kworker blocked: nv50_disp_atomic_commit_work

[David R. Hedges]

There's a moderate chance this is a duplicate of #1723245, but the lead-up to the hang was different: I noticed some visual artifacting (perhaps isolated to my Chromium window, but I don't remember for sure). I could still move the mouse, and tried closing the current tab. Shortly thereafter, the UI entirely stopped responding, but SSH was fine. The syslog contained recent messages like this:

 [535575.990974] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff534000 compiz[3891]]
 [535575.990985] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000000 [] warp 3f0009 [ILLEGAL_INSTR_ENCODING]
 [535575.991008] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff534000 compiz[3891]]
 [535575.991016] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004 [MULTIPLE_WARP_ERRORS] warp 2000d [OOR_REG]
 [535575.991028] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff534000 compiz[3891]]
...
 [535575.992504] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff534000 compiz[3891]]
 [535575.992511] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004 [MULTIPLE_WARP_ERRORS] warp 2000d [OOR_REG]
 [535575.992522] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff534000 compiz[3891]]
 [535575.992530] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004 [MULTIPLE_WARP_ERRORS] warp 3000d [OOR_REG]
 [535671.523894] nouveau 0000:01:00.0: fifo: read fault at 0002645000 engine 00 [GR] client 08 [GPC0/PE_2] reason 02 [PTE] on channel 7 [00ff3af000 chromium-browse[9166]]
 [535671.523900] nouveau 0000:01:00.0: fifo: gr engine fault on channel 7, recovering...
 [535692.272677] [drm:drm_atomic_helper_swap_state [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535702.512751] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535712.752833] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] flip_done timed out
 [535818.481524] [drm:drm_atomic_helper_swap_state [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535828.721587] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535838.961655] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] flip_done timed out
 [535849.201726] [drm:drm_atomic_helper_swap_state [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535859.441805] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535869.681862] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] flip_done timed out
 [535879.921931] [drm:drm_atomic_helper_swap_state [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535890.162005] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:37:head-0] hw_done timed out
 [535895.282173] INFO: task kworker/u24:8:30368 blocked for more than 120 seconds.
 [535895.282178] Not tainted 4.10.0-35-generic #39-Ubuntu
 [535895.282179] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 [535895.282181] kworker/u24:8 D 0 30368 2 0x00000000
 [535895.282222] Workqueue: events_unbound nv50_disp_atomic_commit_work [nouveau]
 [535895.282223] Call Trace:
 [535895.282229] __schedule+0x233/0x6f0
 [535895.282251] ? nvkm_ioctl_ntfy_get+0x67/0xb0 [nouveau]
 [535895.282322] schedule+0x36/0x80
 [535895.282324] schedule_timeout+0x22a/0x3f0
 [535895.282353] ? nvkm_client_ioctl+0x12/0x20 [nouveau]
 [535895.282373] ? nvif_object_ioctl+0x41/0x50 [nouveau]
 [535895.282405] ? nouveau_bo_rd32+0x2a/0x30 [nouveau]
 [535895.282432] ? nv84_fence_read+0x2e/0x30 [nouveau]
 [535895.282434] dma_fence_default_wait+0x1c8/0x250
 [535895.282435] ? dma_fence_free+0x20/0x20
 [535895.282436] dma_fence_wait_timeout+0x39/0xf0
 [535895.282446] drm_atomic_helper_wait_for_fences+0x48/0x120 [drm_kms_helper]
 [535895.282472] nv50_disp_atomic_commit_tail+0x55/0x3820 [nouveau]
 [535895.282475] ? __switch_to+0x23c/0x520
 [535895.282502] nv50_disp_atomic_commit_work+0x12/0x20 [nouveau]
 [535895.282504] process_one_work+0x1fc/0x4b0
 [535895.282506] worker_thread+0x4b/0x500
 [535895.282508] kthread+0x109/0x140
 [535895.282509] ? process_one_work+0x4b0/0x4b0
 [535895.282511] ? kthread_create_on_node+0x60/0x60
 [535895.282513] ret_from_fork+0x2c/0x40

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: xserver-xorg-video-nouveau 1:1.0.14-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-35.39-generic 4.10.17
Uname: Linux 4.10.0-35-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: amd64
BootLog:

CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Tue Oct 10 16:40:51 2017
DistUpgraded: 2017-06-09 12:39:15,077 DEBUG icon theme changed, re-reading
DistroCodename: zesty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 NVIDIA Corporation GK104 [GeForce GTX 770] [10de:1184] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd GK104 [GeForce GTX 770] [1458:3606]
InstallationDate: Installed on 2016-10-24 (350 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
MachineType: System manufacturer System Product Name
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.10.0-35-generic.efi.signed root=UUID=311cc681-166d-47bd-847d-f41c81578c1a ro rootflags=subvol=@ quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: Upgraded to zesty on 2017-06-09 (123 days ago)
dmi.bios.date: 05/06/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4701
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P9X79
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4701:bd05/06/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP9X79:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.13.1+17.04.20170109-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.7-0ubuntu0.17.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.7-0ubuntu0.17.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu1.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.14-0ubuntu1
xserver.bootTime: Wed Oct 4 11:21:30 2017
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.3-1ubuntu1.1
xserver.video_driver: nouveau