Add a file to /etc/X11/xorg.conf.d, named anything-you-want.conf, which contains

Section "Device"
  Driver "modesetting"
EndSection

Hopefully that should do it.

On Tue, Aug 11, 2015 at 6:03 PM, Rudolf Künzli <rudolf.kun...@gmail.com> wrote:
> I don't have a file /etc/X11/xorg.conf but a folder
> /etc/X11/xorg.conf.d
>
> [rudolf@mephisto xorg.conf.d]$ ls -la /etc/X11/xorg.conf.d
> total 12
> drwxr-xr-x. 2 root root 4096 Aug  4 08:25 .
> drwxr-xr-x. 6 root root 4096 May 27 11:40 ..
> -rw-r--r--. 1 root root  265 Apr 21 17:06 00-keyboard.conf
>
> Then a folder /usr/share/X11/xorg.conf.d with serveral config files but
> I don't see which one to be edited...
>
> [rudolf@mephisto xorg.conf.d]$ ls -la /usr/share/X11/xorg.conf.d
> total 32
> drwxr-xr-x. 2 root root 4096 Jul 31 18:33 .
> drwxr-xr-x. 7 root root 4096 May 27 11:40 ..
> -rw-r--r--. 1 root root 1099 Jul 15 10:20 10-evdev.conf
> -rw-r--r--. 1 root root 1350 Jul 15 10:20 10-quirks.conf
> -rw-r--r--. 1 root root 2827 May  1 08:23 50-synaptics.conf
> -rw-r--r--. 1 root root  115 May 15 14:49 50-vmmouse.conf
> -rw-r--r--. 1 root root 1385 Mar 20 00:31 50-wacom.conf
> -rw-r--r--. 1 root root  789 Jul 13 00:54 90-libinput.conf
>
> Any other place to look for. find didn't help...
>
> I guess I'll have to run "x config" as root to get a xorg.conf which I
> can edit later...
>
> --
> Rudolf Künzli <rudolf.kun...@gmail.com>
> On Tue, 2015-08-11 at 11:42 -0400, Ilia Mirkin wrote:
>> No, you probably want something in /etc/X11... a lot of the time it's
>> split up into a bunch of separate files in like /etc/X11/xorg.conf.d
>> or something. You should consult your distro documentation for how to
>> make it happen.
>>
>> On Tue, Aug 11, 2015 at 11:38 AM, Rudolf Künzli <
>> rudolf.kun...@gmail.com> wrote:
>> > Thanks - the only xorg.conf I found is -
>> >  /usr/share/abrt/conf.d/plugins/xorg.conf
>> > Is this the file to be edited?
>> >
>> > --
>> > Rudolf Künzli <rudolf.kun...@gmail.com>
>> > On Tue, 2015-08-11 at 10:56 -0400, Ilia Mirkin wrote:
>> > > On Tue, Aug 11, 2015 at 10:47 AM, Rudolf Künzli <
>> > > rudolf.kun...@gmail.com> wrote:
>> > > > > GeForce GTX 745 is a NVIDIA card in the NV117 (GM107)
>> > > > > Family...
>> > > > The update was made using DNF (Yum) in my daily update
>> > > > procedure
>> > > > using
>> > > > the Fedora 22 Update repository.
>> > > > I am not familiar with details I just can report what happens
>> > > > right
>> > > > now...
>> > >
>> > > OK, there's no EXA support for maxwell, so you're using glamor.
>> > > Before
>> > > kernel 4.1, unless you had extracted your own ctxsw firmware, you
>> > > didn't have acceleration at all, that was likely the change that
>> > > triggered the issue.
>> > >
>> > > The glamor integration in nouveau is, sadly, broken. But it's
>> > > unclear
>> > > whether that's the cause of your issue. You can either add
>> > >
>> > > Option "NoAccel" "true"
>> > >
>> > > to the device section in your xorg.conf, which will disable 2d
>> > > acceleration and bring you back to the same state you were in
>> > > before,
>> > > or you can add
>> > >
>> > > Driver "modesetting"
>> > >
>> > > (or uninstall xf86-video-nouveau) which will use the modesetting
>> > > driver which has a non-broken glamor integration. You may still
>> > > get
>> > > the same issues though, as they could just be generic
>> > > mesa-sucks-on-maxwell issues (I don't have a Maxwell GPU, no one
>> > > else
>> > > has been interested in debugging/fixing issues).
>> > >
>> > >   -ilia
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