Modesetting failure with kernel 3.15; ok with kernel 3.14

Kevin Martin ktmdms at
Thu Apr 17 18:29:46 UTC 2014

On 04/17/2014 01:26 PM, Steven Usdansky wrote:
> Not sure where to report this problem (or what I should be looking for), but when booting any of the 3.15 kernels,
> kernel-modesetting fails and X comes up with a resolution of  1024x768, rather than the 1680x1050 resolution specified in my
> xorg.conf file. xorg.conf is necessary because my monitor does not emit a proper EDID.
> ~$ uname -r
> kernel-3.15.0-0.rc1.git1.1.fc21.x86_64
> ~$ lspci | grep 9100
> 02:00.0 VGA compatible controller: NVIDIA Corporation C78 [GeForce 9100] (rev a2)
> Reverting to kernel -3.13.7-200.fc20.x86_64 avoids the problem (and problems I've been having with firefox-28 locking up with 3.14
> kernels).
> --
> RockDoctor
Oh good, I'm not the only one having these problems (modesetting AND firefox lockups).  I find that if I (modprobe nouveau
modeset=1) as root or sudo after logging in from a terminal and before running X I get the proper resolution, but the firefox
lockups are definitely a pain.  I'm on 3.15.0-0.rc0.git9.1.fc21.x86_64.


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