Public bug reported: 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 ** Affects: xserver-xorg-video-nouveau (Ubuntu) Importance: Undecided Status: New ** Attachment added: "Logs and dmsg output" https://bugs.launchpad.net/bugs/1578715/+attachment/4656540/+files/ubuntu_bug.tar.gz -- You received this bug notification because you are a member of Ubuntu-X, 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 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/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
