F11: Why is Xorg failing to allow 1600x1200 resolutions?

[Daniel B. Thurman]

On 08/24/2009 11:59 AM, James Wilkinson wrote:
> Daniel B. Thurman wrote:
>    
>> On F8/9/10, I was able to drop in my xorg.conf
>> file into /etc/X11 directory and was able to get
>> the X display to recognize the Monitor type and
>> get 1600x1200 resolution, but for some reason,
>> I am not able to do this with F11.
>>
>> My montor is a Hitachi CM715, and my onboard
>> video is an Intel 82945G/GZ Integrated graphics
>> controller.
>>
>> I have tried system-config-display&  it seems
>> to limit my resolution to 1280x1024.
>>
>> How can I resolve this problem?
>>      
> This is probably because you’ve got kernel mode-setting turned on. The
> graphics mode setting (including the resolution) happens very early on
> in the boot sequence, before / is mounted. So it can’t read your
> xorg.conf file.
>
> I’m in a very similar situation, and filed
> https://bugzilla.redhat.com/show_bug.cgi?id=512602 over a month ago.
>
> For the time being, live with 1280x1024 or put nomodeset into the kernel
> command line (in grub) – unless anyone knows of a way of configuring KMS
> resolution from within grub?
>
> Hope this helps,
>
> James.
>    
Yup!  That worked for me!

I now have the full resolutions!

  -- On F11 with kernel arg: nomodeset
===========================================
# xrandr -q
Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 1600 x 1600
VGA connected 1600x1200+0+0 (normal left inverted right x axis y axis) 
360mm x 270mm
    1600x1200      75.0*+   70.0
    1280x1024      85.0     75.0
    1280x960       85.0
    1152x864       75.0
    1024x768       85.0     75.0     70.1     60.0     43.5
    832x624        74.6
    800x600        85.1     72.2     75.0     60.3     56.2
    640x480        85.0     75.0     72.8     66.7     59.9
    720x400        87.8     70.1

So it seems there is a bug for sure!

Thanks!
Dan