Seems I was mistaken. This happens on 6.8 as well.
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.5/+bug/2061091/+attachment/5773507/+files/kern.log
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Ok, I reproduced this on a rebuild of 6.5.0-34 with
CONFIG_PROVE_LOCKING. Here are some relevant-looking bits of the logs.
It looks like the wireplumber process and the usb_disconnect process
have deadlocked?
[Thinking about this further, possibly the action that triggers it is to
disconnect the
Oddly, I don't seem to be able to reproduce this problem on an upstream
6.8 kernel. I'll try with a rebuild of 6.5.0-27-generic instead.
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> And this call trace looks is related to current issue, I guess
snd_power_ref_and_wait was waiting for snd_card_disconnect which wakes
up power_sleep at the end of the code, but snd_card_disconnect ->
snd_device_disconnect_all -> snd_pcm_dev_disconnect was blocked for some
reason.
Yes,
Here's the kern.log since the last-but-one reboot.
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.5/+bug/2061091/+attachment/5766127/+files/kern.log.gz
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rav@xps9320:~$ cat /proc/asound/modules
0 snd_soc_sof_sdw
1 snd_usb_audio
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https://bugs.launchpad.net/bugs/2061091
Title:
Freezing user space processes
I found a very similar report at
https://discussion.fedoraproject.org/t/freezing-user-space-processes-
failed-after-20-000-seconds-2-tasks-refusing-to-freeze-wq-busy-0/92672,
but no resolution there.
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Public bug reported:
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.
5.4 was a long time ago, so I guess there's no point keeping this open
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
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Public bug reported:
An intermittent problem, but to reproduce:
* unplug a USB device
* plug it back in
* notice it hasn't been detected
After this point, no amount of plugging or unplugging seems to change
anything: nothing appears in `dmesg`, `lsusb` shows only internal USB
hardware, and
Public bug reported:
My system locked up, and stopped responding to mouse movement, keyboard,
network traffic, etc.
A few minutes later, it appeared to recover, although my X session
restarted and I had to log back in.
I found this in my kern.log:
Mar 16 09:08:33 fred kernel: [83775.521219]
I was previously seeing this problem; I've now upgraded to 3.1.0-46 and
am seeing a similar, but slightly different, panic (see attached)
** Attachment added: dmesg.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1404558/+attachment/4329425/+files/dmesg.txt
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