[Nouveau] errors with GeForce GTX 650 Ti and 3 monitors

[Ilia Mirkin]

There were fixes in 3.17 that were supposed to help this, but
apparently they didn't help enough. See
https://bugs.freedesktop.org/show_bug.cgi?id=72180 -- basically some
sort of card setup failure on our part is causing our ctxsw to die,
but nvidia's appears to be more resilient to the screwups.

On Fri, Dec 5, 2014 at 1:16 PM, Rob Jansen <rob.g.jansen at nrl.navy.mil> wrote:
> Well, I downgraded back to 2 monitors and it turns out that this problem has reappeared when using only 2 monitors as well. There must have been a regression of some sort somewhere along the line, possibly in one of the latest kernels? What can I provide to help this issue get fixed?
>
> -Rob
>
>> On Dec 5, 2014, at 8:07 AM, Rob Jansen <rob.g.jansen at nrl.navy.mil> wrote:
>>
>> Hi,
>>
>> Using 3 monitors on the GeForce GTX 650 Ti card (2 DVI and 1 VGA) works great out of the box on Fedora 20. However, every couple of days the graphics driver seems to crash. The same thing used to happen when 2 monitors were in use, but that has pretty much stabilized as of late. Does anyone have a stable setup with this card using 3 monitors? Will 3 monitors be supported?
>>
>> Thanks,
>> Rob
>>
>> $ uname -r
>> 3.17.4-200.fc20.x86_64
>>
>> $ lspci | grep Ti
>> 01:00.0 VGA compatible controller: NVIDIA Corporation GK106 [GeForce GTX 650 Ti] (rev a1)
>>
>> $ dmesg
>> [141447.170973] traps: polkitd[9707] general protection ip:7f383508c022 sp:7fffdd1ac110 error:0 in libmozjs-17.0.so[7f3834f4d000+3b3000]
>> [141869.521246] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ CTXSW_TIMEOUT ]
>> [141869.521258] nouveau E[   PFIFO][0000:01:00.0] PGRAPH engine fault on channel 4, recovering...
>> [142044.384110] nouveau E[Xorg[1058]] failed to idle channel 0xcccc0000 [Xorg[1058]]
>> [142059.381836] nouveau E[Xorg[1058]] failed to idle channel 0xcccc0000 [Xorg[1058]]
>> [142059.381933] nouveau E[   PFIFO][0000:01:00.0] read fault at 0x0000023000 [PTE] from PBDMA0/HOST_CPU on channel 0x007f966000 [unknown]
>> [142074.437553] nouveau E[chrome[2451]] failed to idle channel 0xcccc0000 [chrome[2451]]
>> [142089.435278] nouveau E[chrome[2451]] failed to idle channel 0xcccc0000 [chrome[2451]]
>> [142114.092541] nouveau E[gnome-shell[1916]] failed to idle channel 0xcccc0000 [gnome-shell[1916]]
>> [142129.090266] nouveau E[gnome-shell[1916]] failed to idle channel 0xcccc0000 [gnome-shell[1916]]
>> [142145.229819] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142160.227546] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142175.225272] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142190.222999] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142205.220724] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142220.218450] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>> [142235.216176] nouveau E[gnome-session-c[16010]] failed to idle channel 0xcccc0000 [gnome-session-c[16010]]
>
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