** Changed in: linux-signed-hwe-6.5 (Ubuntu)
Assignee: (unassigned) => Anthony Wong (anthonywong)
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https://bugs.launchpad.net/bugs/2061091
Title:
Freezing user space processes failed after 20.008 seconds (1 tasks
refusing to freeze, wq_busy=0)
Status in linux-signed-hwe-6.5 package in Ubuntu:
New
Bug description:
Sometimes, when trying to shut down or suspend my laptop, it gets
stuck on the console screen. If I was suspending, it eventually gives
up and goes back to the X session. During a shutdown it hangs forever
and the only solution seems to be to force a reboot with Magic-SysRq.
The following appears in `kern.log`:
```
Apr 12 08:59:54 xps9320 kernel: [173172.510341] Freezing user space processes
failed after 20.008 seconds (1 tasks refusing to freeze, wq_busy=0):
Apr 12 08:59:54 xps9320 kernel: [173172.515669] task:wireplumber state:D
stack:0 pid:2408 ppid:2398 flags:0x00000006
Apr 12 08:59:54 xps9320 kernel: [173172.518923] Call Trace:
Apr 12 08:59:54 xps9320 kernel: [173172.521755] <TASK>
Apr 12 08:59:54 xps9320 kernel: [173172.524099] __schedule+0x2cb/0x750
Apr 12 08:59:54 xps9320 kernel: [173172.526333] schedule+0x63/0x110
Apr 12 08:59:54 xps9320 kernel: [173172.528585]
snd_power_ref_and_wait+0xe5/0x140 [snd]
Apr 12 08:59:54 xps9320 kernel: [173172.530825] ?
__pfx_autoremove_wake_function+0x10/0x10
Apr 12 08:59:54 xps9320 kernel: [173172.533103] snd_ctl_elem_info+0x4f/0x1b0
[snd]
Apr 12 08:59:54 xps9320 kernel: [173172.535354]
snd_ctl_elem_info_user+0x59/0xc0 [snd]
Apr 12 08:59:54 xps9320 kernel: [173172.537598] snd_ctl_ioctl+0x1d4/0x650
[snd]
Apr 12 08:59:54 xps9320 kernel: [173172.539846] ? __fget_light+0xa5/0x120
Apr 12 08:59:54 xps9320 kernel: [173172.542082] __x64_sys_ioctl+0xa0/0xf0
Apr 12 08:59:54 xps9320 kernel: [173172.544334] do_syscall_64+0x58/0x90
Apr 12 08:59:54 xps9320 kernel: [173172.546566] ?
syscall_exit_to_user_mode+0x37/0x60
Apr 12 08:59:54 xps9320 kernel: [173172.548838] ? do_syscall_64+0x67/0x90
Apr 12 08:59:54 xps9320 kernel: [173172.551085] ? do_syscall_64+0x67/0x90
Apr 12 08:59:54 xps9320 kernel: [173172.553342] ?
syscall_exit_to_user_mode+0x37/0x60
Apr 12 08:59:54 xps9320 kernel: [173172.555596] ? do_syscall_64+0x67/0x90
Apr 12 08:59:54 xps9320 kernel: [173172.557828] ? common_interrupt+0x54/0xb0
Apr 12 08:59:54 xps9320 kernel: [173172.560075]
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Apr 12 08:59:54 xps9320 kernel: [173172.562321] RIP: 0033:0x70f3adb1a94f
Apr 12 08:59:54 xps9320 kernel: [173172.564650] RSP: 002b:00007ffef2072940
EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Apr 12 08:59:54 xps9320 kernel: [173172.566925] RAX: ffffffffffffffda RBX:
00007ffef20729b0 RCX: 000070f3adb1a94f
Apr 12 08:59:54 xps9320 kernel: [173172.569222] RDX: 00007ffef20729b0 RSI:
00000000c1105511 RDI: 0000000000000022
Apr 12 08:59:54 xps9320 kernel: [173172.571501] RBP: 00007ffef2072b90 R08:
000065107d2b6070 R09: 0000000000000004
Apr 12 08:59:54 xps9320 kernel: [173172.573762] R10: fffffffffffff014 R11:
0000000000000246 R12: 000065107d2ee100
Apr 12 08:59:54 xps9320 kernel: [173172.576047] R13: 000065107d1fb400 R14:
00007ffef2072b30 R15: 00007ffef2072ad0
Apr 12 08:59:54 xps9320 kernel: [173172.578308] </TASK>
```
Another point of interest is that, when in this situation:
* `lsusb` hangs after printing out a few lines
* Outgoing SSH connections hang unless I clear SSH_AUTH_SOCK. gpg-agent
appears to be trying to check for smartcards.
So I guess there is some sort of deadlock in the USB subsystem which
is causing all the other problems?
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.5.0-27-generic 6.5.0-27.28~22.04.1
ProcVersionSignature: Ubuntu 6.5.0-27.28~22.04.1-generic 6.5.13
Uname: Linux 6.5.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 12 09:42:52 2024
InstallationDate: Installed on 2022-06-28 (653 days ago)
InstallationMedia: Xubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64
(20220419)
SourcePackage: linux-signed-hwe-6.5
UpgradeStatus: No upgrade log present (probably fresh install)
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