From Bugzilla Helper: 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, snd_via82xx,snd_pcm,snd_timer,snd_ac97_codec,snd_mpu401_uart,snd_rawmi 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): kernel-2.6.5-1.358 How reproducible: Always Steps to Reproduce: 1.start of fedora runlevel 5 2.run "soundcard detection" 3.play testsound Actual Results: i hear crazy sound and the cpu is under heavy load. Additional info:
*** 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 further information. best regards Holger Koch