Public bug reported:

Hello,

I'm using Ubuntu together with Windows on my laptop.

If I boot in Ubuntu after Windows sound doesn't work well (instead of
system sounds I can hear only shot noise). To fix the issue I need to
completely shut down the system (call Power Off via Ubuntu GUI) and then
boot again in Ubuntu. Please note, that reboot (called via Ubuntu GUI)
doesn't help to fix the issue.

Expected result: sound works well regardless of boot history.
Actual result: every time I boot in Ubuntu after Windows sound doesn't work.

Issue occurrence: 100%.

Environment:
$ lsb_release -rd
Description:    Ubuntu Hirsute Hippo (development branch)
Release:        21.04
$ uname -a
Linux tiptop 5.11.0-16-generic #17-Ubuntu SMP Wed Apr 14 20:12:43 UTC 2021 
x86_64 x86_64 x86_64 GNU/Linux

Please find dmesg output attached.

Thank you in advance!

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Attachment added: "dmesg.tar.gz"
   
https://bugs.launchpad.net/bugs/1925047/+attachment/5489838/+files/dmesg.tar.gz

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https://bugs.launchpad.net/bugs/1925047

Title:
  Sound doesn't work after boot in Windows

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