[Nouveau] [Bug 50121] [Regression] Since kernel v3.5 several cards fail to resume, introduced by: 'convert to exec engine, and improve channel sync'

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50121

--- Comment #72 from Mr-4 <mr.dash.four at googlemail.com> ---
Things have been pretty stable with 3.8.1, but it is getting a bit "twitchy"
with 3.8.7 - on two separate occasions I've got the following error on restore:

kernel: nouveau  [     DRM] re-enabling device...
kernel: nouveau  [     DRM] resuming client object trees...
kernel: nouveau  [   VBIOS][0000:01:00.0] running init tables
kernel: nouveau  [     DRM] resuming display...
kernel: nouveau W[   PFIFO][0000:01:00.0] unknown intr 0x00010000, ch 0
kernel: nouveau W[   PFIFO][0000:01:00.0] unknown intr 0x00010000, ch 0
kernel: nouveau W[   PFIFO][0000:01:00.0] unknown intr 0x00010000, ch 0
[...]
kernel: nouveau E[   PFIFO][0000:01:00.0] still angry after 101 spins, halt
kernel: nouveau  [     DRM] 0xD3FB: Parsing digital output script table
kernel: nouveau  [     DRM] Setting dpms mode 3 on TV encoder (output 3)
kernel: nouveau  [     DRM] 0xD3FB: Parsing digital output script table


at which point the whole screen starts with the now-familiar black-and-white
rectangles and I have no option, but to reboot.

The above error does not happen very often - maybe every 8-10 hibernate/resume
cycles, but with the 3.8.1. kernel I didn't have any errors at all.

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