Bug 47171

Summary:	no sound after last kernel update
Product:	Drivers	Reporter:	i42n (sax.man)
Component:	EDAC	Assignee:	drivers_edac (drivers_edac)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	alan, florian, mchehab, nathankohagen, tiwai
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.5.3	Subsystem:
Regression:	No	Bisected commit-id:

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:

https://bbs.archlinux.org/viewtopic.php?pid=1158022#p1158022
https://bbs.archlinux.org/viewtopic.php?id=148413

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.

Reassigning

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

i42n/Alan,

See:
   https://bugzilla.redhat.com/show_bug.cgi?id=848149#c31

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