Bug 354395

Summary:	media-libs/alsa-lib: distorted/blippy/robot sound with =sys-libs/glibc-2.13 ?
Product:	Gentoo Linux	Reporter:	Sebastian Pipping <sping>
Component:	Current packages	Assignee:	Gentoo ALSA team <alsa-bugs>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info Packages reinstalled after glibc downgrade

Description Sebastian Pipping gentoo-dev

2011-02-10 18:29:01 UTC

I update a bunch of packages today resulting in wierd sound on a few websites, possibly involving flash.  This page played perfectly in www-client/firefox-3.6.13 yesterday:

http://soundcloud.com/zwr/sets/zoot-woman-things-are-what-they-used-to-be

Updates possibly involved:
- alsa-utils-1.0.24.1
- alsa-lib-1.0.24.2
- sys-libs/glibc-2.13

However, downgrading alsa to 1.0.23 (including alsa restart, even reboot) did not fix my problem.

I have that problem on two different amd64 machines:
A) 2.6.36-gentoo-r5
B) 2.6.37-gentoo

Any ideas?  If it's not alsa, what could it be?

Comment 1 Sebastian Pipping gentoo-dev

2011-02-10 18:29:42 UTC

Created attachment 262069 [details]
emerge --info

Comment 2 Rafał Mużyło 2011-02-10 19:26:27 UTC

Any chance it's that glibc memcpy thing ?

(just a minor note: I'm not on glibc 2.13 yet - honestly, it sounds like fun
(no, seriously it does) - but for whatever the reason that page doesn't play any sound for me, doesn't even seem to try)

Comment 3 Sebastian Pipping gentoo-dev

2011-02-11 09:14:27 UTC

(In reply to comment #2)
> Any chance it's that glibc memcpy thing ?

Not sure yet.  Thanks for the hint.

Comment 4 Sebastian Pipping gentoo-dev

2011-02-11 11:45:03 UTC

Created attachment 262121 [details]
Packages reinstalled after glibc downgrade

After downgrading glibc to 2.12.2 and re-emerging the excact packages listed in above attachment, sound on

http://soundcloud.com/zwr/sets/zoot-woman-things-are-what-they-used-to-be

works fine again in Firefox 3.6.13.

Comment 5 Diego Elio Pettenò (RETIRED) gentoo-dev

2011-02-11 12:26:37 UTC

If it's memcpy() it doesn't matter what you reinstalled afterwards.

More than likely your problem is the reverse memcpy(), good luck to find where that happens though, if you don't want to valgrind everything.

Comment 6 Sebastian Pipping gentoo-dev

2011-02-11 12:36:31 UTC

(In reply to comment #5)
> If it's memcpy() it doesn't matter what you reinstalled afterwards.

Agreed, but as I don't know for sure, I better added the list.

Comment 7 Sebastian Pipping gentoo-dev

2011-02-11 13:21:42 UTC


*** This bug has been marked as a duplicate of bug 354073 ***