Re: AC97 sound problems with current

Orion Hodson wrote:
> Kevin Oberman writes:
> |
> | After upgrading my laptop from STABLE to CURRENT on 3/14 I have been
> | having problems with GnomeMeeting. Often the sound is badly broken with
> | 'spurts' of sound with silent gaps in between. This was never the case
> | with STABLE. Other times it's fine.
> |
> | When I looked at my dmesg output I noticed some changes between STABLE
> | and CURRENT for the pcm0 device. Under STABLE I only got two messages:
> | pcm0: <Intel 82801CA (ICH3)> port 0x18c0-0x18ff,0x1c00-0x1cff irq 11 at 
> device 31.5 on pci0
> | pcm0: <Analog Devices AD1881A ac97 codec>
> | Under CURRENT I get a third:
> |
> | pcm0: measured ac97 link rate at 512000000 Hz
> 
> There is a calibration step in the driver to determine the clock rate of the 
> AC97 link.  What you are seeing is the calibration step failing and setting a 
> bogus ac97 link rate.  I took a cursory look a couple of weeks back and it 
> smelt like the timecounter initialization point changed, but haven't gotten 
> around to looking closer and fixing the driver.

If this were true then I'd be very concerned.  Let me know what you
find.  For what it's worth, my ICH3 setup is still working fine when
loaded at boot, though my kernel is about 2 weeks old.

Scott