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Date:      Sun, 20 Aug 2023 18:30:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 273151] Kernel panic caused by audio driver on cold boot - AMD Ryzen 9 7900
Message-ID:  <bug-273151-227-wdodfng3uD@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-273151-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-273151-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273151

--- Comment #6 from Alex M. <matei35@yahoo.com> ---
The kernel panic is caused by snd_hda.ko.

In the file /usr/src/sys/amd64/conf/GENERIC, section 'Sound support', I
commented out all the lines except one:
...
# Sound support
device          sound                   # Generic sound driver (required)
#device         snd_cmi                 # CMedia CMI8338/CMI8738
#device         snd_csa                 # Crystal Semiconductor CS461x/428x
#device         snd_emu10kx             # Creative SoundBlaster Live! and
Audigy
#device         snd_es137x              # Ensoniq AudioPCI ES137x
#device         snd_hda                 # Intel High Definition Audio
#device         snd_ich                 # Intel,NVidia and other ICH AC'97
Audio
#device         snd_via8233             # VIA VT8233x Audio
...

swift@eagle:~ cat /boot/device.hints
...
hint.hdac.1.cad0.nid20.config=3D"as=3D1"
hint.hdac.1.cad0.nid27.config=3D"as=3D1 seq=3D15"

With the new kernel, after logging in, I run the following command:

swift@eagles:~ sudo /sbin/kldload -n /boot/kernel/snd_hda.ko

which intermittently generates the kernel panic as you can see in
 kernelPanicScreenMessge.jpg.
Attached are also the crash files from /var/crash:
core.txt.6
vmcore.6
info.6
bounds

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