Ubuntu
xserver-xorg-video-nouveau package

  1. Bug #921321
  2. Comment #67

Comment 67 for bug 921321

Revision history for this message
In , Erik Karlsson (pilo) wrote :

I got the patch working in 4.9.6. But in 4.17.3 the backlight controls no longer work after suspend.

Wierdly though, the "nvapeek" output is the same after suspend as before:
# nvapeek 0xe100; nvapeek 0xe28c; nvapeek 0xe104 8; nvapeek 0xe280 8
0000e100: 001c1100
0000e28c: 00000180
0000e104: 72266640 0441474b
0000e280: 24444747 00000000
...suspend...
# nvapeek 0xe100; nvapeek 0xe28c; nvapeek 0xe104 8; nvapeek 0xe280 8
0000e100: 001c1100
0000e28c: 00000180
0000e104: 72266240 0441474b
0000e280: 24444747 00000000

Something else has changed. Will bisect.