I have the same issue. May 25 10:12:26 jundurraga-sydney kernel: [166153.699295] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:30 jundurraga-sydney kernel: [166157.993822] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:34 jundurraga-sydney kernel: [166162.288345] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:38 jundurraga-sydney kernel: [166166.582867] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:43 jundurraga-sydney kernel: [166170.877336] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:47 jundurraga-sydney kernel: [166175.171855] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:51 jundurraga-sydney kernel: [166179.466351] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:12:56 jundurraga-sydney kernel: [166183.760890] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:13:00 jundurraga-sydney kernel: [166188.055410] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:13:04 jundurraga-sydney kernel: [166192.349909] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:13:08 jundurraga-sydney kernel: [166196.644426] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 25 10:13:13 jundurraga-sydney kernel: [166200.938946] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1578715 Title: Blank screen after computer locks for long time Status in xserver-xorg-video-nouveau package in Ubuntu: New Bug description: After my computer is locked for a long time, I am unable to get back to the unlock screen, nor can I get to the virtual terminals. I suspect this is an issue with nouveau, as kern.log has the lines: May 4 20:06:15 paul-OptiPlex-9020-citp kernel: [32188.115554] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 4 20:06:15 paul-OptiPlex-9020-citp kernel: [32188.115559] nouveau 0000:01:00.0: fifo: sw engine fault on channel 2, recovering... May 4 20:06:17 paul-OptiPlex-9020-citp kernel: [32190.115160] nouveau 0000:01:00.0: fifo: runlist 0 update timeout May 4 20:06:19 paul-OptiPlex-9020-citp kernel: [32192.410337] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] May 4 20:06:23 paul-OptiPlex-9020-citp kernel: [32196.705111] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] with the last line repeated many times. Bugs I found with similar error messages: https://bugs.freedesktop.org/show_bug.cgi?id=90453 https://bugs.freedesktop.org/show_bug.cgi?id=72180 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1578715/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
