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• How do I read my PDFs and watch videos properly again?

  - by asp

  Whenever I watch videos, either online of local via Totem and/or open PDF files using evince. The system gets really, really bogged down. All apps get really slow, menus take forever to display, switching windows gives me time to make a coffee, etc. I have a couple of bug reports open on this, but what do I need to do to really troubleshoot the issue? I've purged Adobe Flash from the system, but YouTube HTML5 videos still have the issue. A bunch of PDFs saved locally trigger the problem. And to (temporarily) remove the slowness, I need to shutdown the computer, breath for a few minutes, then restart. A simple reboot does not do the trick. How can I identify the cause? This only started on 13.04. I've had Ubuntu on this machine for a year without a problem until "upgrading" to 13.04. I am not a programmer, but I suspect an issue with the Intel video driver.

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• Is there any way to downgrade or revert an update to the kernel?

  - by David

  Today I installed the linux 3.9 Kernel update (because I heard it would fix sound through HDMI which I no longer have since installing 13.04). After restarted my computer and logging in my screen has only a desktop, and no dock or tool bar. I tried to reset unity and compiz using guides like this one but nothing happens, even after reboot. Is there any way to downgrade or reset the update? EDIT: Running uname -a in terminal brings up 3.8.0 as my current kernel for some reason.

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• Shader Model 3.0 not available

  - by Romy

  I have Acer 4745G with ATI HD 5650 1GB VRAM. After I installed the COD Black Ops trough Wine Playonlinux and successfully installed, and I play the game and then appear message "Shader Model 3.0 not available". I have installed ATI driver 11.8 when I trying this game. And then I'm trying to install the driver from menu "System Administration Additional Driver, it doesn't work. I cannot log in, in the screen appear only the text for log in. And then I uninstall it trough recovery mode. And then I download ATI driver 11.11 from official ATI/AMD website, and then I restart my computer and my screen appearing only text again. I'm using Ubuntu (Ultimate Edition) 11.04. How to overcome this problem?

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• How do I install drivers for an AMD Radeon HD 6450?

  - by vanysha

  Hi everyone! I bought new computer. The Graphics card is AMD Radeon HD 6450, on Windows 7 it works fine but I try to install driver on Ubuntu, and it says that "No supported adapters detected". I downloaded the driver from here. After installing "Aditional drivers" says that driver is installed. Also my screen resolution in Ubuntu is not maximum. Can you help me install proper driver, please? Thanks in advance!

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• Crash on shutdown when using second monitor

  - by plua

  I have recently added a second monitor to my setup. Instead of one VGA monitor, I now have one VGA and one DVI monitor hooked up to the computer. The displays work just fine. However, ever since this monitor was added Ubuntu (10.10) does not shut down properly. I go to shutdown and it starts shutting down but just hangs and I need to manually shut it down. This has been like this for weeks and I feel not comfortable shutting it down this way over and over again. Has anybody any idea what this can be? Or, also useful, does anybody know how to get some info on why this crash occurs? Any logs that can be used for this? Thanks! Paul

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• How to grant standard users access to disk partitions and flash storage?

  - by JK04

  I have a partition that I need standard users (not administrators)to have read/write access to. However, this partition does not even appear to them as it does to me as an administrator. How can I make it so that standard users can read/write to this partition? It would be nice if they could have the ability to mount it if needed. I have the same problem with removable media - if I have a flash card in the computer, the standard users cannot see this storage media.

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• Need help with AMD catalyst control center

  - by user254074

  I just built my first HTPC and I hooked it up to my Sony KDS-R60XBR1 and I am having display issues. I believe this is only a 1080i display and when I select 1920x1080 on the resolution I get strange lines on the display when anything moves on screen. I am guessing this is because it is putting it in 1080p and the TV cannot process that. As of now I have lowered the resolution and that worked but I would like to get this set at 1080. Also I cannot change the underscan. I am stuck with black borders around the display image. When I pull up the catalyst control center on my computer I am able to adjust all of this stuff but on the one on my HTPC with the TV display I have no options. See images below.

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• Media Hint Brings Hulu, Netflix, and Pandora to non-U.S. Residents

  - by Jason Fitzpatrick

  Chrome: If you’re outside the United States you know all too well how irritating it can be when you’re denied access to streaming services because of your location. Stop missing out and start streaming with Chrome extension Media Hint. So what’s the secret sauce? The extensions routes your traffic–just the traffic for the streaming service–through U.S.-based proxies so you can enjoy content unavailable in your home country. The extension requires no configuration or registration, simply install it and visit Hulu, Netflix, or Pandora to start streaming. Media Hint is a free extension, Chrome only. Media Hint [via Digital Inspiration] 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• Is it better to concentrate on one or two research projects throughout undergrad?

  - by AruniRC

  Currently in the 4th semester of engineering in an Indian university. The thing is - is it better to do as many short-lived projects/research work on diverse topics of computer science or stick to one/two projects consistently throughout my undergraduate years? Case in point: currently working on an image-processing project that promises to carry on for a year or so (as per the prof). Does this seem like being over-specialized at too early a level? Although taking on too many things will spread me out thin and in all probability not end up getting any meaningful work done. Especially as I hope to apply for grad school in the US. Would really appreciate any views and suggestions on this.

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• I removed Ubuntu from the BIOS menu but it comes back.

  - by jimirings

  For reasons too long to explain, I reluctantly removed Ubuntu from my computer. After completely removing it and deleting the partition that it was installed onto, I discovered that I still had two Ubuntu entries in the boot order in my BIOS menu. I deleted them by following the instructions in this answer: http://askubuntu.com/a/63613/54934 As I was doing it, everything appeared to go smoothly. However, upon reboot one of them came back. What's going on here? How do I delete it permanently? I'll gladly provide any other information that may be needed to diagnose the problem. Thanks.

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• Ubuntu 12.10 WiFi Problems

  - by Sean Webber

  I have a 32 bit machine running Ubuntu 12.10 with WiFi on it. I have a WPA2 network at home, but if I leave the USB Adapter plugged in while it boots, it infinitely keeps asking for the network password but never connects. If I plug it in after boot, it will connect but then I can't access ANYTHING on the LAN or Internet because "the DNS servers are unreachable". Now, if I leave the computer on a while, I get lucky sometimes and it MAGICALLY decides to connect for a little bit, lock the machine though and the Internet's gone again. The weirdest thing, is when I am connected but can't get to the internet, I do a netstat or ifconfig wlan0, I do have an IP address and everything. It says I'm connected but its not. I have a Realtek RTL8188CU USB adapter.

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• Problem: Black screen after resume

  - by Robert

  Problem: Black screen after resume I found the below statement that I provided the link for but, no instructions with it for a person that's new to Ubuntu on what exactly to do to fix the problem. Can someone clarify this for me? Thank you. Ubunu 13.10 AMD A6-3420M APU with Radeon(tm) HD Graphics × 4 64bit Toshiba L775 My computer boots to a black screen, what options do I have to fix it? Typical scenario is "use a laptop docked with lid closed, only the external screen is active, suspend, take the laptop, open it somewhere"... which leads to "no screen active". To debug this problem, check if gnome-settings-daemons is getting a signal that the display configuration has changed, by running xtrace against it, and look for a RRScreenChangeNotify event when resuming the machine. If that signal is being sent, then it indicates a possible bug in g-s-d. Otherwise, it suggests a bug in either X or (more likely) the kernel which is not causing the signal to be emitted to begin with.

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• Jumping over non-stationary objects without problems ... 2-D platformer ... how could this be solved? [on hold]

  - by help bonafide pigeons

  You know this problem ... take Super Mario Bros. for example. When Mario/Luigi/etc. comes in proximity with a nearing pipe image an invisible boundary setter must prevent him from continuing forward movement. However, when you jump and move both x and y you are coordinately moving in two dimensions at an exact time. When nearing the pipe in mid-air as you are falling, i.e. implementation of gravity in the computer program "pulling" the image back down, and you do not want them to get "stuck" in both falling and moving. That problem is solved, but how about this one: The player controlling the ball object is attempting to jump and move rightwards over the non-stationary block that moves up and down. How could we measure its top and lower x+y components to determine the safest way for the ball to accurately either fall back down, or catch the ledge, or get pushed down under it, etc.?

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• How to completely turn off session saving?

  - by Thorn

  Hi all, I opened System > Preferences > Startup Application > Options and clicked on Remember currently running Applications. I suppose this makes Ubuntu memorize (save a list on some place in disk) all currently running applications and when you reboot your computer, the OS starts with everything in that list. Now I want to get rid of it. Of course I can close all applications which I do not want to start in startup, and click Remember currently running Applications again, but this doesn't seem to work as expected. For example, Yakuake opens differently if I do that. What I want is to completely turn off session saving. Maybe I can delete the stored information somehow?

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• iTunes 7 can't find iPod in PlayOnLinux using Ubuntu 12.04 Precise?

  - by Endia

  I'm using 12.04 and the latest version of PlayOnLinux to run iTunes 7. I have my iPod 4th gen plugged in and the computer recognizes that it's mounted but it's not showing up in iTunes for me to do anything with it. I know there have been a lot of issues with being able to access your iDevices in iTunes from Linux when you're using a compatibility layer like PlayOnLinux or Wine (both of which I have), so it's recommended that I use Rhythmbox to back up my music etc. Which is fine, because that's part of what I need to do, but my primary need in trying to access my iPod in iTunes is that I need to remove my backup password so that I can jailbreak my iPod with the new Absinthe jailbreak. If there is some other way I can do this without iTunes you know of, I'd love to hear it. If not, what can I do?

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• USB Mouse stutters periodically

  - by greggory.hz

  I'm using an HP dv6000 (not sure of exact model) with a pretty basic Logitech wireless laptop mouse. From time to time, the USB mouse will be very stuttery and less responsive. Not all clicks register and the motion is not smooth. It seems like it's related to the notify-osd coming up when I get an IM or Email or whatever else, but it happens other times as well. It's not the whole computer becoming less responsive, because if I use the touch pad during one of these fits, it works perfectly smooth. I've replaced the batteries in the mouse and have tried different USB ports with better line of sight, etc. I can't figure out what's going on. Any thoughts?

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• What is the history of why bytes are eight bits?

  - by DarenW

  What where the historical forces at work, the tradeoffs to make, in deciding to use groups of eight bits as the fundamental unit ? There were machines, once upon a time, using other word sizes, but today for non-eight-bitness you must look to museum pieces, specialized chips for embedded applications, and DSPs. How did the byte evolve out of the chaos and creativity of the early days of computer design? I can imagine that fewer bits would be ineffective for handling enough data to make computing feasible, while too many would have lead to expensive hardware. Were other influences in play? Why did these forces balance out to eight bits? (BTW, if I could time travel, I'd go back to when the "byte" was declared to be 8 bits, and convince everyone to make it 12 bits, bribing them with some early 21st Century trinkets.)

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• How do I fix this half screen problem?

  - by link1275

  I just installed 12.04, and my entire screen is being displayed entirely on the top half of my screen. The bottom half is always black or some technical garbage from the boot up. To interact with the bottom half of the screen I have to move the mouse over the screen to pull part of the bottom half of the screen on top and vice-versa. Does anyone know how to fix this? Also my computer told me, at startup, to go to here: http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware.

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• Which creative framework can create these games? [closed]

  - by Rahil627

  I've used a few game frameworks in the past and have run into limitations. This lead me to "creative frameworks". I've looked into many, but I cannot determine the limitations of some of them. Selected frameworks ordered from highest to lowest level: Flash, Unity, MonoGame, OpenFrameworks (and Cinder), SFML. I want to be able to: create a game that handles drawing on an iPad create a game that uses computer vision from a webcam create a multi-device iOS game create a game that uses input from Kinect Can all of the frameworks handle this? What is the highest level framework that can handle all of them?

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• issue with vmd install not working any more. lubuntu 12.10

  - by Magpie

  I had vmd working on my lubuntu 64 bit but all of a sudden I was getting errors when I tried to run it. I tried reinstalling it but no joy. The error I now get when I try to run rlwrap: No match. I don't use make unless I have to so I don't know all that much about it. I have removing vmd completely to see if that helped. I tried the suggestions it made (I am sorry, I can't remember the details but it was moaning about CUDA and my graphic drivers for a while. I had not updated it or anything. It was fine until I went away from the computer and came back to it like that. If nobody can help I will try reinstalling my system and see if that helps.

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• Questionable ethics regarding closed source softwares which are supposed to be open source.

  - by edem

  Several days ago I heard a sentence "Cracking company name routers are not a crime.". I asked "Why?" and the guy explained to me that company name used a linux distribution on their routers which source can not be closed because of their license but company name closed it. What do you think about this? Doing otherwise unethical "cracking" becomes ethical, or somewhat neutral if the software in question is "cracked" too? By "cracking" I don't mean breaking into a computer through someones' company name router but "cracking" my own router's OS which otherwise would be unethical.

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• Scammers on the lose pretending to be Microsoft

  - by John Paul Cook

  Minutes ago I received a phone call that the caller ID listed as “Out of area”, which I knew was a bad sign. It was difficult to understand the caller because of his very thick accent. He told me that he was from Microsoft and that my computer was throwing a large number of errors and he was calling to help me. He directed me to use Windows R to open a run dialog box, type eventvwr and then look at the Event Viewer. Within Event Viewer, he instructed me to open Custom Views and then open Administrative...(read more)

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• How to attend one off lectures? [closed]

  - by Senthil Kumaran

  Many times, we come across one-off lectures from famous Computer Scientists. Last year, I came across one by Ms. Barbara Liskov, but I could not go because the University Hall was bit far. Tomorrow, there is one by Dr. Knuth! Now the problem I am facing is, "I don't know much about the material he is going to talk", so I am not sure if I should plan and I fear it will be like going for a "temple". :) What is your advise and general strategy that you have followed whenever you wanted to attend a talk or lecture wherein, it may have been worthwhile if it were an introductory tutorial, but instead you were sitting in an advanced 1 hour lecture by a famous scientist.

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• Ubuntu partition won't display on screen

  - by Danny

  I installed ggobi on my MacBook Pro, and it wasn't working right. I looked up some information, and found this site: Gtk Warning: Cannot open display I followed the vague instructions, but I think I just typed export DISPLAY=:0 directly into my terminal (I'm still in my Mac partition at this point). Fast forward a few days, and I try to go into my Ubuntu partition. It only gives me command line options. I remember my reckless input from a few days back, and I'm certain that it is the issue. My problem is that I have no idea how to get my previous display settings back. My Mac partition seems unaffected, but it'd be nice to get back into my Ubuntu partition. My last resort is completely reverting my computer to my most recent backup before I changed it, but if anyone out there knows how to fix this, I'd greatly appreciate it. Thanks in advance.

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• 12.04 LTE wireless not working in Dell Insprion E1405

  - by Rey

  i have the windows XP media edition running on my Dell Inspiron E1405 with all the hardware working properly. Recently i wipe out the windows and installed the Ubuntu 12.04 LTE using the CD and the installation process completed successfully but my wireless stopped working after. computer wireless indicator turned off and i can't even do the wired connection as well. it is Broadcom BCM4311 adapter. i tried to download the driver from the dell website but they don't have the Linux version of the driver if its that causing the problem. i appreciate your help that can solve my issue. thank you.

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