Ubuntu 14.04 LTS screen freezing frequently

Question

I'm brand new to Linux and am having a very hard time troubleshooting this problem. My screen is freezing frequently .

Here is my machine specs:

Intel Core 2 duo E8400 3Ghz,
5Gb RAM,
Ubuntu 14.04 x64
Intel Graphics

Output of sudo lshw -c video as requested by Fabby

Only the screen? Or the entire computer? (After tapping the off-switch on your computer for <2 seconds, does it still switch off within a few minutes?) — Fabby, Nov 18 '15 at 23:12
the whole system is freezing, even when i want to change displays it said a unknown device, so i think its a problem with graphic device — Abdou Tahiri, Nov 19 '15 at 09:09
Please help us help you: does the computer still shut down when you press the power off switch for less then 2 seconds? — Fabby, Nov 19 '15 at 09:47
You've got 2 video controllers: can you disable one of them in the BIOS or physically remove it from the machine??? — Fabby, Nov 19 '15 at 16:44

xiaodongjie · Accepted Answer · 2015-11-23T11:18:46.863

Perhaps X server may choose incorrect driver for your computer.

If the current version of Xorg that you use supports your computer, you need to try manually change the driver via a file, /etc/X11/xorg.conf.d/xorg.conf. This file describes Xorg server configurations.

Please create the xorg.conf file with following contents.

Section "Device"
    Identifier "Configured Video Device"
    Driver "vesa"
EndSection

And then you can reboot so check your screen again.

If it's failed, you can modify "vesa" to "fbdev" or "intel" at xorg.conf and then retry.

Why do I recommend vesa, fbdev, intel? Because they are compatible drivers for the Intel graphics card.

In other case, X driver may be updated. So you may need to run

apt-get update
apt-get upgrade

And then reboot again. Also, you can check that your PC is certificated by Ubuntu Desktop with following url. http://www.ubuntu.com/certification/desktop/ At there, you can lookup for your PC.

Note:

If you use vesa and fbdev, direct dendering may be disabled.

If you still cannot solve your problem, please visit

https://launchpad.net/xorg

and report this problem as a bug. Xorg developers will offer more technical support.

As normally, the X run on tty7. If X crashed or could not reply with black screen, you can switch to the tty1~6 with Ctrl + Alt + 1~6. And there are many text editors in Ubuntu like nano, vim and so on.

Also there are some solutions that may help you due to visit following urls. http://ubuntuforums.org/showthread.php?t=935756 https://wiki.ubuntu.com/X/Troubleshooting/Freeze

Ubuntu 14.04 LTS screen freezing frequently

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