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Old 02-17-2014, 12:15 PM   #1
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Registered: Jan 2014
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CentOS 6.5 Video Issues

Howdy all. I have spent days now trying to find some help with my newly installed Centos 6.5 and nvidia drivers. I have the machine currently booted to init3. I have followed many of the great guides here like this

I have nouveau disabled, lspci|grep vga shows the nvidia but if I do an init5 , my monitor goes into “upsupported mode” and I never see anything again and I am forced to hit the reset button on my box. What logs can I look at to see what’s failing? Or maybe some hints as to what I might have missed. Before I messed with this, I was in the default 1024x786.

Old 02-17-2014, 01:26 PM   #2
John VV
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Registered: Aug 2005
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i take it you have not read the cent wiki or the Redhat RHEL 6 docs

centos6 NOW uses the RHEL6 docs on the redhat site

the Nouveau driver is / WAS already installed

now there is a kmod-nvidia.rpm in the ( i believe epel repo)
see the wiki on installing thirdparty repos

if you are trying to use the NVIDIA driver
you have to MANUALLY do a bunch of things
like REBUILD THE BOOT IMAGE after you uninstall the nouveau driver

switching drivers is NOT a "point and click" thing
unless it is the repo way using the kmod-nvidia or better yet the akmod-nvidia

if you replace the nouveau driver with the or kmod-nvidia the plymouth boot screen WILL BE DISABLED !!!
it will fall back to the 3 tone two tone blue and white bar on the bottom of the screen
and you might have to add a vga line to the boot line in the grub.conf

Last edited by John VV; 02-17-2014 at 01:29 PM.
Old 02-17-2014, 03:43 PM   #3
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Registered: Jan 2014
Posts: 5

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As a matter of fact I have spent /wasted many hours trying both methods resulting in a CLI host that won’t display any form of X. I made the default boot to init3 so I could mess with things. If I don’t, the host will boot, then my monitor blacks out and flashes unsupported mode and a reset switch is required. Just before its tried to load X, I see a warning flash by but it’s so fast I can’t capture it and its lost. Where would gnome send warning for init level 5 messages?
Old 02-17-2014, 04:02 PM   #4
John VV
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Registered: Aug 2005
Posts: 16,264

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you might have to reinstall , depending on just how mangaled things are but
here is the SL6 guide
just use the centos reops
see the wiki
and install the elrepo repo

BUT !!!!!
if you are trying to use the .run
you MUST !!!!!
100% MUST !!!!!!
rebuild the boot image after you uninstall the nouveau driver and BEFORE!!!!!!!!!!! you try to install the
( and ALL of that must be done in a text only boot )
see the script i posted here

the .run driver will NOT install if the nouveau is STILL in the boot image

Also you have to have installed already
gcc and the kernel-devel rpms
su -
yum groupinstall "Development Tools" 
yum install kernel-devel
using the kmod-nvidia is a LOT easier

Last edited by John VV; 02-17-2014 at 04:09 PM.


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