Kernel Bug Tracker – Bug 47171
no sound after last kernel update
Last modified: 2013-11-19 23:17:03 UTC
In short words: kernel update, no sound any more, strange boot messages.
Longer version: Since some days I get strange boot messages. Also sound does not work any more. Even without starting xserver there is no sound available. The command "alsamixer" is not available any more. Very strange. Someone with the exact same machine than mine has the same effects too.
I put the whole dmesg output until the system is booted here: http://pastebin.com/GFNNLGrw
For more information see those two forum threads:
The Oops comes from EDAC driver, so try to disable it first.
I guess the sound disappearance is just a side-effect by such errors, as I see no kernel messages regarding the sound. Maybe the driver probing stalls at that point.
Disabling edac driver fixed it. See https://bbs.archlinux.org/viewtopic.php?pid=1158033#p1158033
So I assume that it is actually a bug in the edac driver and I therefore have to wait for them to fix it. Is there a way to let those people know?
Assign the bug to the right component and reassign to the right person :)
Concur.. the Edac crash will probably block any further probes.
I'm posting the patches for review today at linux-edac ML, at vger.kernel.org.
A patch referencing this bug report has been merged in Linux v3.7-rc8:
Author: Mauro Carvalho Chehab <firstname.lastname@example.org>
Date: Mon Oct 15 21:48:48 2012 -0300
i82975x_edac: Fix dimm label initialization