Bug 47171 - no sound after last kernel update
no sound after last kernel update
Product: Drivers
Classification: Unclassified
Component: EDAC
All Linux
: P1 normal
Assigned To: drivers_edac@kernel-bugs.osdl.org
Depends on:
  Show dependency treegraph
Reported: 2012-09-07 09:38 UTC by i42n
Modified: 2013-11-19 23:17 UTC (History)
5 users (show)

See Also:
Kernel Version: 3.5.3
Tree: Mainline
Regression: No


Description i42n 2012-09-07 09:38:11 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:

Comment 1 Takashi Iwai 2012-09-07 10:36:13 UTC
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.
Comment 2 i42n 2012-09-07 13:02:39 UTC
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?
Comment 3 Takashi Iwai 2012-09-07 13:10:49 UTC
Assign the bug to the right component and reassign to the right person :)
Comment 4 Alan 2012-09-07 15:35:41 UTC
Concur.. the Edac crash will probably block any further probes.

Comment 5 Mauro Carvalho Chehab 2012-10-17 02:39:54 UTC


I'm posting the patches for review today at linux-edac ML, at vger.kernel.org.
Comment 6 Florian Mickler 2012-12-15 03:31:21 UTC
A patch referencing this bug report has been merged in Linux v3.7-rc8:

commit 479696840239e0cc43efb3c917bdcad2174d2215
Author: Mauro Carvalho Chehab <mchehab@redhat.com>
Date:   Mon Oct 15 21:48:48 2012 -0300

    i82975x_edac: Fix dimm label initialization

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