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• Why is my Windows XP not allowing me to turn on sounds?

  - by Rookie

  This started to happen few weeks ago: Every time I start up Windows, the global sound volume is set to muted. I was able to just click the muted button to un-muted and that was fine, until now: Now I cant even click that unmute button! Every time I click the unmute button, I hear a split of a second the music I play, then it stops immediately. It is maybe 10 milliseconds until it mutes it again. In theory I could write a program to click that button continuously, but is there another solution to fix this? Or is this a broken hardware problem and Windows knows it and therefore doesn't allow me to enable sounds or my computer would break apart? Any ideas what could be causing this? A weird virus that's purpose is to piss me off? That weird this whole issue is, really, doesn't make any sense at all.

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• Hardware RAID 0 without OS re-installation

  - by sterz

  I have Ubuntu & Windows 7 installed on my hdd. Can I mirror the image of the hdd to the second identical drive? Is this not recommended (i.e have to re-install every OS)? If it is okay to mirror, is there anything else to do to make hw RAID 0 work? Does RAID 0 have the same risk as a single drive? What sector size would you recommend for read/write/extract video files (mostly each around 2 GB)?

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• further troubleshooting on a p8z77 motherboard

  - by Journeyman Geek

  I just bought a brand now asus p8z77 motherboard with a intel 3770. Its currently not booting - the system powers up for half a second and then powers down, and the CPU error light shines. I've tried switching ram between slots, switching PSUs, updating the bios (which can be done sans processor or ram on this model). Power: The 8 pin power connector is definitely in place correctly, and I've tried swapping PSUs between a new seasonic m12, and a known good cheapie PSU Ram: Ram is in the recommended slot for single stick operation, and tried swapping between the two sticks of DDR3 I have. Processor: Its installed correctly as far as I can tell, no obvious bent pins on the motherboard. At this point I'm guessing I'll need to RMA something. Are there any 'definitive' tests I can try, short of swapping CPU and motherboard that would let me know it is the CPU? Can I actually trust the error light on the motherboard?

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• IRC Services with failover support?

  - by insertjokehere

  I run a single server (call it 'server A') IRC 'network', and thank to the generosity of some friends, I have been given a second server ('server B') that I can run an IRCd on in order to provide redundancy in case server A crashes. This is fine, I can set up a round-robin DNS with the servers linked. The problem I have is what to do about services? Does anyone know of a way to get the services to 'fail over' in case of a server failure? Eg, Server A starts off running the services, but suddenly crashes. Server B detects this and starts its own copy of the services (ideally with the same configuration and data as the services on Server B) One solution that comes it mind is to write a bot that each server runs, that sit in a channel periodically checking if the bot from the other server is in the channel. If it is, then all is well. If not, then failover. I would prefer not to have to code this myself though We are currently using Unreal IRCd and Anope services on Linux

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• Wifi won't connect to certain networks

  - by Dave M G

  As I write this, I'm in a coffee shop on my laptop, and I am trying to connect to the free wifi network they offer. Every time I select their network from the wifi applet drop down menu, it connects for a second and then disconnects. At the same time, I have my Android phone with me, and it connects to the coffee shop's network without problem. There are a couple of people around me also using the same network with no issues. I asked the staff to check and as far as they can tell there is no problem with their router or anything. I have tried rebooting, but it has not made a difference. I have double and triple checked that I am using the correct WEP password. As an added wrinkle, when I connect to another network, it seems to connect (although I can't use them because they are paid gateway services). So I'm able to ask this question now because I have tethered my laptop to my phone, but it's slow and a workaround, not a solution. All indications are that it's a problem with my computer against this one network. Why would that be and how can I fix it?

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• What term is used to describe running frequent batch jobs to emulate near real time

  - by Steven Tolkin

  Suppose users of application A want to see the data updated by application B as frequently as possible. Unfortunately app A or app B cannot use message queues, and they cannot share a database. So app B writes a file, and a batch job periodically checks to see if the file is there, and if load loads it into app A. Is there a name for this concept? A very explicit and geeky description: "running very frequent batch jobs in a tight loop to emulate near real time". This concept is similar to "polling". However polling has the connotation of being very frequent, multiple times per second, whereas the most often you would run a batch job would be every few minutes. A related question -- what is the tightest loop that is reasonable. Is it 1 minute of 5 minutes or ...? Recall that the batch jobs are started by a batch job scheduler (e.g. Autosys, Control M, CA ESP, Spring Batch etc.) and so running a job too frequently would causes overhead and clutter.

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• Polling performance on shared host

  - by Azincourt

  I am planning on writing a small browser game. The webserver is a shared server, with no root / install possible. I want to use AJAX for client/server communication. There will be 12 players. So each player would be polling the server for the current game status every X milliseconds (let's say 200ms). So that would be 200ms x 12 players x 5 = 60 requests per second Can Apache handle those requests? What might be the bottlenecks when using this attempt?

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• Rebuilding RAID1 in Ubuntu

  - by John Utech

  I had my second HD in my RAID1 come up with bad sectors. So I got another drive and pulled out the bad sector drive and put the new drive in. With the original working RAID1 drive in the computer it failed to boot. I manually copied everything from the old drive over via a Gparted Live CD. Still no booting. Kind of scratching my head here as I can see that both of the drives have data on them but are unable to get either of them to boot. I used a Ubuntu live CD and couldn't even manually mount either of the drives, which I thought was really the odd part. Not sure where to go from here.

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• Cisco 2911 - problem with DHCP

  - by bluszcz

  Hi, i am configuring DHCP daemon on Cisco 2911. At some point i assigned address 192.168.50.50 to one box (using MAC address 'relation'). When I wanted to saved config - I got warning, that address 192.168.50.50 is already in Pool, which sounds bit weird - it was first host which I started configuring. I tried with following commands: clear ip dhcp server statistics clear ip dhcp conflict but first one doesn't output anything (and show statistics shows that there are 2 addresses in pool), and second one throws "there is no conflicted ips" message. How I can force/purge/clear/allow to bind 192.168.50.50 to this box?

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• Does Basic User Authentication require 2-Phase communiation?

  - by RED SOFT ADAIR-StefanWoe

  My Application connects to the Internet to HTTP Services using boost::asio. Recently we added support for HTTP Proxys and Basic User Authentication. We implemented Basic User Authentication by just sending Authentication parameters with every HTTP call if a user configured a proxy in our program. Parameters are sent as described here: Authorization: Basic <base64 Encoded username:password> This works at least for one user and his proxy server. Other users report that their Proxy server replys with 407 Proxy Authentication Required My guess is that some proxy servers accept 1 one phase authentication and that others don't. I do not find any information that a 2 Phase communication is requested where the access always is denied for the first call by returning 407 and that only a second call is accepted. Our program yet does not retry the call if a 407 has been returned. Do we have to add this? I asked this question before on stackoverflow but did not get a sufficient answer.

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• Ubuntu 14.04 stalling. Problem with LightDM. Plymouth (and logging out) switches over to a black screen w/ white cursor

  - by Kage

  if its a duplicate, sorry. Couldn't find anything that fits my issue, much less that was on 14.04. I changed a few things recently. Switched to the Numix theme (from PPA), installed lm-sensors and psensor (ran all the I/O probes), Ubuntu Tweak, Pinta, and well, Team Fortress 2 on Steam. :P The system will get to the Plymouth 'ubuntu' screen, load load, all dots filled, switches over to LightDM, but wait! No LightDM. :I Just a blank screen with that white cursor. Can't switch out to tty1-6 - not sure if the Ctrl-Alt-F1 is disabled in 14.04 or if its literally just locked down. If I change any files, I have access to the filesystem from my Windows 8 partition. That's it. :/ I'm pretty familiar with Linux, especially Ubuntu, but I think I'm still at the point I know just enough to break things and not always how to fix 'em. Any help would be greatly appreciated. Thanks! UPDATE I was just able to get into my desktop briefly. I booted Ubuntu. When the black screen froze, I hit Ctrl-Alt-Del. When it started switching off, I hit Ctrl-Alt-Backspace. It rebooted. I plugged the second monitor in I had been using before the issue ever came about. Plymouth displayed on both. LightDM came up, displayed on both (it used to show only the ubuntu logo on the unfocused monitor though). I logged in just fine. Even ran some pending software updates. I logged out of the desktop though, and LightDM refused to show again. xP

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• Sorting for 2D Drawing

  - by Nexian

  okie, looked through quite a few similar questions but still feel the need to ask mine specifically (I know, crazy). Anyhoo: I am drawing a game in 2D (isometric) My objects have their own arrays. (i.e. Tiles[], Objects[], Particles[], etc) I want to have a draw[] array to hold anything that will be drawn. Because it is 2D, I assume I must prioritise depth over any other sorting or things will look weird. My game is turn based so Tiles and Objects won't be changing position every frame. However, Particles probably will. So I am thinking I can populate the draw[] array (probably a vector?) with what is on-screen and have it add/remove object, tile & particle references when I pan the screen or when a tile or object is specifically moved. No idea how often I'm going to have to update for particles right now. I want to do this because my game may have many thousands of objects and I want to iterate through as few as possible when drawing. I plan to give each element a depth value to sort by. So, my questions: Does the above method sound like a good way to deal with the actual drawing? What is the most efficient way to sort a vector? Most of the time it wont require efficiency. But for panning the screen it will. And I imagine if I have many particles on screen moving across multiple tiles, it may happen quite often. For reference, my screen will be drawing about 2,800 objects at any one time. When panning, it will be adding/removing about ~200 elements every second, and each new element will need adding in the correct location based on depth.

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• Unable to start Ubuntu 12.04. The system is running in low-graphics

  - by kaleidoscpicsoul

  I am a newbie to Ubuntu. I installed Ubuntu 12.04 using a USB Stick and it was running all fine for a few weeks and this error popped up. According to one of my friend, the best way was to re-install Ubuntu. Being from a non unix background i thought the same too and after the second install it happened again, but only this time was much quicker, in 3 days. I don't want to re-install Ubuntu every time this happens. I am a complete newbie to Linux which means that i am really bad at using terminal. I know there are other people who fixed this issue using this very same forum, but unfortunately the answers provided are too complex for me to understand. Please let me know how to do this. Things I want to let you know: I would need help step by step if that is alright with you. After i get the error i get the options and i click exit to console login I get the following message in a black screen (which i think is a command line sort of thing): * Stopping save kernel messages [OK] apache2: Could not reliably determine the server's fully qualified domain name,using 127.0.1.1 for ServerName [OK] * Starting web server apache2 and a blinking cursor. So basically it looks like a dead end for my non unixy eye. And one final thing is before this issue had happened i had tried configuring Python to Apache2. For that i had uninstalled and installed LAMP server several time and edited the configuration files too. I don't know if this really is a concern, but I don't know.. I have a USB with Ubuntu 12.04 in it so i can install it anytime. (But i want to know what the issue is rather than running away) . I migrated to Ubuntu from Windows and i have no plans to go back. I think that's from my side. Please let me know if there are any questions.

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• Cannot login to fresh Kubuntu installation as admin, but only as guest

  - by Cedric Reichenbach

  I just installed a fresh Kubuntu 12.10 on a machine beside Windows 7. After successful installation, I rebooted and wanted to login. But when I type my password and hit Enter, some command line screen shows up for the split of a second and then it thows me back to the login screen without any error message. It's hard to spot what the command line text says, but I couldn't see any error or something like that. Anyway, when I log in as guest (without password), everything works finely. Also, when going to a system command line (using Ctrl+Alt+F1), I can login with my account without any problems. Does anyone have a clue what is going on and how to fix it?

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• Is there any kind of established architecture for browser based MMO games?

  - by black_puppydog

  I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that?

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• Okular (on Ubuntu 9.10) prints multiple pages per sheet (n-up) very small

  - by dgleich

  I'm trying to print a set of beamer slides with multiple slides per page (4-up or 6-up). When I select 4 pages or 6 pages per sheet in the Okular print dialog, the pages print quite small (perhaps even tiny -- about 1.75" by 1.25") and leave significant white-space on the page. I can get around this behavior by using the pdfnup utility (in the pdfjam package); which will correctly generate a 4- or 6-up pdf file but it's annoying to generate a second pdf file when I should be able to accomplish this task from the print dialog. Details: Ubuntu 9.10 (Karmic), 64-bit, Color Postscript printer.

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• Working with Active Directory and Windows Small Business Server 2008

  - by AreYouSerious

  I have to say that in most of my time as a network engineer I have had the opportunity to play with servers, but mostly it's been to put our management software on, and that was about it. I have been a Systems Network Engineer for about three months now, and as such I have been respnosible for the configuration of our test devices... this being said, I have had to start working through how to configure and apply such things as GPO through a new forest, domain and OU. This being said I have configured about three different GPO's and applied them to different locations. The first laptop that I brought into the domain took the default Domain group Policy... this was cool, I got excited... then When I tried to bring in the second Laptop, it didn't take the policy. I looked at the configuration, and the default domain policy was applied to domain computers, however since the laptop resides in the SBS Computers of the OU that was created, SBS created individual policies for XP and Vista for that OU, which I was unaware of. So the default policy for that ou overrode the domain policy and none of the options that were defined in the Domain policy were applied... this being said, I am now working on putting the default Domain as an applicable policy in the OU, thus I won't have to reconfigure another policy to mirror the Domain Policy... here goes nothing!!!.... More to follow Later.

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• Gave a talk at SoCal Code Camp at USC today titled “Linq to Objects A-Z”

  - by dotneteer

  I gave a talk at SoCal Code Camp on Linq to Objects. With careful categorization of Linq functions, I was able to cover the entire set of Linq functions in only 35 minutes. I was able to spend the rest time on demos. In my first demo, I show I was able to write a top 20 URL type of query using 4 lines of library code and 9 line of Linq code without tools like Log Parser. I also demonstrated that I only need to change 2 lines of code from querying a single log file to a whole directory of log files. It would be as simple to run the query against multiple servers in parallel. In my second demo, I discussed how to turn into graph depth-first-search (DFS) and breath-first-search (BFS) in the a Linq queryable problem. The class LingToGraph contains the only DFS and BFS code I ever have to write; the rest could be done the the lambda passed to the DFS or BFS calls. In future blogs, I will provide more details explanation of code. Links: Link to Powerpoint slides. Link to demos.

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• Remove Windows 7's limitation on number of concurrent tcp connections (http web requests)

  - by Ghita

  I have an application that tries to open as many http requests as possible (in order to stress test a proxy implementation) It seems to me that Win7 (SP1) may have a limitation on number of concurrent opened connection (it may be the so called half-open state if I'm not wrong). Is there something I can do for client ? and also I test using a vista PC that acts as a proxy server. It would be great if I could configure it to sustain at least 50 new connections initiated / second on client side and many more on server. I made the modification according to this technet article by setting TcpNumConnections = 150 but it doesn't make a difference. I still only see about 20 tcp sockets associated with my http client by using tcpview.

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• Wrong chrome full screen resolution with multiple displays

  - by Martin

  I am using Google Chrome on Windows 7 64bit with two displays. The displays have different resolutions and aspect-ratios. My problem is best visible when playing back full-screen videos from a flash player inside chrome (but it is not flash related). The maximum size is calculated from the primary displays' resolution, even when the relevant window is maximised on the second screen. The problem is also visible on websites that set the width to 100%. The 100% then apply to the primary display, even when the window is opened on the secondary display. Are there any known solutions to this problem? I am observing it since many Chrome versions, do not know if it has been ever correct.

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• What You Said: How Do You Browse Securely Away From Home?

  - by Jason Fitzpatrick

  Responses to this week’s Ask the Reader question show that just because you’re away from home doesn’t mean you have to give up the security and privacy that your home network provides. Earlier this week we asked you to share you browsing away from home security tips and tricks and obliged. JC offered one of the more entertaining tales of away-from-home browsing: Recently a bunch of us stayed at a high end resort down in Mexico. Internet was offered as a pay per device service at about $80/week/device. Considering we had about 12 wifi devices there among us(a few geeks), I decided to plan ahead. I setup a WRT54G as a WiFi client with a vpn back to my house and NAT. Setup a second one as a basic wireless access point with password and plugged it into the first. Onsite we setup the devices and connected to the wireless with one paid account(tied to the MAC address). Everyone connected to the other device for wireless access and it was all tunnelled through my home network with encryption. HTG Explains: Learn How Websites Are Tracking You Online Here’s How to Download Windows 8 Release Preview Right Now HTG Explains: Why Linux Doesn’t Need Defragmenting

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• Combine OS partion with data partition on NAS4Free/FreeNAS

  - by Pak

  I recently built a NAS4Free (formerly FreeNAS) machine using a 256MB (yes, MB) USB drive for the OS. When I did the original install, I had the bright idea of making the OS partition just big enough for the OS and a then creating a second partition using the remainder of the drive to store stuff pertaining to the OS. I never really found a use for the data partition and I ended up running out of space on the OS partition, so now I'd like to combine the partitions into a single partition. Is this something that is possible to do while everything is up and running? If it comes down to it, I can take down the machine and do a fresh install of the OS using the entire space of the USB drive, but I'd like to use this as an opportunity to better familiarize myself with FreeBSD/UNIX type systems. If this is possible, will it interfere with the NAS4Free things? The data partition shows up in the web interface under the disks section. If I end up manually changing the partitions, I'd be concerned with NAS4Free getting confused by the missing partition.

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• How to properly multi thread an RPG

  - by Nagrom_17

  I am working on an RPG type game in Java and I would like to know a few things relating to threading, What is the best way to implement a "wait for this then do this" without hanging the whole thread? Like waiting for a player to move to a location then pick up an item? or to wait one second then attack? Currently I am spawning new threads every time I need to wait for something, but that doesn't feel like the best solution. Any help is appreciated. EDIT: Clarification and an example of how I currently do things. User clicks on an item The function walkToAndPickUp(item) is called which is basically this: Make a new thread so we don't freeze the thread handling input while the player moves. Tell player to move to the item While the player is not at the item(The player moves through an update() function called in a different thread, I don't know how else to do it without freezing threads) Repeat until the player is at the item If the player is at the item then call delete item from map and add to inventory.

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• Moving FederatedEmail/SystemMailbox from One Store to Another - Exchange 2010

  - by ThaKidd

  Hello all. Just upgraded from Exchange 2003 to 2010. Somehow, I have two mailbox databases on my single Exchange 2010 server. One database contains all of the mailboxes I had moved from the 2003 exchange server; the other contains two SystemMailboxes and one FederatedEmail box. I am just starting to get a grasp on the commands used in the EMS. I was wondering if someone could point me in the right direction to move these three "system" mailboxes into my actual mailbox database so I can eliminate the second database. Just trying to sure up this one server before I role out my backup Exchange server. Thanks in advance! Your help and ideas are greatly appreciated as I try to make this setup as simple as possible.

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• Should I make my project free software?

  - by SkyDan

  The story Over the last couple month I have been working on a pretty big project. It's an enterprise-level software, I designed to be used at a local gym, but I believe it can be used in other places, where things like keeping track of clients, attendances, purchases and payments are required. The problem Well recently, I started to think on how to mature this project from being home-made. Not just because I want my project to grow but also because I would like to have some gain from it. The solutions? And here I saw 2 paths: License the software under some restricted license and try to sell the software to other business around. This way I can get some money for college (I am a high school junior right now) License the software under some free license, publish it on GitHub or something, and try to engage other developers to participate in the project. This way I get experience of working in a team and a better chance that the project will keep growing. The latter would be a good + for my resume, when I'll trying to find a job. So far both ways seem pretty exciting and beneficial to me. The first one offers a good college career, while the second one offers some additional experience and the project's growth. The questions Can anyone point to some other +/- of these 2 options? What would the better option in my situation and why? Or are there other options?

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