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> Screen resolution not higher 1024x768 after upgrade from SL6.1 to SL6.7
imperfekt
 Posted: Nov 2 2015, 06:06 PM
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Dear all,

I updated my OS today after a long time of about 3 yrs. After the update, the max screen resolution of my computer is fixed at 1024x768 and I have tried a lot of things like adding an xorg.conf file and modifying it but nothing works. Could you please help me fix this issue step by step? All the things I have tried make the reboot hang after loading (I do not get any GUI). Then I always have to through the GRUB and change run level and delete xorg.conf and reboot to get my screen back.

Thanks in Advance!
Best,

Barry
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toracat
 Posted: Nov 2 2015, 09:16 PM
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What is your graphics device? Which driver are you using? Please run this command:

lspci -vnn

and show us the output related to the VGA-related section.

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ELRepo: repository specializing in hardware support for EL
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imperfekt
 Posted: Nov 3 2015, 12:01 AM
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Thank you very much for a reply. Here is the output on running this command.
------------------------------------------------------
$ lspci -vnn | grep VGA
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT218 [GeForce 8400 GS Rev. 3] [10de:10c3] (rev a2) (prog-if 00 [VGA controller])
------------------------------------------------------

The total output on doing
$ lspci -vnn

is here: http://pastebin.com/arkiNhte

Another something if it helps:
-----------------------------------------------------
$ dmesg | grep NVIDIA
nvidia: module license 'NVIDIA' taints kernel.
NVRM: The NVIDIA GeForce 8400GS GPU installed in this system is
NVRM: supported through the NVIDIA 340.xx Legacy drivers. Please
NVRM: information. The 346.35 NVIDIA driver will ignore
NVRM: No NVIDIA graphics adapter found!
NVRM: NVIDIA init module failed!
------------------------------------------------------
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toracat
 Posted: Nov 3 2015, 01:13 AM
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I now see that you have previously installed the kmod-nvidia package from ELRepo. As seen in the message you copied, you now need the legacy version for your card.

The best way to proceed is to install nvidia-detect and confirm the version to install. Please see the link for more details. Be sure to uninstall the existing version before installing the one you need.

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ELRepo: repository specializing in hardware support for EL
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imperfekt
 Posted: Nov 3 2015, 10:43 AM
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Actually I had followed the correct process but attempted at installing the wrong driver earlier. It works like a dream now. Thank you very much. This thread shows the total correct process:
http://scientificlinuxforum.org/index.php?showtopic=15
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