Hello! I'm writing to report a crash in the QXL / DRM code in the Linux kernel. I originally filed the issue on LaunchPad and more details can be found there, although I doubt whether these details are useful. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813620 I first experienced these issues with: * Ubuntu 18.04 (probably kernel 4.15.something) * Ubuntu 18.10 (kernel 4.18.0-13) * Ubuntu 19.04 (kernel 5.0.0-13-generic) * Ubuntu 19.04 (mainline kernel 5.1-rc7) * Ubuntu 19.04 (mainline kernel 5.2.0-050200rc1-generic) Here is the crash output from dmesg: [354073.713350] INFO: task Xorg:920 blocked for more than 120 seconds. [354073.717755] Not tainted 5.2.0-050200rc1-generic #201905191930 [354073.722277] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354073.738332] Xorg D 0 920 854 0x00404004 [354073.738334] Call Trace: [354073.738340] __schedule+0x2ba/0x650 [354073.738342] schedule+0x2d/0x90 [354073.738343] schedule_preempt_disabled+0xe/0x10 [354073.738345] __ww_mutex_lock.isra.11+0x3e0/0x750 [354073.738346] __ww_mutex_lock_slowpath+0x16/0x20 [354073.738347] ww_mutex_lock+0x34/0x50 [354073.738352] ttm_eu_reserve_buffers+0x1f9/0x2e0 [ttm] [354073.738356] qxl_release_reserve_list+0x67/0x150 [qxl] [354073.738358] ? qxl_bo_pin+0xaa/0x190 [qxl] [354073.738359] qxl_cursor_atomic_update+0x1b0/0x2e0 [qxl] [354073.738367] drm_atomic_helper_commit_planes+0xb9/0x220 [drm_kms_helper] [354073.738371] drm_atomic_helper_commit_tail+0x2b/0x70 [drm_kms_helper] [354073.738374] commit_tail+0x67/0x70 [drm_kms_helper] [354073.738378] drm_atomic_helper_commit+0x113/0x120 [drm_kms_helper] [354073.738390] drm_atomic_commit+0x4a/0x50 [drm] [354073.738394] drm_atomic_helper_update_plane+0xe9/0x100 [drm_kms_helper] [354073.738402] __setplane_atomic+0xd3/0x120 [drm] [354073.738410] drm_mode_cursor_universal+0x142/0x270 [drm] [354073.738418] drm_mode_cursor_common+0xcb/0x220 [drm] [354073.738425] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354073.738432] drm_mode_cursor2_ioctl+0xe/0x10 [drm] [354073.738438] drm_ioctl_kernel+0xb0/0x100 [drm] [354073.738440] ? ___sys_recvmsg+0x16c/0x200 [354073.738445] drm_ioctl+0x233/0x410 [drm] [354073.738452] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354073.738454] ? timerqueue_add+0x57/0x90 [354073.738456] ? enqueue_hrtimer+0x3c/0x90 [354073.738458] do_vfs_ioctl+0xa9/0x640 [354073.738459] ? fput+0x13/0x20 [354073.738461] ? __sys_recvmsg+0x88/0xa0 [354073.738462] ksys_ioctl+0x67/0x90 [354073.738463] __x64_sys_ioctl+0x1a/0x20 [354073.738465] do_syscall_64+0x5a/0x140 [354073.738467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [354073.738468] RIP: 0033:0x7ffad14d3417 [354073.738472] Code: Bad RIP value. [354073.738472] RSP: 002b:00007ffdd5679978 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [354073.738473] RAX: ffffffffffffffda RBX: 000056428a474610 RCX: 00007ffad14d3417 [354073.738474] RDX: 00007ffdd56799b0 RSI: 00000000c02464bb RDI: 000000000000000e [354073.738474] RBP: 00007ffdd56799b0 R08: 0000000000000040 R09: 0000000000000010 [354073.738475] R10: 000000000000003f R11: 0000000000003246 R12: 00000000c02464bb [354073.738475] R13: 000000000000000e R14: 0000000000000000 R15: 000056428a4721d0 [354073.738511] INFO: task kworker/1:0:27625 blocked for more than 120 seconds. [354073.745154] Not tainted 5.2.0-050200rc1-generic #201905191930 [354073.751900] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354073.762197] kworker/1:0 D 0 27625 2 0x80004000 [354073.762205] Workqueue: events qxl_client_monitors_config_work_func [qxl] [354073.762206] Call Trace: [354073.762211] __schedule+0x2ba/0x650 [354073.762214] schedule+0x2d/0x90 [354073.762215] schedule_preempt_disabled+0xe/0x10 [354073.762216] __ww_mutex_lock.isra.11+0x3e0/0x750 [354073.762217] ? __switch_to_asm+0x34/0x70 [354073.762218] ? __switch_to_asm+0x40/0x70 [354073.762219] ? __switch_to_asm+0x40/0x70 [354073.762220] __ww_mutex_lock_slowpath+0x16/0x20 [354073.762221] ww_mutex_lock+0x34/0x50 [354073.762235] drm_modeset_lock+0x35/0xb0 [drm] [354073.762243] drm_modeset_lock_all_ctx+0x5d/0xe0 [drm] [354073.762251] drm_modeset_lock_all+0x5e/0xb0 [drm] [354073.762252] qxl_display_read_client_monitors_config+0x1e1/0x370 [qxl] [354073.762254] qxl_client_monitors_config_work_func+0x15/0x20 [qxl] [354073.762256] process_one_work+0x20f/0x410 [354073.762257] worker_thread+0x34/0x400 [354073.762259] kthread+0x120/0x140 [354073.762260] ? process_one_work+0x410/0x410 [354073.762261] ? __kthread_parkme+0x70/0x70 [354073.762262] ret_from_fork+0x35/0x40 [354194.557095] INFO: task Xorg:920 blocked for more than 241 seconds. [354194.558311] Not tainted 5.2.0-050200rc1-generic #201905191930 [354194.559484] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354194.560936] Xorg D 0 920 854 0x00404004 [354194.560938] Call Trace: [354194.560944] __schedule+0x2ba/0x650 [354194.560946] schedule+0x2d/0x90 [354194.560947] schedule_preempt_disabled+0xe/0x10 [354194.560948] __ww_mutex_lock.isra.11+0x3e0/0x750 [354194.560950] __ww_mutex_lock_slowpath+0x16/0x20 [354194.560950] ww_mutex_lock+0x34/0x50 [354194.560956] ttm_eu_reserve_buffers+0x1f9/0x2e0 [ttm] [354194.560959] qxl_release_reserve_list+0x67/0x150 [qxl] [354194.560961] ? qxl_bo_pin+0xaa/0x190 [qxl] [354194.560963] qxl_cursor_atomic_update+0x1b0/0x2e0 [qxl] [354194.560971] drm_atomic_helper_commit_planes+0xb9/0x220 [drm_kms_helper] [354194.560975] drm_atomic_helper_commit_tail+0x2b/0x70 [drm_kms_helper] [354194.560979] commit_tail+0x67/0x70 [drm_kms_helper] [354194.560982] drm_atomic_helper_commit+0x113/0x120 [drm_kms_helper] [354194.560993] drm_atomic_commit+0x4a/0x50 [drm] [354194.560997] drm_atomic_helper_update_plane+0xe9/0x100 [drm_kms_helper] [354194.561011] __setplane_atomic+0xd3/0x120 [drm] [354194.561019] drm_mode_cursor_universal+0x142/0x270 [drm] [354194.561027] drm_mode_cursor_common+0xcb/0x220 [drm] [354194.561034] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354194.561041] drm_mode_cursor2_ioctl+0xe/0x10 [drm] [354194.561047] drm_ioctl_kernel+0xb0/0x100 [drm] [354194.561049] ? ___sys_recvmsg+0x16c/0x200 [354194.561057] drm_ioctl+0x233/0x410 [drm] [354194.561080] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354194.561082] ? timerqueue_add+0x57/0x90 [354194.561084] ? enqueue_hrtimer+0x3c/0x90 [354194.561086] do_vfs_ioctl+0xa9/0x640 [354194.561088] ? fput+0x13/0x20 [354194.561089] ? __sys_recvmsg+0x88/0xa0 [354194.561090] ksys_ioctl+0x67/0x90 [354194.561091] __x64_sys_ioctl+0x1a/0x20 [354194.561093] do_syscall_64+0x5a/0x140 [354194.561094] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [354194.561096] RIP: 0033:0x7ffad14d3417 [354194.561100] Code: Bad RIP value. [354194.561100] RSP: 002b:00007ffdd5679978 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [354194.561101] RAX: ffffffffffffffda RBX: 000056428a474610 RCX: 00007ffad14d3417 [354194.561102] RDX: 00007ffdd56799b0 RSI: 00000000c02464bb RDI: 000000000000000e [354194.561102] RBP: 00007ffdd56799b0 R08: 0000000000000040 R09: 0000000000000010 [354194.561103] R10: 000000000000003f R11: 0000000000003246 R12: 00000000c02464bb [354194.561103] R13: 000000000000000e R14: 0000000000000000 R15: 000056428a4721d0 [354194.561163] INFO: task kworker/1:0:27625 blocked for more than 241 seconds. [354194.562474] Not tainted 5.2.0-050200rc1-generic #201905191930 [354194.563994] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354194.565474] kworker/1:0 D 0 27625 2 0x80004000 [354194.565479] Workqueue: events qxl_client_monitors_config_work_func [qxl] [354194.565480] Call Trace: [354194.565483] __schedule+0x2ba/0x650 [354194.565484] schedule+0x2d/0x90 [354194.565486] schedule_preempt_disabled+0xe/0x10 [354194.565486] __ww_mutex_lock.isra.11+0x3e0/0x750 [354194.565488] ? __switch_to_asm+0x34/0x70 [354194.565489] ? __switch_to_asm+0x40/0x70 [354194.565490] ? __switch_to_asm+0x40/0x70 [354194.565490] __ww_mutex_lock_slowpath+0x16/0x20 [354194.565491] ww_mutex_lock+0x34/0x50 [354194.565499] drm_modeset_lock+0x35/0xb0 [drm] [354194.565507] drm_modeset_lock_all_ctx+0x5d/0xe0 [drm] [354194.565514] drm_modeset_lock_all+0x5e/0xb0 [drm] [354194.565516] qxl_display_read_client_monitors_config+0x1e1/0x370 [qxl] [354194.565518] qxl_client_monitors_config_work_func+0x15/0x20 [qxl] [354194.565519] process_one_work+0x20f/0x410 [354194.565521] worker_thread+0x34/0x400 [354194.565522] kthread+0x120/0x140 [354194.565523] ? process_one_work+0x410/0x410 [354194.565524] ? __kthread_parkme+0x70/0x70 [354194.565525] ret_from_fork+0x35/0x40 [354315.400956] INFO: task Xorg:920 blocked for more than 362 seconds. [354315.411626] Not tainted 5.2.0-050200rc1-generic #201905191930 [354315.422647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354315.435897] Xorg D 0 920 854 0x00404004 [354315.435899] Call Trace: [354315.435923] __schedule+0x2ba/0x650 [354315.435925] schedule+0x2d/0x90 [354315.435927] schedule_preempt_disabled+0xe/0x10 [354315.435928] __ww_mutex_lock.isra.11+0x3e0/0x750 [354315.435929] __ww_mutex_lock_slowpath+0x16/0x20 [354315.435930] ww_mutex_lock+0x34/0x50 [354315.435935] ttm_eu_reserve_buffers+0x1f9/0x2e0 [ttm] [354315.435939] qxl_release_reserve_list+0x67/0x150 [qxl] [354315.435941] ? qxl_bo_pin+0xaa/0x190 [qxl] [354315.435943] qxl_cursor_atomic_update+0x1b0/0x2e0 [qxl] [354315.435951] drm_atomic_helper_commit_planes+0xb9/0x220 [drm_kms_helper] [354315.435955] drm_atomic_helper_commit_tail+0x2b/0x70 [drm_kms_helper] [354315.435958] commit_tail+0x67/0x70 [drm_kms_helper] [354315.435962] drm_atomic_helper_commit+0x113/0x120 [drm_kms_helper] [354315.435974] drm_atomic_commit+0x4a/0x50 [drm] [354315.435977] drm_atomic_helper_update_plane+0xe9/0x100 [drm_kms_helper] [354315.435985] __setplane_atomic+0xd3/0x120 [drm] [354315.435993] drm_mode_cursor_universal+0x142/0x270 [drm] [354315.436001] drm_mode_cursor_common+0xcb/0x220 [drm] [354315.436009] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354315.436016] drm_mode_cursor2_ioctl+0xe/0x10 [drm] [354315.436021] drm_ioctl_kernel+0xb0/0x100 [drm] [354315.436023] ? ___sys_recvmsg+0x16c/0x200 [354315.436029] drm_ioctl+0x233/0x410 [drm] [354315.436036] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354315.436038] ? timerqueue_add+0x57/0x90 [354315.436040] ? enqueue_hrtimer+0x3c/0x90 [354315.436042] do_vfs_ioctl+0xa9/0x640 [354315.436043] ? fput+0x13/0x20 [354315.436045] ? __sys_recvmsg+0x88/0xa0 [354315.436046] ksys_ioctl+0x67/0x90 [354315.436047] __x64_sys_ioctl+0x1a/0x20 [354315.436049] do_syscall_64+0x5a/0x140 [354315.436050] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [354315.436051] RIP: 0033:0x7ffad14d3417 [354315.436069] Code: Bad RIP value. [354315.436070] RSP: 002b:00007ffdd5679978 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [354315.436071] RAX: ffffffffffffffda RBX: 000056428a474610 RCX: 00007ffad14d3417 [354315.436071] RDX: 00007ffdd56799b0 RSI: 00000000c02464bb RDI: 000000000000000e [354315.436072] RBP: 00007ffdd56799b0 R08: 0000000000000040 R09: 0000000000000010 [354315.436072] R10: 000000000000003f R11: 0000000000003246 R12: 00000000c02464bb [354315.436073] R13: 000000000000000e R14: 0000000000000000 R15: 000056428a4721d0 [354315.436103] INFO: task kworker/1:0:27625 blocked for more than 362 seconds. [354315.451103] Not tainted 5.2.0-050200rc1-generic #201905191930 [354315.461927] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354315.477908] kworker/1:0 D 0 27625 2 0x80004000 [354315.477916] Workqueue: events qxl_client_monitors_config_work_func [qxl] [354315.477918] Call Trace: [354315.477924] __schedule+0x2ba/0x650 [354315.477925] schedule+0x2d/0x90 [354315.477927] schedule_preempt_disabled+0xe/0x10 [354315.477928] __ww_mutex_lock.isra.11+0x3e0/0x750 [354315.477930] ? __switch_to_asm+0x34/0x70 [354315.477931] ? __switch_to_asm+0x40/0x70 [354315.477932] ? __switch_to_asm+0x40/0x70 [354315.477933] __ww_mutex_lock_slowpath+0x16/0x20 [354315.477933] ww_mutex_lock+0x34/0x50 [354315.477947] drm_modeset_lock+0x35/0xb0 [drm] [354315.477955] drm_modeset_lock_all_ctx+0x5d/0xe0 [drm] [354315.477963] drm_modeset_lock_all+0x5e/0xb0 [drm] [354315.477965] qxl_display_read_client_monitors_config+0x1e1/0x370 [qxl] [354315.477967] qxl_client_monitors_config_work_func+0x15/0x20 [qxl] [354315.477969] process_one_work+0x20f/0x410 [354315.477970] worker_thread+0x34/0x400 [354315.477972] kthread+0x120/0x140 [354315.477973] ? process_one_work+0x410/0x410 [354315.477973] ? __kthread_parkme+0x70/0x70 [354315.477975] ret_from_fork+0x35/0x40 [354436.251965] INFO: task Xorg:920 blocked for more than 483 seconds. [354436.253054] Not tainted 5.2.0-050200rc1-generic #201905191930 [354436.254109] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354436.255421] Xorg D 0 920 854 0x00404004 [354436.255423] Call Trace: [354436.255429] __schedule+0x2ba/0x650 [354436.255431] schedule+0x2d/0x90 [354436.255433] schedule_preempt_disabled+0xe/0x10 [354436.255434] __ww_mutex_lock.isra.11+0x3e0/0x750 [354436.255435] __ww_mutex_lock_slowpath+0x16/0x20 [354436.255435] ww_mutex_lock+0x34/0x50 [354436.255441] ttm_eu_reserve_buffers+0x1f9/0x2e0 [ttm] [354436.255445] qxl_release_reserve_list+0x67/0x150 [qxl] [354436.255446] ? qxl_bo_pin+0xaa/0x190 [qxl] [354436.255448] qxl_cursor_atomic_update+0x1b0/0x2e0 [qxl] [354436.255456] drm_atomic_helper_commit_planes+0xb9/0x220 [drm_kms_helper] [354436.255459] drm_atomic_helper_commit_tail+0x2b/0x70 [drm_kms_helper] [354436.255463] commit_tail+0x67/0x70 [drm_kms_helper] [354436.255467] drm_atomic_helper_commit+0x113/0x120 [drm_kms_helper] [354436.255479] drm_atomic_commit+0x4a/0x50 [drm] [354436.255482] drm_atomic_helper_update_plane+0xe9/0x100 [drm_kms_helper] [354436.255490] __setplane_atomic+0xd3/0x120 [drm] [354436.255498] drm_mode_cursor_universal+0x142/0x270 [drm] [354436.255506] drm_mode_cursor_common+0xcb/0x220 [drm] [354436.255513] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354436.255520] drm_mode_cursor2_ioctl+0xe/0x10 [drm] [354436.255526] drm_ioctl_kernel+0xb0/0x100 [drm] [354436.255527] ? ___sys_recvmsg+0x16c/0x200 [354436.255533] drm_ioctl+0x233/0x410 [drm] [354436.255540] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354436.255542] ? timerqueue_add+0x57/0x90 [354436.255544] ? enqueue_hrtimer+0x3c/0x90 [354436.255546] do_vfs_ioctl+0xa9/0x640 [354436.255547] ? fput+0x13/0x20 [354436.255548] ? __sys_recvmsg+0x88/0xa0 [354436.255550] ksys_ioctl+0x67/0x90 [354436.255551] __x64_sys_ioctl+0x1a/0x20 [354436.255553] do_syscall_64+0x5a/0x140 [354436.255554] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [354436.255555] RIP: 0033:0x7ffad14d3417 [354436.255559] Code: Bad RIP value. [354436.255560] RSP: 002b:00007ffdd5679978 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [354436.255561] RAX: ffffffffffffffda RBX: 000056428a474610 RCX: 00007ffad14d3417 [354436.255561] RDX: 00007ffdd56799b0 RSI: 00000000c02464bb RDI: 000000000000000e [354436.255562] RBP: 00007ffdd56799b0 R08: 0000000000000040 R09: 0000000000000010 [354436.255562] R10: 000000000000003f R11: 0000000000003246 R12: 00000000c02464bb [354436.255563] R13: 000000000000000e R14: 0000000000000000 R15: 000056428a4721d0 [354436.255599] INFO: task kworker/1:0:27625 blocked for more than 483 seconds. [354436.256802] Not tainted 5.2.0-050200rc1-generic #201905191930 [354436.257874] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354436.278727] kworker/1:0 D 0 27625 2 0x80004000 [354436.278735] Workqueue: events qxl_client_monitors_config_work_func [qxl] [354436.278736] Call Trace: [354436.278742] __schedule+0x2ba/0x650 [354436.278743] schedule+0x2d/0x90 [354436.278745] schedule_preempt_disabled+0xe/0x10 [354436.278746] __ww_mutex_lock.isra.11+0x3e0/0x750 [354436.278747] ? __switch_to_asm+0x34/0x70 [354436.278748] ? __switch_to_asm+0x40/0x70 [354436.278749] ? __switch_to_asm+0x40/0x70 [354436.278750] __ww_mutex_lock_slowpath+0x16/0x20 [354436.278751] ww_mutex_lock+0x34/0x50 [354436.278764] drm_modeset_lock+0x35/0xb0 [drm] [354436.278772] drm_modeset_lock_all_ctx+0x5d/0xe0 [drm] [354436.278779] drm_modeset_lock_all+0x5e/0xb0 [drm] [354436.278781] qxl_display_read_client_monitors_config+0x1e1/0x370 [qxl] [354436.278783] qxl_client_monitors_config_work_func+0x15/0x20 [qxl] [354436.278785] process_one_work+0x20f/0x410 [354436.278786] worker_thread+0x34/0x400 [354436.278787] kthread+0x120/0x140 [354436.278788] ? process_one_work+0x410/0x410 [354436.278789] ? __kthread_parkme+0x70/0x70 [354436.278790] ret_from_fork+0x35/0x40 [354557.088600] INFO: task Xorg:920 blocked for more than 604 seconds. [354557.089689] Not tainted 5.2.0-050200rc1-generic #201905191930 [354557.090759] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354557.092075] Xorg D 0 920 854 0x00404004 [354557.092077] Call Trace: [354557.092083] __schedule+0x2ba/0x650 [354557.092085] schedule+0x2d/0x90 [354557.092086] schedule_preempt_disabled+0xe/0x10 [354557.092087] __ww_mutex_lock.isra.11+0x3e0/0x750 [354557.092089] __ww_mutex_lock_slowpath+0x16/0x20 [354557.092089] ww_mutex_lock+0x34/0x50 [354557.092095] ttm_eu_reserve_buffers+0x1f9/0x2e0 [ttm] [354557.092098] qxl_release_reserve_list+0x67/0x150 [qxl] [354557.092100] ? qxl_bo_pin+0xaa/0x190 [qxl] [354557.092102] qxl_cursor_atomic_update+0x1b0/0x2e0 [qxl] [354557.092110] drm_atomic_helper_commit_planes+0xb9/0x220 [drm_kms_helper] [354557.092114] drm_atomic_helper_commit_tail+0x2b/0x70 [drm_kms_helper] [354557.092117] commit_tail+0x67/0x70 [drm_kms_helper] [354557.092121] drm_atomic_helper_commit+0x113/0x120 [drm_kms_helper] [354557.092133] drm_atomic_commit+0x4a/0x50 [drm] [354557.092137] drm_atomic_helper_update_plane+0xe9/0x100 [drm_kms_helper] [354557.092145] __setplane_atomic+0xd3/0x120 [drm] [354557.092154] drm_mode_cursor_universal+0x142/0x270 [drm] [354557.092162] drm_mode_cursor_common+0xcb/0x220 [drm] [354557.092170] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354557.092179] drm_mode_cursor2_ioctl+0xe/0x10 [drm] [354557.092185] drm_ioctl_kernel+0xb0/0x100 [drm] [354557.092187] ? ___sys_recvmsg+0x16c/0x200 [354557.092193] drm_ioctl+0x233/0x410 [drm] [354557.092201] ? drm_mode_cursor_ioctl+0x60/0x60 [drm] [354557.092203] ? timerqueue_add+0x57/0x90 [354557.092205] ? enqueue_hrtimer+0x3c/0x90 [354557.092207] do_vfs_ioctl+0xa9/0x640 [354557.092208] ? fput+0x13/0x20 [354557.092209] ? __sys_recvmsg+0x88/0xa0 [354557.092210] ksys_ioctl+0x67/0x90 [354557.092212] __x64_sys_ioctl+0x1a/0x20 [354557.092213] do_syscall_64+0x5a/0x140 [354557.092215] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [354557.092216] RIP: 0033:0x7ffad14d3417 [354557.092220] Code: Bad RIP value. [354557.092221] RSP: 002b:00007ffdd5679978 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [354557.092222] RAX: ffffffffffffffda RBX: 000056428a474610 RCX: 00007ffad14d3417 [354557.092223] RDX: 00007ffdd56799b0 RSI: 00000000c02464bb RDI: 000000000000000e [354557.092223] RBP: 00007ffdd56799b0 R08: 0000000000000040 R09: 0000000000000010 [354557.092223] R10: 000000000000003f R11: 0000000000003246 R12: 00000000c02464bb [354557.092224] R13: 000000000000000e R14: 0000000000000000 R15: 000056428a4721d0 [354557.092259] INFO: task kworker/1:0:27625 blocked for more than 604 seconds. [354557.093464] Not tainted 5.2.0-050200rc1-generic #201905191930 [354557.094520] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [354557.095834] kworker/1:0 D 0 27625 2 0x80004000 [354557.095838] Workqueue: events qxl_client_monitors_config_work_func [qxl] [354557.095839] Call Trace: [354557.095841] __schedule+0x2ba/0x650 [354557.095843] schedule+0x2d/0x90 [354557.095844] schedule_preempt_disabled+0xe/0x10 [354557.095845] __ww_mutex_lock.isra.11+0x3e0/0x750 [354557.095846] ? __switch_to_asm+0x34/0x70 [354557.095847] ? __switch_to_asm+0x40/0x70 [354557.095848] ? __switch_to_asm+0x40/0x70 [354557.095849] __ww_mutex_lock_slowpath+0x16/0x20 [354557.095850] ww_mutex_lock+0x34/0x50 [354557.095858] drm_modeset_lock+0x35/0xb0 [drm] [354557.095866] drm_modeset_lock_all_ctx+0x5d/0xe0 [drm] [354557.095874] drm_modeset_lock_all+0x5e/0xb0 [drm] [354557.095876] qxl_display_read_client_monitors_config+0x1e1/0x370 [qxl] [354557.095878] qxl_client_monitors_config_work_func+0x15/0x20 [qxl] [354557.095880] process_one_work+0x20f/0x410 [354557.095881] worker_thread+0x34/0x400 [354557.095882] kthread+0x120/0x140 [354557.095883] ? process_one_work+0x410/0x410 [354557.095884] ? __kthread_parkme+0x70/0x70 [354557.095885] ret_from_fork+0x35/0x40 Please contact me if more information is needed. Best regards, Jaak Ristioja
On Tue, Aug 06, 2019 at 09:00:10PM +0300, Jaak Ristioja wrote:> Hello! > > I'm writing to report a crash in the QXL / DRM code in the Linux kernel. > I originally filed the issue on LaunchPad and more details can be found > there, although I doubt whether these details are useful.Any change with kernel 5.3-rc7 ? cheers, Gerd
On 05.09.19 10:14, Gerd Hoffmann wrote:> On Tue, Aug 06, 2019 at 09:00:10PM +0300, Jaak Ristioja wrote: >> Hello! >> >> I'm writing to report a crash in the QXL / DRM code in the Linux kernel. >> I originally filed the issue on LaunchPad and more details can be found >> there, although I doubt whether these details are useful. > > Any change with kernel 5.3-rc7 ?Didn't try. Did you change something? I could try, but I've done so before and every time this bug manifests itself with MAJOR.MINOR-rc# I get asked to try version MAJOR.(MINOR+1)-rc# so I guess I could as well give up? Alright, I'll install 5.3-rc7, but once more it might take some time for this bug to expose itself. One thing to note though, is that this occurred much more often with older kernels (or older versions of the Kubuntu desktop/Firefox in my VM), sometimes even several times in an hour of use. Best regards, J