This is the closest, most recent report I could find with something which also 
appears kernel related
Kernel 6.5.0-27  -- works fine
Kernel 6.5.0-28  -- graphics hard-hangs - sddm never displays, vtty can't be 
activated
   shh works, sddm and x11 processes can not be killed, reboot hangs, hard 
power cycle required


I see reports like this literally for years, yet seemingly no resolution.  Now 
I'm bit, in a way suspiciously kernel version related
Common internet "use nvidia drivers" wisdom is unworkable as old nvidia 
hardware is not supported on 22.04
04:00.0 VGA compatible controller: NVIDIA Corporation MCP89 [GeForce 320M] (rev 
a2)

Again, for me, this is with 22.04, kernel 6.5.0-28

All the various combinations of nouveau flags to kernel boot which have
helped reduce garbage or sddm troubles don't help.

Here's a relevant boot log:
Apr 20 21:06:29 Konnekt sddm-greeter[922]: Adding view for "LVDS-1" QRect(0,0 
1280x800)
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000216004 put 0000216088 ib_get 00000007 ib_put 
00000007 state 800081a4 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021608c put 0000217b7c ib_get 00000009 ib_put 
0000000a state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000218ff0 put 000021932c ib_get 0000000d ib_put 
00000012 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219a48 put 0000219a64 ib_get 0000001f ib_put 
00000024 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219a64 put 0000219a7c ib_get 00000021 ib_put 
00000024 state 80000024 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219a7c put 0000219a8c ib_get 00000023 ib_put 
00000024 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219a8c put 0000219ccc ib_get 00000025 ib_put 
0000002a state 80000024 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219de8 put 0000219df8 ib_get 0000002f ib_put 
00000030 state 40000004 (err: INVALID_MTHD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: CACHE_ERROR - ch 3 
[sddm-greeter[922]] subc 0 mthd 0000 data 20000000
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000219ef0 put 000021a2f0 ib_get 00000033 ib_put 
00000038 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0020b10960 put 0020b10ac8 ib_get 00000042 ib_put 
00000044 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021aff8 put 000021bdf4 ib_get 0000004b ib_put 
0000004c state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021c248 put 000021c620 ib_get 0000004d ib_put 
0000004e state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000417a40 put 0000417a4c ib_get 00000056 ib_put 
00000058 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000417b54 put 0000417b5c ib_get 0000005c ib_put 
0000005e state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004d3370 put 00004d33f4 ib_get 00000062 ib_put 
00000064 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004db3c0 put 00004db450 ib_get 00000068 ib_put 
0000006a state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021d000 put 000021d150 ib_get 0000006b ib_put 
0000006c state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000417c50 put 0000417c5c ib_get 0000006e ib_put 
00000070 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004d3630 put 00004d3684 ib_get 0000007a ib_put 
0000007c state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004d3a30 put 00004d3a84 ib_get 00000080 ib_put 
00000082 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0020b117d0 put 0020b118fc ib_get 0000008c ib_put 
0000008e state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004d3de0 put 00004d3e28 ib_get 00000092 ib_put 
00000094 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 0000417e50 put 0000417e5c ib_get 00000098 ib_put 
0000009a state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021ef00 put 000021efbc ib_get 000000ad ib_put 
000000ae state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 000021f000 put 000021f350 ib_get 000000b3 ib_put 
000000b4 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004ae990 put 00004ae9cc ib_get 000000b6 ib_put 
000000b8 state 80000000 (err: INVALID_CMD) push 00400040
Apr 20 21:06:29 Konnekt kernel: nouveau 0000:04:00.0: fifo: DMA_PUSHER - ch 3 
[sddm-greeter[922]] get 00004dbe90 put 00004dbf8c ib_get 000000bc ib_put 
000000be state 80000000 (err: INVALID_CMD) push 00400040
[...]
Apr 20 21:08:47 Konnekt kernel: INFO: task kworker/u4:3:53 blocked for more 
than 120 seconds.
Apr 20 21:08:47 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:08:47 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:08:47 Konnekt kernel: task:kworker/u4:3    state:D stack:0     pid:53 
   ppid:2      flags:0x00004000
Apr 20 21:08:47 Konnekt kernel: Workqueue: events_unbound 
nv50_disp_atomic_commit_work [nouveau]
Apr 20 21:08:47 Konnekt kernel: Call Trace:
Apr 20 21:08:47 Konnekt kernel:  <TASK>
Apr 20 21:08:47 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:08:47 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:08:47 Konnekt kernel:  schedule_timeout+0x157/0x170
Apr 20 21:08:47 Konnekt kernel:  dma_fence_default_wait+0x13d/0x210
Apr 20 21:08:47 Konnekt kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
Apr 20 21:08:47 Konnekt kernel:  dma_fence_wait_timeout+0x116/0x140
Apr 20 21:08:47 Konnekt kernel:  drm_atomic_helper_wait_for_fences+0x172/0x200 
[drm_kms_helper]
Apr 20 21:08:47 Konnekt kernel:  nv50_disp_atomic_commit_tail+0x86/0xaf0 
[nouveau]
Apr 20 21:08:47 Konnekt kernel:  nv50_disp_atomic_commit_work+0x12/0x20 
[nouveau]
Apr 20 21:08:47 Konnekt kernel:  process_one_work+0x240/0x450
Apr 20 21:08:47 Konnekt kernel:  worker_thread+0x50/0x3f0
Apr 20 21:08:47 Konnekt kernel:  ? __pfx_worker_thread+0x10/0x10
Apr 20 21:08:47 Konnekt kernel:  kthread+0xf2/0x120
Apr 20 21:08:47 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:08:47 Konnekt kernel:  ret_from_fork+0x47/0x70
Apr 20 21:08:47 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:08:47 Konnekt kernel:  ret_from_fork_asm+0x1b/0x30
Apr 20 21:08:47 Konnekt kernel:  </TASK>
[...]
Apr 20 21:10:48 Konnekt kernel: INFO: task kworker/u4:3:53 blocked for more 
than 241 seconds.
Apr 20 21:10:48 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:10:48 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:10:48 Konnekt kernel: task:kworker/u4:3    state:D stack:0     pid:53 
   ppid:2      flags:0x00004000
Apr 20 21:10:48 Konnekt kernel: Workqueue: events_unbound 
nv50_disp_atomic_commit_work [nouveau]
Apr 20 21:10:48 Konnekt kernel: Call Trace:
Apr 20 21:10:48 Konnekt kernel:  <TASK>
Apr 20 21:10:48 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:10:48 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:10:48 Konnekt kernel:  schedule_timeout+0x157/0x170
Apr 20 21:10:48 Konnekt kernel:  dma_fence_default_wait+0x13d/0x210
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
Apr 20 21:10:48 Konnekt kernel:  dma_fence_wait_timeout+0x116/0x140
Apr 20 21:10:48 Konnekt kernel:  drm_atomic_helper_wait_for_fences+0x172/0x200 
[drm_kms_helper]
Apr 20 21:10:48 Konnekt kernel:  nv50_disp_atomic_commit_tail+0x86/0xaf0 
[nouveau]
Apr 20 21:10:48 Konnekt kernel:  nv50_disp_atomic_commit_work+0x12/0x20 
[nouveau]
Apr 20 21:10:48 Konnekt kernel:  process_one_work+0x240/0x450
Apr 20 21:10:48 Konnekt kernel:  worker_thread+0x50/0x3f0
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_worker_thread+0x10/0x10
Apr 20 21:10:48 Konnekt kernel:  kthread+0xf2/0x120
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:10:48 Konnekt kernel:  ret_from_fork+0x47/0x70
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:10:48 Konnekt kernel:  ret_from_fork_asm+0x1b/0x30
Apr 20 21:10:48 Konnekt kernel:  </TASK>
Apr 20 21:10:48 Konnekt kernel: INFO: task Xorg:847 blocked for more than 120 
seconds.
Apr 20 21:10:48 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:10:48 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:10:48 Konnekt kernel: task:Xorg            state:D stack:0     
pid:847   ppid:781    flags:0x00400006
Apr 20 21:10:48 Konnekt kernel: Call Trace:
Apr 20 21:10:48 Konnekt kernel:  <TASK>
Apr 20 21:10:48 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:10:48 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:10:48 Konnekt kernel:  schedule_preempt_disabled+0x15/0x30
Apr 20 21:10:48 Konnekt kernel:  __ww_mutex_lock.constprop.0+0x5cd/0xa70
Apr 20 21:10:48 Konnekt kernel:  __ww_mutex_lock_slowpath+0x16/0x30
Apr 20 21:10:48 Konnekt kernel:  ww_mutex_lock+0x86/0xa0
Apr 20 21:10:48 Konnekt kernel:  drm_modeset_lock+0xb9/0xf0 [drm]
Apr 20 21:10:48 Konnekt kernel:  drm_crtc_get_sequence_ioctl+0x119/0x1f0 [drm]
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:10:48 Konnekt kernel:  drm_ioctl_kernel+0xde/0x190 [drm]
Apr 20 21:10:48 Konnekt kernel:  drm_ioctl+0x2d0/0x550 [drm]
Apr 20 21:10:48 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:10:48 Konnekt kernel:  nouveau_drm_ioctl+0x61/0xc0 [nouveau]
Apr 20 21:10:48 Konnekt kernel:  __x64_sys_ioctl+0xa3/0xf0
Apr 20 21:10:48 Konnekt kernel:  do_syscall_64+0x5b/0x90
Apr 20 21:10:48 Konnekt kernel:  ? sysvec_apic_timer_interrupt+0x4b/0xd0
Apr 20 21:10:48 Konnekt kernel:  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Apr 20 21:10:48 Konnekt kernel: RIP: 0033:0x7e6249f1a94f
Apr 20 21:10:48 Konnekt kernel: RSP: 002b:00007ffd9c760010 EFLAGS: 00000246 
ORIG_RAX: 0000000000000010
Apr 20 21:10:48 Konnekt kernel: RAX: ffffffffffffffda RBX: 00007ffd9c7600a0 
RCX: 00007e6249f1a94f
Apr 20 21:10:48 Konnekt kernel: RDX: 00007ffd9c7600a0 RSI: 00000000c018643b 
RDI: 0000000000000012
Apr 20 21:10:48 Konnekt kernel: RBP: 00000000c018643b R08: 000056595500f990 
R09: 0000000000000000
Apr 20 21:10:48 Konnekt kernel: R10: 00000000000fa000 R11: 0000000000000246 
R12: 00007ffd9c7601c8
Apr 20 21:10:48 Konnekt kernel: R13: 0000000000000012 R14: 000056595500ff70 
R15: 00007ffd9c760100
Apr 20 21:10:48 Konnekt kernel:  </TASK>
Apr 20 21:12:49 Konnekt kernel: INFO: task kworker/u4:3:53 blocked for more 
than 362 seconds.
Apr 20 21:12:49 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:12:49 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:12:49 Konnekt kernel: task:kworker/u4:3    state:D stack:0     pid:53 
   ppid:2      flags:0x00004000
Apr 20 21:12:49 Konnekt kernel: Workqueue: events_unbound 
nv50_disp_atomic_commit_work [nouveau]
Apr 20 21:12:49 Konnekt kernel: Call Trace:
Apr 20 21:12:49 Konnekt kernel:  <TASK>
Apr 20 21:12:49 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:12:49 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:12:49 Konnekt kernel:  schedule_timeout+0x157/0x170
Apr 20 21:12:49 Konnekt kernel:  dma_fence_default_wait+0x13d/0x210
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
Apr 20 21:12:49 Konnekt kernel:  dma_fence_wait_timeout+0x116/0x140
Apr 20 21:12:49 Konnekt kernel:  drm_atomic_helper_wait_for_fences+0x172/0x200 
[drm_kms_helper]
Apr 20 21:12:49 Konnekt kernel:  nv50_disp_atomic_commit_tail+0x86/0xaf0 
[nouveau]
Apr 20 21:12:49 Konnekt kernel:  nv50_disp_atomic_commit_work+0x12/0x20 
[nouveau]
Apr 20 21:12:49 Konnekt kernel:  process_one_work+0x240/0x450
Apr 20 21:12:49 Konnekt kernel:  worker_thread+0x50/0x3f0
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_worker_thread+0x10/0x10
Apr 20 21:12:49 Konnekt kernel:  kthread+0xf2/0x120
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:12:49 Konnekt kernel:  ret_from_fork+0x47/0x70
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:12:49 Konnekt kernel:  ret_from_fork_asm+0x1b/0x30
Apr 20 21:12:49 Konnekt kernel:  </TASK>
Apr 20 21:12:49 Konnekt kernel: INFO: task Xorg:847 blocked for more than 241 
seconds.
Apr 20 21:12:49 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:12:49 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:12:49 Konnekt kernel: task:Xorg            state:D stack:0     
pid:847   ppid:781    flags:0x00400006
Apr 20 21:12:49 Konnekt kernel: Call Trace:
Apr 20 21:12:49 Konnekt kernel:  <TASK>
Apr 20 21:12:49 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:12:49 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:12:49 Konnekt kernel:  schedule_preempt_disabled+0x15/0x30
Apr 20 21:12:49 Konnekt kernel:  __ww_mutex_lock.constprop.0+0x5cd/0xa70
Apr 20 21:12:49 Konnekt kernel:  __ww_mutex_lock_slowpath+0x16/0x30
Apr 20 21:12:49 Konnekt kernel:  ww_mutex_lock+0x86/0xa0
Apr 20 21:12:49 Konnekt kernel:  drm_modeset_lock+0xb9/0xf0 [drm]
Apr 20 21:12:49 Konnekt kernel:  drm_crtc_get_sequence_ioctl+0x119/0x1f0 [drm]
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:12:49 Konnekt kernel:  drm_ioctl_kernel+0xde/0x190 [drm]
Apr 20 21:12:49 Konnekt kernel:  drm_ioctl+0x2d0/0x550 [drm]
Apr 20 21:12:49 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:12:49 Konnekt kernel:  nouveau_drm_ioctl+0x61/0xc0 [nouveau]
Apr 20 21:12:49 Konnekt kernel:  __x64_sys_ioctl+0xa3/0xf0
Apr 20 21:12:49 Konnekt kernel:  do_syscall_64+0x5b/0x90
Apr 20 21:12:49 Konnekt kernel:  ? sysvec_apic_timer_interrupt+0x4b/0xd0
Apr 20 21:12:49 Konnekt kernel:  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Apr 20 21:12:49 Konnekt kernel: RIP: 0033:0x7e6249f1a94f
Apr 20 21:12:49 Konnekt kernel: RSP: 002b:00007ffd9c760010 EFLAGS: 00000246 
ORIG_RAX: 0000000000000010
Apr 20 21:12:49 Konnekt kernel: RAX: ffffffffffffffda RBX: 00007ffd9c7600a0 
RCX: 00007e6249f1a94f
Apr 20 21:12:49 Konnekt kernel: RDX: 00007ffd9c7600a0 RSI: 00000000c018643b 
RDI: 0000000000000012
Apr 20 21:12:49 Konnekt kernel: RBP: 00000000c018643b R08: 000056595500f990 
R09: 0000000000000000
Apr 20 21:12:49 Konnekt kernel: R10: 00000000000fa000 R11: 0000000000000246 
R12: 00007ffd9c7601c8
Apr 20 21:12:49 Konnekt kernel: R13: 0000000000000012 R14: 000056595500ff70 
R15: 00007ffd9c760100
Apr 20 21:12:49 Konnekt kernel:  </TASK>
Apr 20 21:14:50 Konnekt kernel: INFO: task kworker/u4:3:53 blocked for more 
than 483 seconds.
Apr 20 21:14:50 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:14:50 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:14:50 Konnekt kernel: task:kworker/u4:3    state:D stack:0     pid:53 
   ppid:2      flags:0x00004000
Apr 20 21:14:50 Konnekt kernel: Workqueue: events_unbound 
nv50_disp_atomic_commit_work [nouveau]
Apr 20 21:14:50 Konnekt kernel: Call Trace:
Apr 20 21:14:50 Konnekt kernel:  <TASK>
Apr 20 21:14:50 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:14:50 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:14:50 Konnekt kernel:  schedule_timeout+0x157/0x170
Apr 20 21:14:50 Konnekt kernel:  dma_fence_default_wait+0x13d/0x210
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
Apr 20 21:14:50 Konnekt kernel:  dma_fence_wait_timeout+0x116/0x140
Apr 20 21:14:50 Konnekt kernel:  drm_atomic_helper_wait_for_fences+0x172/0x200 
[drm_kms_helper]
Apr 20 21:14:50 Konnekt kernel:  nv50_disp_atomic_commit_tail+0x86/0xaf0 
[nouveau]
Apr 20 21:14:50 Konnekt kernel:  nv50_disp_atomic_commit_work+0x12/0x20 
[nouveau]
Apr 20 21:14:50 Konnekt kernel:  process_one_work+0x240/0x450
Apr 20 21:14:50 Konnekt kernel:  worker_thread+0x50/0x3f0
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_worker_thread+0x10/0x10
Apr 20 21:14:50 Konnekt kernel:  kthread+0xf2/0x120
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:14:50 Konnekt kernel:  ret_from_fork+0x47/0x70
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_kthread+0x10/0x10
Apr 20 21:14:50 Konnekt kernel:  ret_from_fork_asm+0x1b/0x30
Apr 20 21:14:50 Konnekt kernel:  </TASK>
Apr 20 21:14:50 Konnekt kernel: INFO: task Xorg:847 blocked for more than 362 
seconds.
Apr 20 21:14:50 Konnekt kernel:       Tainted: P           OE      
6.5.0-28-generic #29~22.04.1-Ubuntu
Apr 20 21:14:50 Konnekt kernel: "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 21:14:50 Konnekt kernel: task:Xorg            state:D stack:0     
pid:847   ppid:781    flags:0x00400006
Apr 20 21:14:50 Konnekt kernel: Call Trace:
Apr 20 21:14:50 Konnekt kernel:  <TASK>
Apr 20 21:14:50 Konnekt kernel:  __schedule+0x2cb/0x750
Apr 20 21:14:50 Konnekt kernel:  schedule+0x63/0x110
Apr 20 21:14:50 Konnekt kernel:  schedule_preempt_disabled+0x15/0x30
Apr 20 21:14:50 Konnekt kernel:  __ww_mutex_lock.constprop.0+0x5cd/0xa70
Apr 20 21:14:50 Konnekt kernel:  __ww_mutex_lock_slowpath+0x16/0x30
Apr 20 21:14:50 Konnekt kernel:  ww_mutex_lock+0x86/0xa0
Apr 20 21:14:50 Konnekt kernel:  drm_modeset_lock+0xb9/0xf0 [drm]
Apr 20 21:14:50 Konnekt kernel:  drm_crtc_get_sequence_ioctl+0x119/0x1f0 [drm]
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:14:50 Konnekt kernel:  drm_ioctl_kernel+0xde/0x190 [drm]
Apr 20 21:14:50 Konnekt kernel:  drm_ioctl+0x2d0/0x550 [drm]
Apr 20 21:14:50 Konnekt kernel:  ? __pfx_drm_crtc_get_sequence_ioctl+0x10/0x10 
[drm]
Apr 20 21:14:50 Konnekt kernel:  nouveau_drm_ioctl+0x61/0xc0 [nouveau]
Apr 20 21:14:50 Konnekt kernel:  __x64_sys_ioctl+0xa3/0xf0
Apr 20 21:14:50 Konnekt kernel:  do_syscall_64+0x5b/0x90
Apr 20 21:14:50 Konnekt kernel:  ? sysvec_apic_timer_interrupt+0x4b/0xd0
Apr 20 21:14:50 Konnekt kernel:  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Apr 20 21:14:50 Konnekt kernel: RIP: 0033:0x7e6249f1a94f
Apr 20 21:14:50 Konnekt kernel: RSP: 002b:00007ffd9c760010 EFLAGS: 00000246 
ORIG_RAX: 0000000000000010
Apr 20 21:14:50 Konnekt kernel: RAX: ffffffffffffffda RBX: 00007ffd9c7600a0 
RCX: 00007e6249f1a94f
Apr 20 21:14:50 Konnekt kernel: RDX: 00007ffd9c7600a0 RSI: 00000000c018643b 
RDI: 0000000000000012
Apr 20 21:14:50 Konnekt kernel: RBP: 00000000c018643b R08: 000056595500f990 
R09: 0000000000000000
Apr 20 21:14:50 Konnekt kernel: R10: 00000000000fa000 R11: 0000000000000246 
R12: 00007ffd9c7601c8
Apr 20 21:14:50 Konnekt kernel: R13: 0000000000000012 R14: 000056595500ff70 
R15: 00007ffd9c760100
Apr 20 21:14:50 Konnekt kernel:  </TASK>

-- 
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/1788044

Title:
  task kworker blocked for more than 120 seconds nouveau

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788044/+subscriptions


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