Messages in this thread | | | Date | Tue, 01 Nov 2005 00:12:30 +0100 | From | Ondrej Zary <> | Subject | Re: [BUG 2579] linux 2.6.* sound problems |
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Patrizio Bassi wrote:
> Ray Lee ha scritto: > >> On Mon, 2005-10-31 at 18:04 +0100, Patrizio Bassi wrote: >> >> >>>> On 10/31/05, Patrizio Bassi <patrizio.bassi@gmail.com> wrote: >>>> >>>> >>>>> starting from 2.6.0 (2 years ago) i have the following bug. >>>>> link: http://bugzilla.kernel.org/show_bug.cgi?id=2579 >> >> >> >>>>> fast summary: >>>>> when playing audio and using a bit the harddisk (i.e. md5sum of a 200mb >>>>> file) i hear noises, related to disk activity. more hd is used, more chicks >>>>> and ZZZZ noises happen. >>>> >>>> >>>> Does hdparm -i (or -I) show differences between the 2.4 kernels and >>>> 2.6? 2.6 has new IDE drivers, and so perhaps your system isn't using >>>> the best driver any more. >>>> >>>> You may also want to compare lspci -vv of your IDE controller and >>>> sound card between 2.4 and 2.6, and see if there are any differences. >>>> >>>> No guarantees, but this is where you'd start. >>>> >>>> >>>> >>>> >>>>> Ready to test any patch/solution. >>>> >>>> >>>> >>>> Try that. If nothing obvious appears in the examination, you may want >>>> to try the 2.6.14-rt1 patchset from Ingo Molnar. It's designed to >>>> reduce latency in the kernel, but also has a latency tracer that may >>>> be particularly useful for your problem. (Assuming it's a latency >>>> issue, and not a hardware misconfiguration due to 2.6 doing something >>>> wrong.)
I've seen something like this yesterday on ECS P6EXP-Me board (i440EX chipset) with onboard CMI8338 PCI sound chip. The sound was distorted when e.g. moving mouse in Windows. When I disabled "PCI 2.1 support" in BIOS, the problem disappeared in Windows. But when I booted Slax LiveCD, the same problem appeared - so I think that Linux enables something that's causing these problems with some PCI sound devices on these chipsets.
-- Ondrej Zary
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