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• Macs don't connect to wifi access point but PCs will

  - by Josh

  So, as a side project I'm going to try and figure out why the wifi APs in my building exhibit the following behavior: - They typically allow all types of computers to connect without issues - Sometimes Apples can't get an IP address but will still connect to the AP's signal - Less often, PCs can't connect to the wifi (same as above - yes signal, no IP addy) - Don't let Raiders fans on no matter the time of day! My first thought was that the DHCP leases were all taken up when the Apples would try to connect, and it was just their unlucky timing, but I would then try to log on with a PC that had a new, unleased MAC address and it would work... Could this be something to do with interoperability between an apple wifi card, and the APs? Different parts of the DHCP lease being taken up first? The fact that the Seattle Mariners might actually be good this year?? If this hasn't used up everyone's patience (with my crappy sports jokes), something else I could use some help with: - We don't have the model or type of AP - This is because there is no documentation available for them, and they literally look like small white boxes with no writing on them. Also, the company that installed them is out of business, so the situation might be that no docs will ever be on the way. -- Do you guys have any ideas on how to figure out what we have? Thanks as always for all the help, and I'm looking forward to the day when I know enough to start contributing back to the site, Josh

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• Edit-text-files-over-SSH using a local text editor

  - by Mikko Ohtamaa

  I am working in various Linux and UNIX environments. I'd like to elegantly solve the problem of editing remote configuration files over SSH. Instead of using terminal editors (nano), I'd like to open the file in a local text editor on my desktop (Sublime Text 2). CyberDuck, WinSCP and various other SFTP apps can do this. Using editors over X11 forwarding has also proven to be problematic. Also using archaic text editors like Vim or Emacs do not serve my needs well. They could do this, but I prefer using other text editing software. Using ssh mounts (FUSE) are also problematic unless they can happen on the demand and triggered by the remote site. So what I hope to achieve Have a somekind of easily deployable shell script etc. which I can copy to remote server (let's call it mooedit) I run mooedit command on the remote server of which I have connected over SSH connection mooedit sends some kind of signal (over SSH( to my local desktop On my local desktop this signal is captured and it determines 'a ha! moo wants to edit a file on server X in folder Y' File is SFTP transfered to the local desktop (/tmp) File is opened in a nice GUI text editor on the local desktop When Save is pressed, the local desktop notices changes in the file and SFTP sends the resulting file back to the server The question is: What signaling mechanisms SSH provides for this? Any other methods to trigger a local text editor for remote SSH file?

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• Windows 7 blank dvi screen

  - by user99

  I've just upgraded to Windows 7 Ultimate 64 bit. I had an issue during installation; after setup rebooted instead of going to the 'Completing installation' screen I just got a blank screen. I eventually(!) figured out that this meant 'un-plug your second monitor to proceed'. When I did this, installation completed in a snap and everything runs fine. However, whenever I plug my second monitor into my PC, it gets no signal, the the primary monitor removes all windows. icons, the taskbar and the cursor just shows the desktop wallpaper. I'm running a GTS8800 512mb, with the latest drivers (197 IIRC). The monitors are identical, and both plug into DVI sockets on the graphics card, the only difference is I connect one using a straight DVI cable and the other using a VGA cable and a VGA-DVI converter. It's the DVI cabled one that has the issues (if I plug it in by itself it gets no signal). Everything was working fine before I upgraded to Windows 7 (I used to run XPSP2). Anyone have any ideas?

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• Error - "IR Hardware not detected" - but it's installed/working

  - by Robert

  I am trying to do: Settings-TV-Set up TV signal. During this process I am getting the error "IR Hardware not detected." With the remote, I can select the "try again" button (to re-detect) and it tries again, so the remote works. Plugging in the "IR blaster" doesn't change anything. (I wouldn't expect any difference, but I read a post which said you needed that. I will get Media Center to change channels if I can get that working - but first things first.) I was able to do the setup months ago when I had cable. and everything was fine. I just got DirecTV. (BTW - During the above process, Media Center detects the signal coming in on channel 3. Windows XP Media Center SP3. The TV Tuner card is a Pinnacle TCTV HD PCI. Everything - and I mean everything - has the latest firmware and drivers - as of 4 months ago when I fixed a different problem. So I DON"T WANT TO HEAR the standard answer to check drivers/firmware. THANK YOU.) Thanks for any help.

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• Hardware needed to route between two networks over wireless

  - by AptDweller

  I recently rented an apartment about 100 yards from my brother's house. I have line of sight to his house and can pick up his home AP signal with one of my two laptops if I go out on my balcony (facing his house) or put the laptop by the window. The other laptop will sometimes see the SSID broadcast, but fails to connect, drops, etc. We would like to set up a persistent wireless connection between our homes. We would prefer each network be logically segmented as independent networks, but he will share his internet connection. I've got a bunch of tv shows saved to a NAS by my TiVO that I'd like to make available to him across the wireless link. My brother strongly prefers to not mess with his WAP at all. His network is running fine and is afraid to mess it up. I guess you could say he is "technologically declined". If we can get a reliable 11Mbps connection we will be satisfied. What hardware do I need to make this work? I was thinking a router with two wireless interfaces (external antennas) a wired interface, and a directional antenna mounted on my balcony facing his house. Can anyone recommend hardware to make this happen? Cheaper is better. I'll only be living in the area a year or two. I do have an old satellite TV antenna if that can be used to direct the signal.

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• Disaster recovery backup of files/photos for personal use

  - by Renesis

  I'm looking for the best method to store a backup of important files and 5+ years of digital photos that is safe from some type of fire/flood disaster in my home. I'm looking for: Affordable: Less than $100/yr or first-time cost. Reliable: At least a smaller chance of failing than there is of fire or flood Easy for initial backup and to add to, and at least semi-easy to recover. I recently purchased a small home safe for physical vitals. It was inexpensive, solid, and is fire/water safe. If I had a physical copy of the digital files, the safe would work fine for this, but I don't know what to store in it that adequately meets the requirements above. Hard drive - I read that the danger of it not spinning up makes a hard drive a bad choice for this type of storage, although it was my first thought and would definitely be the simplest choice - very easy to take out once a month and add files to. DVDs - Way too much of a hassle for both backup and restore. Tape - No idea on the affordability of this option Online - Given that I have at least 300GB already and ever-increasing megapixels means ever-bigger files, and my ISP upload is about 2Mb at the best, this just doesn't sound like a good option for me, but I could be convinced. Other - Have I missed something? Also, I'm already covered both for sync between computers (Dropbox) and a nightly backup of these files (External HDD). The problem with the nightly backup is obviously that it's always with the computer and in a disaster would be destroyed along with it. Is anyone else doing something similar? Is the HDD as poor of a choice as I read, or is it a feasible option? Maybe two to reduce the likelihood of failure?

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• Windows 7 Not Recognizing Camera Nor iPhone as Camera

  - by taudep

  I've been struggling with this one for a few days. I've recently upgraded an older computer to Windows 7 Home Premium. Neither my digital camera (A Canon SD1200IS) nor iPhone are ever detected as cameras, nor ever show up as accessable in Explorer. With the Canon camera, no driver is required. It's supposed to work with the default Windows 7 drivers. However, in the Control Panel's Device Manager, I'm always seeing a yellow icon next to the "Canon Digital Camera" device. I've uninstalled the device and let Windows attempt to reinstall, but it can never find a driver to install. With the iPhone, it's very similar. One big difference, though, is that iTunes can see the iPhone and back it up, etc. However, again when I go to the Device Manager, there's a yellow icon next to the iPhone. I've uninstalled iTunes, reinstalled, rebooted, deleted drivers, and let Window try to reinstall the driver, but it can never find the driver. So there seems to be some correlation that my machine can't detect cameras properly, and that it might be even a lower-level type of driver I'm struggling with. I know that USB however, does work, because I have have an external drive hooked into the machine. I've gone through the web and tried two hours worth of fixes, without success. I feel like if I can get the Canon camera detected, then the iPhone will be on it's way to being fixed too. BTW, I couldn't really find anything of use in the Event viewer. Any and all suggestions welcome.

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• Getting Dell E6320 with I7 to work with 3 monitors at 1920x1080p x 3

  - by MadBoy

  I want to buy Dell E6320 which comes with Intel Core I7-2620M (2.70GHz, 4MB cache, Dual Core) with Intel HD Graphics 3000. Laptop will come with docking station. I want to connect 3 monitors to that docking station so that working at home would give me some additional boost. Docking station will allow me to connect only 2 monitors so I'm looking at following other options: Matrox TRIPLEHEAD2GO DIGITAL Edition or TRIPLEHEAD2GO DP Edition. But reading Matrox Support Page intel GPU can't run the highest resolution with 3 monitors connected, it even gets worse since it seems monitors would have to be able to work at 50hz. Also I'm not sure but it seems that Matrox doesn't split the monitors as 3 separate monitors but simply as one big space (which is a bit opposite to what I need) Buy 2 or maybe just 1 USB based monitor but it would also mean having 1 or 2 different monitors then the main one, unless I buy 3 USB based monitors which would mean more money to spend. Also I found only couple of models and most of them require USB 3.0 and no other cables to plug in (nice but costly - couldn't find decent monitor with only USB for sending signal and having power connected normally) . But docking station has only one USB 3.0 port. Can I use hub and still get it to work? Find some converters from Digital to USB (I think DisplayLink does some?) Buy different laptop but what kind? I need it to be I7, small (13"), fast and lightweight. At same time it requires docking station that I can use at home to connect 3 external monitors. Some other suggested solution... Edit: I need 3 monitors for work in terms of coding in Visual Studio or having word/excel/outlook open. Nothing fancy. Maybe some movie once in a while.

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• Which HDD brand do you ..trust

  - by Shiki

  Okay it says its 'subjective' but I believe it's not. Basically I want to ask the community about your preference. Not really 'preference' but actual experience. Like if you never had a problem with Western Digital, then write that in an answer, or if there is one with WD, just vote it up. And so on. (Heard so many stories, experiences. I only had Samsung, Maxtor, WD, Seagate HDDs. Samsung died with bad blocks, had anomalies. Maxtor died so fast I couldn't even try it really and it's really hot, loud. Seagate is just as loud as a jet plane, and moderately hot. My WD (green) is quiet, really cool and somewhat fast. That's all I have about experiences. So I would say Western Digital in an answer (OR Hitachi. Never had one yet, but every expert I know says I should get one since they even had problems with WD but Hitachi seems to be ok. (My laptop comes with Hitachi hdd but I don't think its really relevant.)) Basically I mean desktop 7200RPM HDDs here. Well.. notebook HDDs are ok also, but no raptor/scsi/server ones. Hope you get what I meant and it won't get closed.

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• Monitor is flashing through camera but not in the naked eye

  - by odyodyodys

  Two monitors: Samsung T23C350 - Samsung 2243NW Lets call the first A and the other B. A is a LED monitor with a 2ms response time (in specs) with a native resolution of 1920*1080@60Hz B is an older not-led one with 5ms response in specs with a resolution of 1680*1050@60Hz In the attached images and video you'll see that A (on the LEFT) is flickering but this is not visible to the naked eye. I took some pictures and videos with a camera and a mobile phone. This is also happening to all digital camcorders I've tested. A has a setting response time with values normal, fast, fastest. No matter the setting, the effect is the same. A on the left and B on the right. You can see the flickering, although both are @60Hz A video where you can see both monitors. A is always the left monitor. Another video where you can see what my digital camera sees. Another thing is that I managed to get a picture where the left monitor is completely black whilst the right one is displaying fine. This proves that the monitor is continuously flashing. My question is: Is this normal behavior and what is causing it? Am I affected by this fast flickering? I am using this as my primary monitor and as a programmer I have to keep my eyes on it for hours.

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• Are there any disadvantages of having a "free fall sensor" on a hard disk drive?

  - by therobyouknow

  This is a general question that came out of a specific comparison between the Western Digital Scorpio WD3200BEKT and Western Digital Scorpio WD3200BJKT (which is the same as the former but with a free fall sensor.) Note: I'm not asking for a review or appraisal of these specific drives, as the general question does apply on other brands as well. Though your input would help my decision. To break down the general question in order to answer it, I would be looking for comments on things like: if it's necessary to have differing physical dimensions between free fall sensor drives and those without, e.g. does it make it any thicker, and therefore reduce the systems where it can be installed - particularly smaller laptops? does it actually make the system less reliable - because of false alarms whereby the drive thought the laptop was falling but it wasn't? I suppose that the fact that a manufacturer produces both drives with and without free fall sensors says something about possible disadvantages. Or it could be standard marketing techniques where by making drives with and without results in larger sales volume than just those with the feature alone.

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• Organizing automatically Windows Files and Folders

  - by Kiquenet

  For Windows only, Organizing the eleventy-billion files you've got stuffed into folders on your hard drive is very "hard". For example, I have one folder on my computer that I save all web downloads to, regardless of file type, size or purpose. Many of the files are only temporary downloads, for instance setup files of applications that I test, demonstration videos that I watch once or documents that I want to read. Some files on the other hand are there to stay, and I used to move them out of the download folder manually in the past. Another files in folders in my computer: many source code, tests, programs, tools, ... I need tecnology for organize billion files. Which best tools for organize, sort, etc automatically your files-folders? Digital Janitor http://davidevitelaru.com/software/digital-janitor/ Belverede http://lifehacker.com/5510961/how-to-automatically-clean-and-organize-your-desktop-downloads-and-other-folders Download Mover http://www.neoteo.com/download-mover-reorganiza-tus-descargas-14188 File/Folder Date Organizer http://seedling.dcmembers.com/other/ffdorg.zip DropIt http://www.lupopensuite.com/db/dropit.htm Others issues about organization files, desktop, etc How to automate the process of organizing audio files on Windows Organizing My Windows Desktop What's a good way for organizing PDF documents on Windows? Folksonomy tagging for files What is your method of “folksonomy” tagging for files on your local machine?

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• Upstart can't determine my process' pid

  - by sirlark

  I'm writing an upstart script for a small service I've written for my colleagues. My upstart job can start the service, but when it does it only outputs queryqueue start/running; note the lack of a pid as given for other services. #/etc/init/queryqueue.conf description "Query Queue Daemon" author "---" start on started mysql stop on stopping mysql expect fork env DEFAULTFILE=/etc/default/queryqueue umask 007 kill timeout 30 pre-start script #if [ -f "$DEFAULTFILE" ]; then # . "$DEFAULTFILE" #fi [ ! -f /var/run/queryqueue.sock ] || rm -rf /var/run/queryqueue.sock #exec /usr/local/sbin/queryqueue -s /var/run/queryqueue.sock -d -l /tmp/upstart.log -p $PIDFILE -n $NUM_WORKERS $CLEANCACHE $FLUSHCACHE $CACHECONN end script script #Originally this stanza didn't exist at all if [ -f "$DEFAULTFILE" ]; then . "$DEFAULTFILE" fi exec /usr/local/sbin/queryqueue -s /var/run/queryqueue.sock -d -l /tmp/upstart.log -p $PIDFILE -n $NUM_WORKERS $CLEANCACHE $FLUSHCACHE $CACHECONN end script post-start script for i in `seq 1 5` ; do [ -S /var/run/queryqueue.sock ] && exit 0 sleep 1 done exit 1 end script The service in question is a python script, which when run without error, forks using the code below right after checking command line options and basic environmental sanity, so I tell upstart to expect fork. pid = os.fork() if pid != 0: sys.exit(0) The script is executable, and has a python shebang. I can send the TERM signal to the process manually, and it quits gracefully. But running stop queryqueue claims queryqueue stop/waiting but the process is still alive and well. Also, it's logs indicate it never received the kill signal. I'm guessing this is because upstart doesn't know which pid it has. I've also tried expect daemon and leaving the expect clause out entirely, but there's no change in behaviour. How can I get upstart to determine the pid of the exec'd process

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• 802.11g -> wired ethernet bridging not working

  - by Malachi

  Usually people want to go the other direction, but I want to take our relatively fast and stable house 802.11g signal and bridge it to ethernet. I have tried using an Airport Express (the b/g flavor) and my i7 MacBook pro, both to no avail. Word is that the b/g flavor of This flavor of Airport Express maxes at firmware 6.3 which doesn't support this kind of bridging properly. However, I expected my MacBook pro to do the job with its "Internet Sharing" feature. Alas, although my wired PC does sort of see it, it doesn't work out. Strangely, using DHCP the PC receives the same IP address as my MBP uses on the network. Less strangely, but still surprisingly, the wired ethernet port on my mac registers as the IP address of the gateway when queried with IFCONFIG. It sort of makes sense that the mac would "pretend" to be the gateway, but the whole thing just isn't working and seems configured wrong - but all the docs I see say basically "OS X Internet Sharing: click it and go". What do I do? Do i really have to buy more hardware, even though I have plenty of would-be candidates for bridging? Incidentally, the host router originating the 802.11g signal is a belkin 802.11g router, and is documented to support WDS.

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• Varnish gets in a restart loop and causes the system to lock up; how can I fix?

  - by chrism2671

  Here is an extract from the syslog. Mar 2 14:01:10 ip-10-226-34-17 varnishd[20204]: Child (20205) not responding to ping, killing it. Mar 2 14:01:16 ip-10-226-34-17 varnishd[20204]: Child (20205) not responding to ping, killing it. Mar 2 14:01:16 ip-10-226-34-17 varnishd[20204]: Child (20205) died signal=3 Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: Child cleanup complete Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: child (13224) Started Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: Child (13224) said Closed fds: 4 5 6 10 11 13 14 Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: Child (13224) said Child starts Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: Child (13224) said managed to mmap 536870912 bytes of 536870912 Mar 2 14:01:21 ip-10-226-34-17 varnishd[20204]: Child (13224) said Ready Mar 2 14:01:35 ip-10-226-34-17 varnishd[20204]: Child (13224) not responding to ping, killing it. Mar 2 14:02:10 ip-10-226-34-17 last message repeated 7 times Mar 2 14:03:15 ip-10-226-34-17 last message repeated 13 times Mar 2 14:03:20 ip-10-226-34-17 varnishd[20204]: Child (13224) not responding to ping, killing it. Mar 2 14:05:53 ip-10-226-34-17 varnishd[20204]: Child (13224) not responding to ping, killing it. Mar 2 14:05:53 ip-10-226-34-17 varnishd[20204]: Child (13224) not responding to ping, killing it. Mar 2 14:05:53 ip-10-226-34-17 varnishd[20204]: Child (13224) died signal=3 Mar 2 14:05:53 ip-10-226-34-17 varnishd[20204]: Child cleanup complete Mar 2 14:05:53 ip-10-226-34-17 varnishd[20204]: child (13288) Started I'm not expecting a solution here but any help just to decode what each line is doing would be very instructive. Many thanks!

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• How to play WAV file through Network Paging Interface

  - by BGM

  In our building we have a Viking Paging ZPI-4 Interface for our intercom. The interface receives data from our Asterisk Phone system via a Cisco SPA112 Port Adapter which has it's own IP address on the network and converts digital into analog. Asterisk plays the "5" tone and then allows the user's voice to commence over the connection. Now, what I want to do is to play a wav file over this Viking Paging device using the Cisco Port Adapter. I know how to get Asterisk to do it, but I want to do this without Asterisk. I want some kind of program that can talk to the Cisco Port Adapter and then transmit the wav file into the Viking Paging Device. What kind of program do I need to get or make? Now, I found this link if it helps anyone with ideas. I also found this information, but I'm not sure how to apply it. I also found this, but it involves an arduino. However, I already have the analog-to-digital convertor, and the Viking will handle sending sound over the paging speakers. I just need to know how to send the wav file to the Viking via the Port Adapter. So far, I know my wav file should be formatted as 8bit mono, and I need to send the "5" tone to open the Viking Pager's channel. [update] I am trying to figure out if I can use VLC player to stream to the ipaddress of the Port Adapter. So far I'm not having success with that, and don't even know if it will work. Windows Media Player has a streaming option too. I am thinking that since the Cisco Port Adapter thinks it is a sort of phone, that the only way this can be done is via SIP.

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• Dual-monitor Windows XP, monitors are "identified wrong"

  - by Susan

  Trying to use a dual-monitor desktop system with Windows XP.... 1 graphics card... with digital/analog outputs. Picking: Desktop - Properties - Settings - Identify It shows "2" as my left monitor... and "1" as my right. How do I switch them around? Here's what I've tried so far: Switch the cables (I can't. I need the digital cable on the better monitor.) Switch the monitors (I can't. One has a few dead pixels.) Drag the 1+2 graphics around (That doesn't change the IDENTIFY numbers.) Pick "use as primary" or "extend" (That doesn't change the IDENTIFY numbers.) Anything else I can try? What exactly controls/switches the "IDENTIFY numbers" around? I know it can be done. For weeks I ran this exact set-up... with the CORRECT numbers appearing on the monitors.... then just recently... after a few reboots... they now appear "switched around".

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• Why does my Belkin Play router regularly stop working for a few minutes at a time?

  - by YeahStu

  I recently purchased a Belking Play dual-band router for my home. About every few hours, the router stops working or "cuts out" for several minutes before coming back online automatically. My old one did this as well. I figured out a main problem was my wireless home phone, which sends a 2.4GHz signal. Anytime someone would call the phone, my router would get interrupted. Therefore, I unplugged this phone and got a wired phone. Unfortunately, my wired phone has the same problem. Therefore, I unplugged the wired phone. Unfortunately, my router still has regular issues. I live in a home with neighbors within close proximity to me, so it might be possible that their devices are the ones causing me problems. How can I determine what is causing my router problems? I thought that the point of a dual-band router was that if a signal was interfering on one band then it would be uninterrupted on another. However, it seems that is not the case. Does anyone have any tips on how to troubleshoot this or any knowledge you can share to properly set my expectations?

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• How to make gpg2 flush the stream?

  - by Vi

  I want to get some slowly flowing data saved in encrypted form at the device which can be turned off abruptly. But gpg2 seems to not to flush it's output frequently and I get broken files when I try to read such truncated file. vi@vi-notebook:~$ cat asdkfgmafl asdkfgmafl ggggg ggggg 2342 2342 cat behaves normally. I see the output right after input. vi@vi-notebook:~$ gpg2 -er _Vi --batch ?pE??x...(more binary data here)....???-??.... asdfsadf 22223 sdfsdfasf Still no data... Still no output... ^C gpg: signal Interrupt caught ... exiting vi@vi-notebook:~$ gpg2 -er _Vi --batch /tmp/qqq skdmfasldf gkvmdfwwerwer zfzdfdsfl ^\ gpg: signal Quit caught ... exiting Quit vi@vi-notebook:~$ gpg2 " 2048-bit ELG key, ID 78F446CA, created 2008-01-06 (main key ID 1735A052) gpg: [don't know]: 1st length byte missing vi@vi-notebook:~$ # Where is my "skdmfasldf" How to make gpg2 to handle such case? I want it to put enough output to reconstruct each incoming chunk of input. (Also fsyncing after each output can be benefitial as an additional option). Should I use other tool (I need pubkey encryption).

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• Wifi antenna extension with F-connector/RG-6(RG-59) cable?

  - by rjz2000

  In an older house, the wire mesh in walls surrounding the furnace behave like a Faraday cage and block wifi signals. It is also difficult to lay new cable, however there is television cable to multiple locations due to there once having been a roof-installed, television antenna. It would be relatively trivial to install the wifi router at the center distribution point, then have the antenna broadcasting/receiving the signal plugged in at each of the old television outlets. I assume that it would not be too difficult to find an adapter for SMA <- F-type connectors. The cable is actually RG-59 rather than RG-6, but I assume that it still has relatively good RF isolation along its length, which is no more than a couple hundred feet in any direction. Does anyone know a problem with the idea? Will a router get confused if there is /too little/ interference between the two antenna? Is that length of cable (~100ft) too long for the signal a router broadcasts? I have seen that it is also possible to use old ~$30/each FiOS cable modems available on eBay to extend a network over television cable. However, that seems like a less elegant solution, and might interfere with upnp and dlna services I'd like to have work on a single network. Thanks if anyone has answers or suggestions before I try this project!

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• Wifi antenna extension with F-connector/RG-6(RG-59) cable?

  - by rjz2000

  In an older house, the wire mesh in walls surrounding the furnace behave like a Faraday cage and block wifi signals. It is also difficult to lay new cable, however there is television cable to multiple locations due to there once having been a roof-installed, television antenna. It would be relatively trivial to install the wifi router at the center distribution point, then have the antenna broadcasting/receiving the signal plugged in at each of the old television outlets. I assume that it would not be too difficult to find an adapter for SMA <- F-type connectors. The cable is actually RG-59 rather than RG-6, but I assume that it still has relatively good RF isolation along its length, which is no more than a couple hundred feet in any direction. Does anyone know a problem with the idea? Will a router get confused if there is /too little/ interference between the two antenna? Is that length of cable (~100ft) too long for the signal a router broadcasts? I have seen that it is also possible to use old ~$30/each FiOS cable modems available on eBay to extend a network over television cable. However, that seems like a less elegant solution, and might interfere with upnp and dlna services I'd like to have work on a single network. Thanks if anyone has answers or suggestions before I try this project!

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• Stepmania + KDE4 = sound problem

  - by picca

  I cannot manage to get KDE4 + stepmania working. If I run StepMania I always get: StepMania 3.9 Log starting 2010-12-24 14:52:48 Loading window: gtk OS: Linux ver 020636 Crash backtrace component: x86 custom backtrace Crash lookup component: dladdr Crash demangle component: cxa_demangle Runtime library: glibc 2.11.2 Threads library: NPTL 2.11.2 TLS is available ALSA: Advanced Linux Sound Architecture Driver Version 1.0.23. ALSA Driver: 0: HDA ATI SB [SB], device 0: STAC92xx Analog [STAC92xx Analog], 0/1 subdevices avail ALSA Driver: 0: HDA ATI SB [SB], device 1: STAC92xx Digital [STAC92xx Digital], 1/1 subdevices avail Couldn't load driver ALSA: dsnd_pcm_open(hw:0): Device or resource busy Mixing 0.000000 ahead in 0 Mix() calls Couldn't load driver ALSA-sw: dsnd_pcm_open(hw:0): Device or resource busy Mixing 0.000000 ahead in 0 Mix() calls Couldn't load driver OSS: RageSound_OSS: Couldn't open /dev/dsp: Device or resource busy Language: english Theme: default Error: Couldn't find a sound driver that works I found that in StepMania/Data/StepMania.ini I should add following line: SoundDevice=default That enables me to run StepMania, but I don't have any sound. Which is pretty bad for an application like this one. I'm quite sure that the problem is in phonon that is blocking the audio device to which StepMania needs to access directly. I think that I can fix this if I run other (lighter) window-manager than KDE4. But that is not a solution occasional linux user. Do I have any chance to get StepMania under KDE4 completely working?

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• RAID-capable 3.5" SATA Drives

  - by nroam

  I recently purchased a pair of 1TB Western Digital WD1002FBYS RE3 drives for use in an external RAID enclosure. I have found that they tend to drop out of the array after a while. Thinking it was the enclosure I tried them on another one but found the same issue. So a bit of googling and I found http://www.tomshardware.com/forum/251076-32-raid-issues-western-digital-hard-disk which suggests that: "WD's "RE" (RAID Edition) HDDs support Time-Limited Error Recovery ("TLER" ): http://www.wdc.com/en/products/productcatalog.asp?language=en As a non-TLER HDD fills up with data, the error detection firmware might take too long, and the RAID controller may drop that HDD from a RAID array." So now I wonder what SATA drives have firmware which is compatible with RAID arrays (esp. RAID 1, 5, but not 0)? I have not been able to come up with the magic set of keywords to ellicit the answer from Google. However, various sites suggest that Seagate & Hitachi are in general OK. Does anyone have any generic (or even specific) guidance on how to work out if a drive's firmware may harbour code that is potentially an issue in a RAID0 setting other than stating that it must be 'enterprise' ready?

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• How do I lower the hardware volume? (volume too high)

  - by Zom-B

  I have a 4yo Dell laptop with Windows XP Pro (modern ones unfortunately don't have a physical volume knob), and lately I'm using my Apple earphones, because they have much better low frequency response than my $10 earphones. They also have the side effect of being much louder. To give an indication of my agony, for most tasks (movie, music, games) I have my main volume at 3 ticks: drag to 0 with the mouse and press the up key 3 times (the handle does not even raise 1 pixel) and my wave volume at 50%. I notice that when I do this, I have a lot of digital noise, because I'm using just a tiny fraction of the 16-bit space. If I drag the Wave slider down until I barely hear the audio, it becomes really distorted and noisy, indicating that this is digital volume (in the DirectSound driver or something) and not hardware volume. I experimented in Audition. When I make a tone of 1000Hz at -50db, (all windows volumes at max) the volume is just below my pain threshold. When I zoom in to see how high the sample values reach, I see that just 8 of the 16 bits are used (about -100 ~ 100). When I generate such tone at -80db (minimum I can specify) then I can still clearly hear the tone, although really noisy. When I zoom in, I see that just 3 out of 16 bits are used. I created a squarewave tone that is just 1 bit high, and I can still hear it! For most uses, this is not a big problem (audiophiles will disagree!), as I just have more noise than usual (about the same as old 8 bit hardware), but I'm also in the process of programming a hearing test program, in which case this problem is a death blow as the test subjects will even hear tones at the bottom of the theoretical range (lowering the windows volume is futile, see above) (I cannot update drivers, as Dell has discontinued XP support for my model)

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• Strange File-Server I/O Spikes - What Is Causing This?

  - by CruftRemover

  I am currently having a problem with a small Linux server that is providing file-sharing services to four Windows 7 32-bit clients. The server is an AMD PhenomX3 with two Western Digital 10EADS (1TB) drives, attached to a Gigabyte GA-MA770T-UD3 mainboard and running Ubuntu Server 10.04.1 LTS. The client machines are taking an extremely long time to access/transfer data on the file server. Applications often become non-responsive while trying to open files located remotely, or one program attempting to open a file but having to wait will prevent other software from accessing network resources at all. Other examples include one image taking 20 seconds or more to open, and in one instance a user waited 110 seconds for Microsoft Word 2007 to save a document. I had initially thought the problem was network-related, but this appears not to be the case. All cables and switches have been tested (one cable was replaced) for verification. This was additionally confirmed when closing down all client machines and rebooting the server resulted in the hard-drive light staying on solid during the startup process. For the first 15 minutes during boot, logon and after logging on (with no client machines attached), the system displayed a load average of 4 or higher. Symptoms included waiting several minutes for the logon prompt to appear, and then several minutes for the password prompt to appear after typing in a user name. After logon, it also took upwards of 45 seconds for the 'smartctl' man page to appear after the command 'man smartctl' was issued. After 15 minutes of this behaviour, the load average dropped to around 0.02 and the machine behaved normally. I have also considered that the problem is hard-drive-related, however diagnostic programs reveal no drive problems. Western Digital DLG, Spinrite and SMARTUDM show no abnormal characteristics - the drives are in perfect health as far as the hardware is concerned. I have thus far been completely unable to track down the cause of this problem, so any help is greatly appreciated. Requested Information: Output of 'free' hxxp://pastebin.com/mfsJS8HS (stupid spam filter) The command 'hdparm -d /dev/sda1' reports: HDIO_GET_DMA failed: Inappropriate ioctl for device (the BIOS is set to AHCI - I probably should have mentioned that).

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