affects me too on debian scratch/sid. all the "fixes" from google appear to be disable nouveau (nomodeset) and install the proprietary drivers, which isn't helpful.
i can still ssh into the box, but anything that was running a gui has crashed (defunct), here's some output i got in dmesg: [116651.047961] nouveau E[gnome-shell[1436]] multiple instances of buffer 256 on validation list [116651.047965] nouveau E[gnome-shell[1436]] validate_init [116651.047966] nouveau E[gnome-shell[1436]] validate: -22 [116691.791976] nouveau E[ PFIFO][0000:01:00.0] write fault at 0x000a420000 [PAGE_NOT_PRESENT] from PGRAPH/GPC0/PROP on channel 0x007f9ee000 [gnome-shell[1436]] [116691.791980] nouveau E[ PFIFO][0000:01:00.0] PGRAPH engine fault on channel 5, recovering... [116758.244902] nouveau E[ DRM] GPU lockup - switching to software fbcon [116773.237541] nouveau E[Xorg[1023]] failed to idle channel 0xcccc0000 [Xorg[1023]] [116788.222848] nouveau E[Xorg[1023]] failed to idle channel 0xcccc0000 [Xorg[1023]] [116788.222899] [sched_delayed] sched: RT throttling activated [116788.223033] nouveau E[ PFIFO][0000:01:00.0] read fault at 0x000001b000 [PAGE_NOT_PRESENT] from PFIFO/BAR_READ on channel 0x007fb5e000 [unknown] [116803.328066] nouveau E[gnome-shell[1436]] failed to idle channel 0xcccc0000 [gnome-shell[1436]] [116818.313425] nouveau E[gnome-shell[1436]] failed to idle channel 0xcccc0000 [gnome-shell[1436]] things that seem to trigger it are screensaver and google chrome, but that could be coinsidence. -- 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/1291574 Title: nouveau DRM GPU lockup, PFIFO unhandled status 0x00800000 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1291574/+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
