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Groups > linux.debian.kernel > #92312 > unrolled thread

Bug#1135780: nouveau: driver caused graphical session to become unresponsive

Started bySalvatore Bonaccorso <carnil@debian.org>
First post2026-05-05 22:30 +0200
Last post2026-07-07 21:50 +0200
Articles 3 — 2 participants

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  Bug#1135780: nouveau: driver caused graphical session to become unresponsive Salvatore Bonaccorso <carnil@debian.org> - 2026-05-05 22:30 +0200
    Processed: Re: Bug#1135780: nouveau: driver caused graphical  session to become unresponsive "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-05 22:30 +0200
    Bug#1135780: nouveau: driver caused graphical session to become unresponsive Salvatore Bonaccorso <carnil@debian.org> - 2026-07-07 21:50 +0200

#92312 — Bug#1135780: nouveau: driver caused graphical session to become unresponsive

FromSalvatore Bonaccorso <carnil@debian.org>
Date2026-05-05 22:30 +0200
SubjectBug#1135780: nouveau: driver caused graphical session to become unresponsive
Message-ID<MRuyZ-2R16-7@gated-at.bofh.it>
Control: tags -1 + moreinfo

Hi

On Wed, May 06, 2026 at 06:19:23AM +1000, Anand Kumria wrote:
> Package: src:linux
> Version: 6.19.14-1
> Severity: normal
> 
> Dear Maintainer,
> 
> While in an ordinary graphical session, it suddenly became unresponsive.
> 
> After rebooting, the following messages were in the kernel log.
> 
> 
> -- Package-specific info:
> ** Kernel log: boot messages should be attached
> May 05 08:00:50 pushan kernel: INFO: task kworker/u32:3:305137 blocked for
> more than 120 seconds.
> May 05 08:00:50 pushan kernel:       Not tainted 6.19.14+deb14-amd64 #1
> Debian 6.19.14-1
> May 05 08:00:50 pushan kernel: "echo 0 >
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> May 05 08:00:50 pushan kernel: task:kworker/u32:3   state:D stack:0
> pid:305137 tgid:305137 ppid:2      task_flags:0x4208060 flags:0x00080000
> May 05 08:00:50 pushan kernel: Workqueue: events_unbound
> nv50_disp_atomic_commit_work [nouveau]
> May 05 08:00:50 pushan kernel: Call Trace:
> May 05 08:00:50 pushan kernel:  <TASK>
> May 05 08:00:50 pushan kernel:  __schedule+0x48a/0xfc0
> May 05 08:00:50 pushan kernel:  schedule+0x27/0xd0
> May 05 08:00:50 pushan kernel:  schedule_timeout+0xbd/0x100
> May 05 08:00:50 pushan kernel:  dma_fence_default_wait+0x1a8/0x280
> May 05 08:00:50 pushan kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
> May 05 08:00:50 pushan kernel:  dma_fence_wait_timeout+0xa2/0x150
> May 05 08:00:50 pushan kernel:
>  drm_atomic_helper_wait_for_fences+0x133/0x1f0 [drm_kms_helper]
> May 05 08:00:50 pushan kernel:  nv50_disp_atomic_commit_tail+0x88/0x790
> [nouveau]
> May 05 08:00:50 pushan kernel:  process_one_work+0x192/0x350
> May 05 08:00:50 pushan kernel:  worker_thread+0x196/0x300
> May 05 08:00:50 pushan kernel:  ? __pfx_worker_thread+0x10/0x10
> May 05 08:00:50 pushan kernel:  kthread+0xfc/0x240
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ret_from_fork+0x24d/0x290
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ret_from_fork_asm+0x1a/0x30
> May 05 08:00:50 pushan kernel:  </TASK>
> May 05 08:00:50 pushan kernel: INFO: task kworker/u33:0:306101 blocked for
> more than 120 seconds.
> May 05 08:00:50 pushan kernel:       Not tainted 6.19.14+deb14-amd64 #1
> Debian 6.19.14-1
> May 05 08:00:50 pushan kernel: "echo 0 >
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> May 05 08:00:50 pushan kernel: task:kworker/u33:0   state:D stack:0
> pid:306101 tgid:306101 ppid:2      task_flags:0x4208060 flags:0x00080000
> May 05 08:00:50 pushan kernel: Workqueue: ttm ttm_bo_delayed_delete [ttm]
> May 05 08:00:50 pushan kernel: Call Trace:
> May 05 08:00:50 pushan kernel:  <TASK>
> May 05 08:00:50 pushan kernel:  __schedule+0x48a/0xfc0
> May 05 08:00:50 pushan kernel:  schedule+0x27/0xd0
> May 05 08:00:50 pushan kernel:  schedule_timeout+0xbd/0x100
> May 05 08:00:50 pushan kernel:  dma_fence_default_wait+0x1a8/0x280
> May 05 08:00:50 pushan kernel:  ? __pfx_dma_fence_default_wait_cb+0x10/0x10
> May 05 08:00:50 pushan kernel:  dma_fence_wait_timeout+0xa2/0x150
> May 05 08:00:50 pushan kernel:  dma_resv_wait_timeout+0xce/0x1d0
> May 05 08:00:50 pushan kernel:  ttm_bo_delayed_delete+0x32/0x90 [ttm]
> May 05 08:00:50 pushan kernel:  process_one_work+0x192/0x350
> May 05 08:00:50 pushan kernel:  worker_thread+0x196/0x300
> May 05 08:00:50 pushan kernel:  ? __pfx_worker_thread+0x10/0x10
> May 05 08:00:50 pushan kernel:  kthread+0xfc/0x240
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ret_from_fork+0x24d/0x290
> May 05 08:00:50 pushan kernel:  ? __pfx_kthread+0x10/0x10
> May 05 08:00:50 pushan kernel:  ret_from_fork_asm+0x1a/0x30
> May 05 08:00:50 pushan kernel:  </TASK>

As 6.19.y is end of life now, can you please update to the 7.0.3-1
kernel in unstable and report back if you can reproduce the issue?

Regards,
Salvatore

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#92313 — Processed: Re: Bug#1135780: nouveau: driver caused graphical session to become unresponsive

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2026-05-05 22:30 +0200
SubjectProcessed: Re: Bug#1135780: nouveau: driver caused graphical session to become unresponsive
Message-ID<MRuyZ-2R16-11@gated-at.bofh.it>
In reply to#92312
Processing control commands:

> tags -1 + moreinfo
Bug #1135780 [src:linux] nouveau: driver caused graphical session to become unresponsive
Added tag(s) moreinfo.

-- 
1135780: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1135780
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#93266

FromSalvatore Bonaccorso <carnil@debian.org>
Date2026-07-07 21:50 +0200
Message-ID<NejXP-3mrW-3@gated-at.bofh.it>
In reply to#92312
Hi Anand,

On Tue, Jun 30, 2026 at 01:40:14PM +1000, Anand Kumria wrote:
> Hi,
> 
> The same lock-up has occurred with a new kernel version:
> 
> Jun 07 14:31:39 pushan kernel: Linux version 7.0.9+deb14-amd64 (
> debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-15 (Debian 15.2.0-17)>
> ...
> Jun 29 14:19:47 pushan kernel: BUG: kernel NULL pointer dereference,
> address: 0000000000000040
> Jun 29 14:19:48 pushan kernel: #PF: supervisor read access in kernel mode
> Jun 29 14:19:48 pushan kernel: #PF: error_code(0x0000) - not-present page
> Jun 29 14:19:48 pushan kernel: PGD 0 P4D 0
> Jun 29 14:19:48 pushan kernel: Oops: Oops: 0000 [#1] SMP PTI
> Jun 29 14:19:48 pushan kernel: CPU: 6 UID: 1000 PID: 1532627 Comm: chrome
> Not tainted 7.0.9+deb14-amd64 #1 PREEMPT(lazy)  Debian 7.0.9-1
> Jun 29 14:19:48 pushan kernel: Hardware name: Acer Veriton S680G
>  /Veriton M680G, BIOS P01-A4         05/27/2010
> Jun 29 14:19:48 pushan kernel: RIP: 0010:nouveau_fence_sync+0x12c/0x1b0
> [nouveau]
> Jun 29 14:19:48 pushan kernel: Code: 74 08 48 3d 20 dd d2 c0 75 aa e8 bf 47
> b1 c6 49 8b 76 50 48 85 f6 74 97 48 8b 85 f0 00 00 00 48 8b 96 f0 00 00 00
> 48 8b 40 40 <48> 39 42 40 0f 85 7b ff ff ff 48 39 f5 74 17 49 8b 47 30 48 8>
> Jun 29 14:19:48 pushan kernel: RSP: 0018:ffffcf83a06cf540 EFLAGS: 00010286
> Jun 29 14:19:48 pushan kernel: RAX: ffff8a62909f4000 RBX: ffffcf83a06cf558
> RCX: ffff8a635f0050c0
> Jun 29 14:19:48 pushan kernel: RDX: 0000000000000000 RSI: ffff8a62d6520c00
> RDI: ffffcf83a06cf558
> Jun 29 14:19:48 pushan kernel: RBP: ffff8a6304899400 R08: 0000000000000000
> R09: 0000820000000000
> Jun 29 14:19:48 pushan kernel: R10: ffff8a62909f41c0 R11: 00007e0000000000
> R12: 0000000000000000
> Jun 29 14:19:48 pushan kernel: R13: 0000000000000000 R14: ffff8a65acbc5d20
> R15: ffff8a6280f94500
> Jun 29 14:19:48 pushan kernel: FS:  00007f92404ce700(0000)
> GS:ffff8a6625efc000(0000) knlGS:0000000000000000
> Jun 29 14:19:48 pushan kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> Jun 29 14:19:48 pushan kernel: CR2: 0000000000000040 CR3: 0000000385f52000
> CR4: 00000000000026f0
> Jun 29 14:19:48 pushan kernel: Call Trace:
> Jun 29 14:19:48 pushan kernel:  <TASK>
> Jun 29 14:19:48 pushan kernel:  nouveau_bo_move+0x1de/0x8d0 [nouveau]
> Jun 29 14:19:48 pushan kernel:  ? ttm_pool_alloc+0x7d/0xb0 [ttm]
> Jun 29 14:19:48 pushan kernel:  ? ttm_tt_populate+0xa1/0x140 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_handle_move_mem+0xd0/0x1a0 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_evict+0x115/0x170 [ttm]
> Jun 29 14:19:48 pushan kernel:  ? __ttm_bo_lru_cursor_next+0xff/0x300 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_evict_cb+0x77/0xd0 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_lru_walk_for_evict+0xad/0x1d0 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_alloc_resource+0x186/0x4c0 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_validate+0x9e/0x180 [ttm]
> Jun 29 14:19:48 pushan kernel:  ttm_bo_init_reserved+0x16d/0x1f0 [ttm]
> Jun 29 14:19:48 pushan kernel:  nouveau_bo_init+0x95/0x110 [nouveau]
> Jun 29 14:19:48 pushan kernel:  ? __pfx_nouveau_bo_del_ttm+0x10/0x10
> [nouveau]
> Jun 29 14:19:48 pushan kernel:  nouveau_gem_new+0x163/0x200 [nouveau]
> Jun 29 14:19:48 pushan kernel:  nouveau_gem_ioctl_new+0x8c/0x170 [nouveau]
> Jun 29 14:19:48 pushan kernel:  ? __pfx_nouveau_gem_ioctl_new+0x10/0x10
> [nouveau]
> Jun 29 14:19:48 pushan kernel:  drm_ioctl_kernel+0xae/0x100 [drm]
> Jun 29 14:19:48 pushan kernel:  drm_ioctl+0x2a8/0x550 [drm]
> Jun 29 14:19:48 pushan kernel:  ? __pfx_nouveau_gem_ioctl_new+0x10/0x10
> [nouveau]
> Jun 29 14:19:48 pushan kernel:  nouveau_drm_ioctl+0x58/0xc0 [nouveau]
> Jun 29 14:19:48 pushan kernel:  __x64_sys_ioctl+0x97/0xe0
> Jun 29 14:19:48 pushan kernel:  do_syscall_64+0xcd/0x15f0
> Jun 29 14:19:48 pushan kernel:  ? __alloc_frozen_pages_noprof+0x17e/0x340
> Jun 29 14:19:48 pushan kernel:  ? mod_memcg_lruvec_state+0xe7/0x2e0
> Jun 29 14:19:48 pushan kernel:  ? lruvec_stat_mod_folio+0x85/0xd0
> Jun 29 14:19:48 pushan kernel:  ? __folio_mod_stat+0x2d/0x90
> Jun 29 14:19:48 pushan kernel:  ? set_ptes.isra.0+0x36/0x80
> Jun 29 14:19:48 pushan kernel:  ? do_anonymous_page+0x103/0x900
> Jun 29 14:19:48 pushan kernel:  ? __pte_offset_map+0x1b/0x100
> Jun 29 14:19:48 pushan kernel:  ? __handle_mm_fault+0xb12/0xf50
> Jun 29 14:19:48 pushan kernel:  ? __free_frozen_pages+0x242/0x7c0
> Jun 29 14:19:48 pushan kernel:  ? count_memcg_events+0xeb/0x220
> Jun 29 14:19:48 pushan kernel:  ? handle_mm_fault+0x1d6/0x2d0
> Jun 29 14:19:48 pushan kernel:  ? do_user_addr_fault+0x2b4/0x7b0
> Jun 29 14:19:48 pushan kernel:  ? irqentry_exit+0x6e/0x570
> Jun 29 14:19:48 pushan kernel:  ? exc_page_fault+0x82/0x1d0
> Jun 29 14:19:48 pushan kernel:  ? __irq_exit_rcu+0x3d/0xe0
> Jun 29 14:19:48 pushan kernel:  entry_SYSCALL_64_after_hwframe+0x76/0x7e
> Jun 29 14:19:48 pushan kernel: RIP: 0033:0x7f92416d7d3b
> Jun 29 14:19:48 pushan kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60
> c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00
> 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 0>
> Jun 29 14:19:48 pushan kernel: RSP: 002b:00007ffc0acf89f0 EFLAGS: 00000246
> ORIG_RAX: 0000000000000010
> Jun 29 14:19:48 pushan kernel: RAX: ffffffffffffffda RBX: 0000379c00221320
> RCX: 00007f92416d7d3b
> Jun 29 14:19:48 pushan kernel: RDX: 00007ffc0acf8aa0 RSI: 00000000c0306480
> RDI: 0000000000000013
> Jun 29 14:19:48 pushan kernel: RBP: 00007ffc0acf8aa0 R08: 00005600f4303bc8
> R09: 0000379c03e07dc0
> Jun 29 14:19:48 pushan kernel: R10: 0000379c03e07e8c R11: 0000000000000246
> R12: 00000000c0306480
> Jun 29 14:19:48 pushan kernel: R13: 0000000000000013 R14: 0000379c00088600
> R15: 0000000000001000
> Jun 29 14:19:48 pushan kernel:  </TASK>
> Jun 29 14:19:48 pushan kernel: Modules linked in: nft_fib_ipv6 nft_ct
> nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_fib_ipv4 nft_fib nf_tables
> wireguard libcurve25519 libchacha20poly1305 libchacha libpoly1305
> ip6_udp_tunnel u>
> Jun 29 14:19:48 pushan kernel:  drm_exec i2c_algo_bit drm_display_helper
> cec rc_core drm_client_lib drm_kms_helper sd_mod hid_generic usbhid uas
> usb_storage hid ahci libahci ata_generic iTCO_wdt drm libata intel_pmc_bxt
> ehci_p>
> Jun 29 14:19:48 pushan kernel: CR2: 0000000000000040
> Jun 29 14:19:48 pushan kernel: ---[ end trace 0000000000000000 ]---
> Jun 29 14:19:48 pushan kernel: RIP: 0010:nouveau_fence_sync+0x12c/0x1b0
> [nouveau]
> Jun 29 14:19:48 pushan kernel: Code: 74 08 48 3d 20 dd d2 c0 75 aa e8 bf 47
> b1 c6 49 8b 76 50 48 85 f6 74 97 48 8b 85 f0 00 00 00 48 8b 96 f0 00 00 00
> 48 8b 40 40 <48> 39 42 40 0f 85 7b ff ff ff 48 39 f5 74 17 49 8b 47 30 48 8>
> Jun 29 14:19:48 pushan kernel: RSP: 0018:ffffcf83a06cf540 EFLAGS: 00010286
> Jun 29 14:19:48 pushan kernel: RAX: ffff8a62909f4000 RBX: ffffcf83a06cf558
> RCX: ffff8a635f0050c0
> Jun 29 14:19:48 pushan kernel: RDX: 0000000000000000 RSI: ffff8a62d6520c00
> RDI: ffffcf83a06cf558
> Jun 29 14:19:48 pushan kernel: RBP: ffff8a6304899400 R08: 0000000000000000
> R09: 0000820000000000
> Jun 29 14:19:48 pushan kernel: R10: ffff8a62909f41c0 R11: 00007e0000000000
> R12: 0000000000000000
> Jun 29 14:19:48 pushan kernel: R13: 0000000000000000 R14: ffff8a65acbc5d20
> R15: ffff8a6280f94500
> Jun 29 14:19:48 pushan kernel: FS:  00007f92404ce700(0000)
> GS:ffff8a6625efc000(0000) knlGS:0000000000000000
> Jun 29 14:19:48 pushan kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033
> Jun 29 14:19:48 pushan kernel: CR2: 0000000000000040 CR3: 0000000385f52000
> CR4: 00000000000026f0
> Jun 29 14:19:52 pushan kernel: audit: type=1400
> audit(1782706792.259:350272): apparmor="DENIED" operation="ptrace"
> class="ptrace" profile="/usr/bin/papers//sanitized_helper" pid=368943
> comm="FSBroker855023" requested_mask="rea>
> Jun 29 14:20:05 pushan kernel: BUG: unable to handle page fault for
> address: ffffcf83a06cf7a8
> Jun 29 14:20:05 pushan kernel: #PF: supervisor read access in kernel mode
> Jun 29 14:20:05 pushan kernel: #PF: error_code(0x0000) - not-present page
> Jun 29 14:20:05 pushan kernel: PGD 100000067 P4D 100000067 PUD 100259067
> PMD 3d15b1067 PTE 0

It is not entirely clear we hit the same issue here, but we
defintively need more information in form of a full trace.

So I ask you once more again to please boot with the newest kernel in
meanwhile available, which is  7.1.3-1. In case you hit the issue
still, then we need a full trace. 

If it does not get reorded into log in time, then we might need to
attach a netconsole, cf. 
https://docs.kernel.org/networking/netconsole.html#netconsole

Regards,
Salvatore

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