https://bugzilla.novell.com/show_bug.cgi?id=285914
User hans@schwimmbeck.de added comment
https://bugzilla.novell.com/show_bug.cgi?id=285914#c16
Hans Schwimmbeck changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Version|Alpha 5 |Final
Platform|x86-64 |x86
Component|Sound |Sound
CC| |hans@schwimmbeck.de
Resolution|NORESPONSE |
Product|openSUSE 10.3 |openSUSE 11.1
OS/Version|openSUSE 10.2 |openSUSE 11.1
--- Comment #16 from Hans Schwimmbeck 2009-03-30 16:49:43 MDT ---
I have to reopen this bug, because I have similar issues with my USB sound
card. I refer to Bug 409042 which I reported 9 months ago and was resolved by a
kernel update.
Hardware is still the same Eizo monitor HD2441W with builtin USB Audio DAC
idVendor=08bb, idProduct=2704 Burr-Brown from TI,
CPU is a AMD BE-2400 on a Foxconn A7DA-S mainbord Northbridge AMD 790GX
Southbridge AMD SB750.
OS is openSUSE 11.1 with stock kernel 2.6.27.19-3.2-pae.
I had very rare sound problems on 11.1 with this usb sound card which I now can
reproduce. When listening to a music disc and starting a kernel compilation the
sound stops with the following error message:
--------
kernel: ALSA sound/usb/usbaudio.c:1347: 4:1:1: usb_set_interface failed.
--------
Sound resumes only after a reboot.
After installing cpufreq I tried out different governors instead of the default
ondemand governor. With both performance and powersave governor sound is fine.
In my understanding they force the CPU frequency to the highest/lowest possible
value.
Setting a fixed CPU frequency by
--------
cpufreq-set -g userspace
cpufreq-set -f 2.0GHz
--------
also resolves the issue.
So obviously frequency switching as occurring when a CPU demanding task like
compilation starts causes the problem. I am running the CPU now at fixed
2.0GHz, which seems to be an acceptable compromise between power comsumption an
performance, but a working ondemand governor would be a desirable solution.
I have to add that the same issue appears with Debian Lenny, my "playing
ground", where I tried out different kernels up to 2.6.29 with the same
results.
Nevertheless I post the bug here, because SUSE/openSUSE is my productive system
since 7.something.
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