New settings/disk file layout for VM portability; see the manual for more information. -Open Virtualization Format Archive (OVA) support; see the manual for more information. -VMM: support more than 1.5/2 GB guest RAM on 32-bit hosts -Language bindings: uniform Java bindings for both local (COM/XPCOM) and remote (SOAP) -invocation APIs -Chipset: added support for the Intel ICH9 chipset with 3 PCI buses, PCI express and -Message Signaled Interrupts (MSI) -Audio: Intel HD Audio is now available as guest hardware, for better support with modern -guest operating systems (e.g. 64-bit Windows; bug #2785). -GUI: redesigned user interface with guest window preview -GUI: new display mode with downscaled guest display -Resource control: added support for limiting a VM's CPU time and IO bandwidth. -Storage: support asynchronous I/O for iSCSI, VMDK, VHD and Parallels images -Storage: support for resizing VDI and VHD images -Windows Additions: support for automatically updating the Guest Additions (requires -installed Windows Guest Additions 4.0 or later) -Guest Additions: support for copying files into the guest file system What does the last line mean? I thought this is a drag-drop file copy feature like VMWare. I tried that. But I couldn't copy by drag-drop, ctrl-c ctrl-v either. Edit: I mean VBox 4.0 beta, not 3.x The release note is here. Download link is here.

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• Servers/Websites Keep Going Down

  - by Tyler Johnson

  Okay, I'm a noobie. I know how to build and compose a website, but I have no idea what I'm doing when it comes to servers and server commands, etc. I've recently had a problem with all of my sites on our servers going down all at once and then I have to go in and reboot the server for them to come up again. At first this was annoying, but now it is becoming agonizing as it now takes 3-4 reboots for the websites to come back up. I contacted support for my hosting, but they are not being very helpful. They just keep telling me what the issue might be and basically telling me that I'm going to have to look into it and figure it out, which really isn't possible since I know nothing. Anyway, here are the things they said were possible reasons: They said I have "strange logs" in my Apache webserver log, error: sh: fetch: command not found. My php.ini memory limit is: 256M which is very high. It should be 32M or 64M. Server is reaching Max Clients, meaning we have more than 150 visitors at a time. (They supposedly "fixed" this, but the sites/server are still going down) I have some Wordpress sites with plugins getting errors like: PHP Warning: pack(): Type H: illegal hex digit G in... PHP Fatal error: Cannot use object of type stdClass as array in... PHP Fatal error: Maximum execution time of 30 seconds exceeded in... PHP Fatal error: Call to undefined function file_exists() in... PHP Parse error: syntax error, unexpected '<' I know that's a lot, but I really am at wits end and have no idea what to do now. If anyone could maybe give me some advice or point me in the right direction I would greatly appreciate it! Thanks! Oh, and here are the specs for my server: RAM: 2048MB CPU Shares: 40 Primary Disk: 50GB Data Transfer: 75GB Port Speed: 5Mbps Type: Linux

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• Rendering a frame is producing noise from speakers in Windows and Linux

  - by Robber

  When any hardware accelerated application is rendering a frame (or many of them) a very short noise is coming from my speakers. This can be a game, a WebGL application or XBMC. When the application/game is rendering many frames per second (like most of them do) the noise is a continuous buzzing that gets higher pitched with higher framerates. This applies to Linux and Windows, so I'd assume it's a hardware problem. The current hardware in the PC is: CPU: Core2Quad Q9550 GPU: Radeon HD 5770 RAM: 2x2GB DDR2 Motherboard: Asus P5QLD PRO PSU: be quiet! Pure Power 530W Screen and speakers: Old 720p LCD TV connected via VGA and aux cable Muting the TV stops the noise, muting Windows doesn't. I tried replacing the PSU first (used a Tagan 700W PSU before) because I thought it was a power problem. It wasn't. I tried replacing the motherboard (used a ASUS P5B SE before) next because I thought it was a sound card problem. It wasn't. I tried the GPU in a different PC because I thought it was a broken graphics card. It worked perfectly fine in the other PC. I thought it might be interference, but moving the audio cable around changes absolutely nothing. I tried using an HDMI cable instead and that did work, but is not an option since my TV has only one HDMI input and I need that for my PS3.

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• How to reduce celeryd memory consumption?

  - by Gringo Suave

  I'm using celery 2.5.1 with django on a micro ec2 instance with 613mb memory and as such have to keep memory consumption down. Currently I'm using it only for the scheduler "celery beat" as a web interface to cron, though I hope to use it for more in the future. I've noticed it is the biggest consumer of memory on my micro machine even though I have configured the number of workers to one. I don't have many other options set in settings.py: import djcelery djcelery.setup_loader() BROKER_BACKEND = 'djkombu.transport.DatabaseTransport' CELERYBEAT_SCHEDULER = 'djcelery.schedulers.DatabaseScheduler' CELERY_RESULT_BACKEND = 'database' BROKER_POOL_LIMIT = 2 CELERYD_CONCURRENCY = 1 CELERY_DISABLE_RATE_LIMITS = True CELERYD_MAX_TASKS_PER_CHILD = 20 CELERYD_SOFT_TASK_TIME_LIMIT = 5 * 60 CELERYD_TASK_TIME_LIMIT = 6 * 60 Here's the details via top: PID USER NI CPU% VIRT SHR RES MEM% Command 1065 wuser 10 0.0 283M 4548 85m 14.3 python manage_prod.py celeryd --beat 1025 wuser 10 1.0 577M 6368 67m 11.2 python manage_prod.py celeryd --beat 1071 wuser 10 0.0 578M 2384 62m 10.6 python manage_prod.py celeryd --beat That's about 214mb of memory (and not much shared) to run a cron job occasionally. Have I done anything wrong, or can this be reduced about ten-fold somehow? ;) Update: here's my upstart config: description "Celery Daemon" start on (net-device-up and local-filesystems) stop on runlevel [016] nice 10 respawn respawn limit 5 10 chdir /home/wuser/wuser/ env CELERYD_OPTS=--concurrency=1 exec sudo -u wuser -H /usr/bin/python manage_prod.py celeryd --beat --concurrency=1 --loglevel info --logfile /var/tmp/celeryd.log Update 2: I notice there is one root process, one user child process, and two grandchildren from that. So I think it isn't a matter of duplicate startup. root 34580 1556 sudo -u wuser -H /usr/bin/python manage_prod.py celeryd wuser 577M 67548 +- python manage_prod.py celeryd --beat --concurrency=1 wuser 578M 63784 +- python manage_prod.py celeryd --beat --concurrency=1 wuser 271M 76260 +- python manage_prod.py celeryd --beat --concurrency=1

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• Ubuntu 12.04 Very slow especially with Android Studio

  - by Nada

  I have an old laptop with the following specification: Memory: 485 MiB, Processor: Genuine intel CPU T2300 @ 1.66 GHz ×2, OS Type: 32 bit, Disk: 78.1 GB, I installed on it Ubuntu 12.04 LTS and I noticed that the overall system is very slow in responding. I tried to search about that in the internet and I found some articles talking about how to make Ubuntu 12.04 LTS run fast I applied all what they said including download LXDE desktop environment and then nothing different in the system response time. Then I need to develop some android applications so, I download Android Studio (Beta) 0.8.6. The problem became worse than before whenever I tried to open the Android Studio the screen is frozen for some minutes then it took time to download the projects and initialize the work space also, when I tried to move the cursor he is move very slowly. When I tried to run my first application on the AVD it took three hours and still not run yet. I delete the Android Studio and install it again several times, I was trying to solve the problem but still nothing change. Please if you have any suggestions that may help me make my laptop and Android Studio work faster I will appreciate it for you. Thank you in advance.

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• ASP.Net Session Timing Out Rapidly

  - by Zac

  We have an ASP.Net 3.5 website running on Windows Server 2008 with IIS7. The session timeout period for this site is configured to be 20 minutes - however, it is currently lasting for between 40 and 50 seconds. After researching the problem we investigated several configuration values which could be involved in the timeout period but none of them are set to less than 20 minutes. The areas we look are as follows: web.config system.web/sessionState element (20 minutes). web.config system.web/authentication/forms element (not present, defaults to 30 minutes). Sites/{website}/ASP/Session Properties/Time-out (20 minutes). Application Pools/{appPool}/Advanced Settings/Process Model/Idle Time-out (20 minutes). We've also noted that the CPU is staying around 0% and that RAM usage is flat-lining around 1.07 GB (of 8 GB available) - so there is no performance-based reason for IIS to be recycling the Application Pool as far as we can tell. Are there any settings we've overlooked which could cause the session timeouts to be expiring so quickly? EDIT A couple of additional points: This is not occurring in development, only on the server. The session is not sliding (i.e. if we refresh the page a few times it still times out approximately 40 - 50 seconds after the session was created.

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• Computer randomly shuts itself off

  - by Decency

  I have not been able to determine a pattern for why this happens, despite my best efforts. I've attempted to run it on full power with Prime95 and this doesn't trigger a restart. Generally the restarts occur while I'm playing games, watching videos, or even just having multiple tabs open in a browser. However, I often play processor intense games for hours without any restarts occurring, and sometimes they'll happen 3-4 times in an hour during less intense activity, so I don't think that is the problem. I imagine it has something to do with overheating or power consumption so I've been monitoring CPU temperature and cleaning with compressed air, but the problem keeps happening. I don't know how to track power consumption, and assume that this is the problem. Whenever this occurs, the sound gets stuck in a short loop of whatever was playing at the time, though restarts also occur when nothing is playing. Here is a screenshot of temperatures: and under load: Here's the parts list: http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=10546754 As shown in the list, the case includes a 585W Power Supply, which I've been told should be plenty. I built the computer myself with a friend's guidance but it's very possible I did something wrong. Right now I'm looking into ensuring that I have the latest drivers for all components. Any help would be appreciated- thanks.

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• Is it possible to record a screen-video from a VNC server?

  - by nikie

  I have a computer that's running VNC server. I would like to record a video of what's going on on this computer, if possible without installing additional software on that computer. Is there a program that can connect to the VNC server port and instead of displaying the screen save it to an (e.g. AVI) video file? Background: One of our customers sometimes has problems with the software he bought from us when he's performing a complex procedure. To help him, we offered that someone (a service technician or programmer) watches what he's doing during that procedure to find out if he's doing something wrong or if there's a bug in the software. Currently, this is done live via VNC. That has a few disadvantages: The service technician has to be in the office at the time. As the customers are in different time zones, that can be in the middle of the night. If the service technician forgets something or doesn't notice something, it's lost. There's no way to see what happened again. Only a single computer can be watched by one service technician at a time. I know I could install normal screen-grab software on the computer, but we're talking about an embedded system with limited RAM, CPU, HDD space, so installing something new is not an easy decision. And VNC is already there. I could of course open a VNC client on some office PC and capture that PC's screen, but I can only record one remote computer that way. I often have to watch up to 8 screens in parallel. (And I don't think that screen-grabbing VNC would improve image quality, either.)

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• AA doesn't work due to monitor?

  - by MikeQ

  I have a monitor (with TV tuner - Philips 221T1SB), native resolution of 1920x1080, but there is an Overscan in Catalyst. It says from left to right '10%' and '0%', if i set it (all the way to the left) on 10%, i get screen with black borders (you know what i mean), but if i set it to 0%, i get a filled monitor. It does make sense, but why the hell is there such an option? I never had any AA issues before, but now, with this monitor, here they go. I can't find any solution, i have only one lead = overscan, or pretty much anything with the CCC settings. Yes, i almost forgot. After a bit of trying to configure the monitor with remote, i found there is a PC channel option, few other channels, and then a HDMI option. I have monitor through HDMI, but why i get black screen when i select the PC channel? That might be another problem. I tried almost everything. Please guys, give me a hand. I don't want jaggies! CPU: Intel I5-750 @4,0GHz RAM: Corsair Vengeance 8GB 1600MHz GPU: AMD Gigabyte HD 7950 Windforce @1100/1400, 1,174V Motherboard: ASUS P7P55D-E EVO

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