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• No monitor output after fresh install of 11.10 64-bit

  - by James

  I have a machine with a Nvidia 8600GT graphics card and a CRT monitor. Previously, I have only used Windows on it, and the graphics card seems to be working correctly in Windows 7. I booted up and installed Ubuntu 11.10 amd64 from the LiveCD and the whole process worked perfectly. When I tried to boot off the hard disk for the first time, the output to the monitor switched off during the splash screen, and this happens consistently. I can ctrl-alt-f2, so I tried an apt-get upgrade, which didn't help; nor did apt-get install nvidia-current. There is nothing that looks relevant in dmesg. Booting with the nomodeset option has no effect. Following the answers in this similar thread, I tried apt-get purge nvidia-173. Both startx and service lightdm start just say the service is already running. Does anyone know how to find out what the problem is? I was wondering if it is just that Ubuntu is trying to use a resolution that the monitor doesn't support, but I can't find out how to change that from the command line.

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• Block a machine from accessing the internet

  - by Simon Rigby

  After some confirmation that I have thinking right in this scenario. We have a number of wired and wireless machines which presently have direct internet access. I also have a Linux (Ubuntu) server which is used as a file server for the network. Essentially I would like to be able to turn internet access on and off for machines. My plan is to block these machines by MAC address at the router. I would then set up a proxy server on the Linux box (ie Squid) so that the machines I wish to restrict can access the internet via the proxy. As I can adjust access via ACLs in squid, I would be able to switch on or off a machines access to the internet without having to further adjust the router's MAC rules. And of course I could go further and create a few scripts to assist with this admin task. Does this seem sound and have I over looked anything? Any help greatly appreciated. Simon.

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• Why can't gif images copy at a reasonable speed on this dell laptop with XP?

  - by alt234

  I've got this somewhat old Dell Latitude D810. Strangest thing... If I try to copy anything that has gif files in it the gif files take forever. Like a few minutes per gif regardless of size. Everything else copies fine. I notice this when copying files off our network, copying off multiple external drives, and even when files are copying during an installation process. I'm on Windows XP Pro service pack 3. I've never seen anything like this before. Anyone else?

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• Stop UAC/Secure Desktop from dimming the screen

  - by Florian

  I like the concepts of UAC and the "Secure Desktop" in Windows 7, but I don't like the dimming of the Secure Desktop to prompt for Admin credentials (or OK button to get clicked). However, dimming goes so far that my monitor regularly goes into PowerSaver mode, which is annoying (as it takes another 10 seconds for it to wake up), and might harm the monitor: two weeks after switching from XP to Windows 7, my 30" monitor stayed black and it had to get replaced. The web is full of tips how to turn off dimming, but that will always also turn off the "Secure Desktop". Is there a way to present the Secure Desktop without dimming? Or with a different visual effect to show that it is the Secure Desktop? EDIT: To clarify, I'm not looking for a way to disable dimming by disabling Secure Desktop (as is done by lowering the UAC level). I want to keep both UAC and Secure Desktop.

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• Second Monitor Detected, but not receiving a signal after upgrading to 12.04

  - by user62458

  After I upgraded to 12.04, my second monitor is detected (in display settings), but will not power on. I have scoured the Internet and forums for a solution and I can't find anything. I have found a couple people with the same problem, but never a solution for it. I am no expert, but I'm certainly not a noob. My computer uses AMD Radeon 6250 graphics, but I do NOT want to use the proprietary graphics drivers. They refuse to work properly with my second monitor (they ATI drivers will only mirror screens, and I've done everything to try to fix it, and I DON't want mirrored screens) Not to mention that the default open-source video drivers seem to work much better than the proprietary anyway! Again, Ubuntu's default video drivers work fine, and they even DETECT the second monitor (Dell 19'). I can drag stuff off the screen and put it on the 'space' of the second monitor and even a screen-shot shows that there are two monitors active; but the monitor is OFF. It will not power on. It goes into 'power-save' mode because it is not receiving a signal. For some reason it is not getting the signal to power on, even though Ubuntu thinks the monitor is working properly. I had this working fine on my Sony VAIO yesterday (with Radeon graphics/default Ubuntu video drivers). I upgraded to a Samsung Series 3 and now I have this issue. I can't for the life of me figure out why the monitor is connected, detected and I have screen space for the monitor, but the screen won't turn on! XRANDR Output: Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 VGA-0 connected (normal left inverted right x axis y axis) 1440x900 59.9 + 75.0 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 640x480 72.8 75.0 66.7 60.0 720x400 70.1 LVDS connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm 1366x768 60.1*+ 1280x720 59.9 1152x768 59.8 1024x768 59.9 800x600 59.9 848x480 59.7 720x480 59.7 640x480 59.4 HDMI-0 disconnected (normal left inverted right x axis y axis)

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• How can I automatically lower Spotify playback volume when my Video Editing program makes a sound?

  - by Mark Major

  I'd like to listen to Spotify while I am video editing. This is just casual listening - nothing to do with the editing work. How can I automatically fade out the volume of Spotify when my video editing program plays audio? I often need to hear the video editing audio without the distraction of Spotify playing over the top, but the video editing playback is too on/off/on/off to switch Spotify audio manually each time. Without background music, I get really sick of the repeated playback of the audio clips with only silence inbetween. I suppose what I needd is an app that monitors sound output from 'App A' and reduces the sound output from all others (Apps B, C, D, etc) when something is played.

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• Duplicate name exists solution

  - by user978733

  I have about 70 pc's with exactly same hardware. I decided to automate turning on and off. I took 1 PC. Here is what I've done: Changed bios configuration so that now pc's waking when I turn on AC switch Installed Windows XP and configured so that I can turn off remotelly, changed workgroup name to "WG1", and pc name to "ExamPC" Then created acronis backup image of this pc I installed this image in several PC's and tried to test All worked well till windows opened. The problem is, all tested PC's started Windows nearly at the same time, and all of them popped up error Duplicate name exist. I can't figure out any solution. Any suggestions?

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• How do Unity 12.04/Compiz bindings really work?

  - by Daniel

  There is a bewildering array of places to set bindings, all inconsistent with one another. E.g. in Unity's System Settings having the Ctrl-key highlight the mouse position is an on/off choice. I like the feature, but not on such a prominent key where I keep activating it accidentally. The keyboard shortcuts allow only one binding per command, where I might like a convenient one on the external keyboard and an emergency alternative for when I'm on the road. Keyboard custom shortcuts has a nice interface, but allows only key bindings — besides it doesn't seem to work for me. So I activated CCSM Commands. There I have the choice of key-, mouse- and/or edge bindings. Whereas some places in CCSM offers only one or two of these binding possibilities, randomly at the whim of the programmer. I have not found a way to differentiate a mouse-drag from a click. E.g. I want <SuperMouse1-drag anywhere on a window to move it, while if I don't drag, it should be raise-lower. On the title bar I want the same without needing the <Super key. Now I find raise-lower only in System Settings where I can't assign a mouse binding. If therefore in CCSM I fallback to only lower and put move on the same binding, the window already gets lowered on mouse down, and I can then invisibly move it. Very useful! I have <Altasciicircum get in the way of an Emacs binding, with some to me useless popup overlay. I can find it nowhere, so I can't turn it off. So how can I go without these frontends until they have matured, and instruct Compiz directly, for example in the way Emacs or Sawfish have keymaps, and separate ones for each context, with inheritance?

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• Pentium 4 Computer Won't Power Up

  - by Harvey

  I have a faulty Pentium 4 workstation with data that I would like to retrieve. Here are the symptoms & what I've done so far: Machine is totally dead. Motherboard LED is lit but that is the only sign of life. I have replaced the power supply and bypassed the on/off switch. Tried a PC Analyzer motherboard tester but didn't have any power to the card. Unpluggged the P4 cable from the motherboard, hit the on/off switch, the power supply fan comes on and I get codes from the analyzer but nothing that seems to be of any value. Machine does not boot. Will not shut down by hitting the switch. Bad motherboard or could it be a bad CPU cooling fan?

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• Keyboard doesn't work after Windows resume from sleep (S3) -- how to fix?

  - by Marco Z

  I have a weird issue with my keyboard after resuming from S3 sleep: I can type perfectly for maybe 5 seconds, but afterwards the keyboard ceases to work until I hibernate or restart (or sleep again -- see below.) The rest of my system runs just fine -- just the keyboard apparently "freezes" up. Some closer observations: The keyboard will work for 5 seconds (and freeze again) every time I resume from sleep, even if it was frozen from a previous sleep The caps lock light will work fine within the 5 seconds. But after the keyboard "freezes", the light will remain on, but I'll be unable to turn it off. Perhaps this means power wasn't cut off from the keyboard, but it's just some software freezing up the port??? Given this info, would this indicate a problem with Windows itself? Drivers, maybe? Can I rule out the BIOS as the culprit? Finally, any ideas on how to fix? Thanks! Specs: Windows 7 x64 HP tx1000 laptop

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• Using template questions in a technical interview

  - by Desolate Planet

  I've recently been in an argument with a colleague about technical questions in interviews. As a graduate, I went round lots of companies and noticed they used the same questions. An example is "Can you write a function that determines if a number is prime or not?", 4 years later, I find that particular question is quite common even for a junior developer. I might not be looking at this the correct way, but shouldn't software houses be intelligent enough to think up their own interview questions? I've been to about 16 interviews as a graduate and the same questions came up in about 75% of them. This leads me to believe that many companies are lazy and simply Google: 'Template questions for interviewing software developers' and I look down on that. Question: Is it better to use a set of questions off some template or should software houses strive to be more original and come up with their own interview material? From my point of view, if I failed an interview and went off and looked for good answers to the questions I messed up on, I could fly through the next interview if the questions are the same.

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• Importing an existing project into Git

  - by Andy

  Background During the course of developing our site (ASP.NET), we discovered that our existing source control (SourceGear Vault) wasn't working for us. So, we decided to migrate to Git. The translation has been less than smooth though. Our site is broken up into three environments DEV, QA, and PROD. For tho most part, DEV and the source control repo have been in sync with each other. There is one branch in the repo, if a page was going to be moved up to QA then the file was moved manually, same thing with stuff that was ready for PROD. So, our current QA and PROD environments do not correspond to any particular commit in the master branch. Clarification: The QA and PROD branches are not currently, nor have they ever been in source control. The Question How do I move QA and PROD into Git? Should I forget about the history we've maintained up to this point and start over with a new repo? I could start with everything on PROD, then make a branch and pull in everything from QA, and then make another branch off of that with DEV. That way not only will the branches reflect the differences in the environments, they'll be in the right order chronologically with the newest commits in the DEV branch. What I've tried so far I thought about creating a QA branch off of the current master and using robocopy to make the working folder look like the current QA environment. This doesn't work because the new commit from QA will remove new files from DEV and that will remove them when we merge up, I suspect there will be similar problems if I started QA at an earlier (though not exact) commit from DEV.

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• When can I publish a software tool written at work?

  - by AlexMA

  I'm working on a software problem at work that is fairly generic, but I can't find a library I like to solve it, so I'm considering writing one myself (at least a bare-bones version). I'll be writing some if not all of the 1.0 version at work, since I need it for the project. If turns out well I might want to bring the work home and polish it up just for fun, and maybe release it as an open-source project. However, I'm concerned that if I wrote the 1.0 version at work I may not be allowed to do this from a legal sense. Obviously I could ask my boss (who probably won't care), but I'm curious how other programmers have dealt with this issue and where the law stands here. My one sentence question is, When is it okay (legally/ethically) to open-source a software tool originally written by you for work at work? What if you have expanded the original source significantly during off-hours? Follow-up: Suppose I write the whole thing at home on my time then simply use it at work, does that change things drastically? Follow-up 2: Note that I'm not trying to rip off my employer (I understand that they're paying me to build products that they own)--I'm just wondering if there's a fair way of doing this for all involved... It would be nice if some nonprofit down the road could use my code and save them some time. Also, there's another issue at stake. If I write the library for a very simple, generic thing (like HTML tables in Javascript), does that mean I can never again do so on my own time without putting myself at legal risk (even if it was a whole new fresh rewrite or a segment of a larger project). Am I surrendering my right to write code for this sort of project for the rest of my life (without this company's permission), since the code at work might still be somewhere in my brain influencing me? This seems related to software patents, as a side-note.

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• some keyboard keys not working properly

  - by surfmadpig

  I'm using windows 7. All of a sudden, a couple of hours ago, this happened: My keyboard number keys [above the letters] stopped working properly, both as numbers and as symbols. Only 5 and 6 are functional. Also, I've noticed that the End key isn't working either, and perhaps a couple more from that group. I'm pretty sure it has something to do with those evil Sticky Keys/Filter Keys/ whatever those ease of access things are, BUT I've turned off all the ease of access keyboard options and nothing has changed. Is it possible that something is still turned on while I unchecked it? Are the on/off checkboxes to control WHEN it happens or IF it happens? I also tried rebooting and uninstalling/reinstalling keyboard from device manager, to no avail. It's certainly a software issue and not a hardware issue, as I've tried another keyboard and the problem persists. And, predictably enough, it's annoying. Any ideas?

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• Vista: "Change date and time" causes permissions error

  - by alexsome

  I double-click on the time in the bottom right to open the date and time panel. Then I click on the "Change date and time..." button (which has a shield) and I get the UAC dialog. I click "Continue", then am presented with an error that reads: Unable to continue You do not have permission to perform this task. Please contact your computer administrator for help. I will mention I have Comodo installed, but I have turned it off to test this out and I get the same results. All that I've found while googling were suggestions to turn UAC off, but I am interested in learning what the actual problem is. Thanks in advance.

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• Installing a .NET framework on Windows 7?

  - by user23392

  I just switched to windows 7 from Vista and a lot of programs/games don't work anymore. The issue is that some games need a specific .NET framework version. when I try to install that it says that I should turn on/off windows features. I go to that and I find .NET framework in the list and tried both checking it and unchecking it. Both don't work and I still get the message that I need to turn on/off that thing. Any suggestion please? I have Windows 7 Ultimate 32-bit.

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• Has ec2 made self-hosting possible for 'amateur' sysadmins possible?

  - by Blankman

  I'm a developer, and it seems ec2 has made it possible for a amateur sysadmin like me to setup and maintain a fairly large set of servers. Now I don't mean to undermine real sys admins, as I know the value of them but what I am trying to get at is that someone like me can setup and maintain a cluster of servers (front end web servers, with some db servers) using tools like ec2 and capistrano with the help of google. Now this isn't something I would do as a long term thing, but as a startup, one-man operation, I think I can pull this off until business takes off and I can hire this important role out. With ec2, I get my firewall, so I basically open up port 80 on my public facing server, which will run haproxy and route requests to my cluster of servers. Ofcourse I am simplifying the setup, but just want a feel for what you guys think about my perception. My application is a web application, that will be runing Ruby on rails (passenger) and talking to mysql or postgresql.

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• How to Architect a system on AWS for scaling (with a MySQL back-end)

  - by Edan Maor

  I'm trying to understand how to architect an Amazon Web Services application. As I understand it, the whole point of using something like AWS is to make the eventual scaling easier, so I'm trying to understand how to do that. I have an instance, running off of EBS (EBS-based instance, not a regular instance). My application (a Django app) uses MySQL as a back-end. So the question is, where am I supposed to install the MySQL? Do I install it on the same instance? In which case, as far as I can tell, I can't simply create more server instances from that image. Or am I supposed to simply spin up another server as a DB server, and run off of that? Thanks for any help!

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• ubuntu 12.04 LTS hangs on boot when external monitor is connected

  - by vladeta

  I have a problem with my fresh installed Ubuntu 12.04 LTS on my Dell M4600: nVidia quadro 2000M i7-2860 16GB ram 128GB SSD Dell/Samsung 750GB HDD IPS RGB laptop display When it is connected via DP++ to the external Dell U2311H monitor, it hangs on boot or when wakening from suspend. If I detach the DP cable it boots normally. I have tried all combinations that I have found, as adding to grub: "no splash", "boot=pci", "acpi=off", etc... I have also changed in nVidia X settings that external monitor is the primary one and also tried to delete monitor.xml file. There is no change it hangs each time after grub. It starts to load daemons then both screens are blank and then completely hangs with beep sound. What I discovered is if I detach the cable and wait for about 2 sec after grub starts booting and then physically connect DP cable while the Ubuntu is still booting everything works normally and I have a picture on my external screen while the laptop screen is off, just as I wanted. Do you maybe know how to solve this issue? Thank You.

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• Linksys Wireless-N ADSL2 WAG160N losing connection

  - by Sam1973

  It seems that recently I have to turn off and then turn on my router every time I want to connect my laptop(s) to the internet. This is what's happens: When I want to connect to the internet on my laptop, the network icon in the system tray states that I am connected to the wireless network but there's no "internet connectivity" I turn off the router and turn it back on and then I can connect to the internet. I am sure there is something that needs to be done. Can you guys point me to the right direction?

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• Lost Root and other user passwords

  - by Webnet

  This isn't a huge deal, because there's very little on the server (literally a file or two) that we actually need off of it. But we disabled root logins as a security measure and can't remember any of our other user passwords. I'm assuming that there's nothing we can do at this point to get into the server? I'm sitting next to the box... Update Oops... actually, I need to export an SVN off of this server. So yeah, there's stuff I need.

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• Client Side Prediction for a Look Vector

  - by Mike Sawayda

  So I am making a first person networked shooter. I am working on client-side prediction where I am predicting player position and look vectors client-side based on input messages received from the server. Right now I am only worried about the look vectors though. I am receiving the correct look vector from the server about 20 times per second and I am checking that against the look vector that I have client side. I want to interpolate the clients look vector towards the correct one that is server side over a period of time. Therefore no matter how far you are away from the servers look vector you will interpolate to it over the same amount of time. Ex. if you were 10 degrees off it would take the same amount of time as if you were 2 degrees off to be correctly lined up with the server copy. My code looks something like this but the problem is that the amount that you are changing the clients copy gets infinitesimally small so you will actually never reach the servers copy. This is because I am always calculating the difference and only moving by a percentage of that every frame. Does anyone have any suggestions on how to interpolate towards the servers copy correctly? if(rotationDiffY > ClientSideAttributes::minRotation) { if(serverRotY > clientRotY) { playerObjects[i]->collisionObject->rotation.y += (rotationDiffY * deltaTime); } else { playerObjects[i]->collisionObject->rotation.y -= (rotationDiffY deltaTime); } }

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• Anyone have any experience with bargain laptop batteries?

  - by chris

  I've got an oldish D820 that's got a 100% dead battery. I know that I could, in theory, take it apart and replace bad cells in the battery. I'm not really comfortable with doing that. I also know that there are various places that sell replacement batteries for 20% to 80% of the cost that Dell would charge. Does anyone have any experiences with buying more than a couple of these off-brand batteries? If a battery goes boom, it could be really ugly, so I'd rather not risk it, but at the same time, the dell batteries are really expensive... Any opinions on these ebay / off-brand battery vendors? Thanks!

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• Can I optimize this mod_wsgi / apache file better?

  - by tomwolber

  I am new to Django/Python/ mod_wsgi, and I was wondering if I could optimize this file to reduce memory usage: ServerRoot "/home/<foo>/webapps/django_wsgi/apache2" LoadModule dir_module modules/mod_dir.so LoadModule env_module modules/mod_env.so LoadModule log_config_module modules/mod_log_config.so LoadModule mime_module modules/mod_mime.so LoadModule rewrite_module modules/mod_rewrite.so LoadModule setenvif_module modules/mod_setenvif.so LoadModule wsgi_module modules/mod_wsgi.so LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined CustomLog /home/<foo>/logs/user/access_django_wsgi.log combined ErrorLog /home/<foo>/logs/user/error_django_wsgi.log KeepAlive Off Listen 12345 MaxSpareThreads 3 MinSpareThreads 1 MaxClients 5 MaxRequestsPerChild 300 ServerLimit 4 HostnameLookups Off SetEnvIf X-Forwarded-SSL on HTTPS=1 ThreadsPerChild 5 WSGIDaemonProcess django_wsgi processes=5 python-path=/home/<foo>/webapps/django_wsgi:/home/<foo>/webapps/django_wsgi/lib/python2.6 threads=1 WSGIPythonPath /home/<foo>/webapps/django_wsgi:/home/<foo>/webapps/django_wsgi/lib/python2.6 WSGIScriptAlias /auctions /home/<foo>/webapps/django_wsgi/auctions.wsgi WSGIScriptAlias /achievers /home/<foo>/webapps/django_wsgi/achievers.wsgi

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• How to configure Nginx to serve a variety of back-ends via multiple FCGI processes?

  - by Ben Horton

  I've seen a lot of tutorials showing one how to set up PHP/Python/Perl/RoR on nginx via various FCGI processes. None of the tutorials that I found show one how to serve multiple FCGI services off one server. How would one configure the stable nginx (nginx-0.7.64) to serve multiple FCGI processes (one for each of the above languages)? Example addresses for each FCGI process are as follows: 127.0.0.1:8080 - PHP 127.0.0.1:8081 - Python 127.0.0.1:8082 - Perl 127.0.0.1:8083 - Ruby on Rails An example configuration file that shows one how to implement multiple FCGI's off one server is really what I need. Perhaps others will benefit as well.

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