[GTX970] and [GT 710] Display freeze with fifo: fault 01 engine 00 client 0f

Submitted by fariouche@yahoo.fr

Assigned to Nouveau Project

Link to original bug (#107964)

Description

Hello,

I'm facing an annoying crash with nouveau driver when using libreoffice, particularly librecalc, when I try to display a submenu (properties of a cell for example)

The relevant crash lines are:
kernel: nouveau 0000:03:00.0: fifo: fault 01 [WRITE] at 0000000078e02000 engine 00 [GR] client 0f [GPC0/PROP_0] reason 82 [] on channel 2 [103fb01000 X[5295]]
kernel: nouveau 0000:03:00.0: fifo: channel 2: killed
kernel: nouveau 0000:03:00.0: fifo: runlist 0: scheduled for recovery
kernel: nouveau 0000:03:00.0: fifo: engine 0: scheduled for recovery
kernel: nouveau 0000:03:00.0: fifo: engine 7: scheduled for recovery
kernel: nouveau 0000:03:00.0: X[5295]: channel 2 killed!


After this, I can only reboot using the reset button (hard lock up?)

I'm using mesa 18.1.6, xf86-video-nouveau from git,kernel 4.18.8, firmwares 2018-09-13, Dual Monitor (4K p60 + 1080i) gtx970, this is a gentoo distro.

I can help debug if needed, just tell me where/what to investigate.
Unfortunately, I do not have any xorg log since the crash block the system entirely

Thanks
regards