Red Hat Bugzilla – Bug 125594
VIA Soundcard detected, but distorted sound
Last modified: 2007-11-30 17:10:44 EST
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User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Description of problem:
I installed FC-2 x86_64 on my Laptop ( AMD Mobile Athlon64 (2800+
MHz, 1 MByte L2-Cache), VIA K8T800, VIA
Technologies|VT8233/A/8235/8237 AC97 Audio Controller).
After Reboot, all looks good. The module snd_mixer_oss,
di,snd_seq_device are loaded.
When i run "soundcard detection", i see my soundcard and the Modul:
snd-via82xx. But if i play the "test sound", i hear the sound absolut
distorted. It played a small part of the sound and then loop the end.
Then play the next part and loop again, and so on.
The top command shows me, that at the moment i start the "test
sound", the cpu load grows rapid. Before, the cpu is idle at 99%.
During the test sound, i have nearly 20% user Load and 70%wa, nearly
0% idle. So i think, there is no more CPU to play the test sound, no
data are transmitted to the soundcard and so the sound loops.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.start of fedora runlevel 5
2.run "soundcard detection"
Actual Results: i hear crazy sound and the cpu is under heavy load.
*** Bug 125602 has been marked as a duplicate of this bug. ***
After i add the kernelparameter acpi=off, the sound works fine. In
the /var/log/messages i found an entry
ACPI-0179: *** Warning: The ACPI AML in your computer contains
errors, please nag the manufacturer to correct it.
ACPI-0182: *** Warning: Allowing relaxed access to fields; turn on
CONFIG_ACPI_DEBUG for details.
Can be this the problem?
please attach the complete dmesg and /proc/interrupts from the two cases --
with and without acpi=off.
the problem is the same as in bug #125592. Please see there for