[CentOS] Can't get resolution higher than 1280x1024 - Centos 5

[Bob Chiodini]

Paul wrote:
> On Mon, April 30, 2007 11:04 pm, Jim Perrin wrote:
>   
>> On 4/30/07, Paul <unix at bikesn4x4s.com> wrote:
>>     
>>> Hello all, I can't get higher than 1280x1024 resolution (60hz, 24
>>> depth).
>>> I'm running Centos 5 x86 64bit on AMD Athlon64 x2 4600, Geforce 6200 PCI
>>> express.
>>>       
>> What monitor do you have?
>>     
>
> Samsung SyncMaster 204t (1600x1200 native) and
> Nvidia GeForce 6200 Turbo (Even higher)
>
> I run a few boxes on KVM switch and they all run fine on 1600x1200. 
> Centos 4 never had a problem
>
>   
>>> I am guessin the kernel does not support my combo?
>>>       
>> No, it should work just fine. you'll only get 2D support without the
>> proprietary driver from nvidia though.
>>
>>     
>>> I've also tried Nvidia's  driver from their site, this is what I get:
>>>       
>>  <snip boring junk>
>>
>> You don't have the appropriate kernel-devel package installed (yum
>> install kernel-devel) and you'll want to install gcc also if you don't
>> have it already.
>>     
>
> I've just installed kernel-devel and still same thing.  I've got gcc.  ;(
>   
Paul,

You might try forcing the horizontal and vertical refresh rates in 
xorg.conf, in the monitor section, ala:
HorizSync  30-81
VertRefresh 56-75

This might require DPMS to be set to off.  See man xorg.conf.

Bob...