Thursday 14 of February 2008 13:14:18 Takashi Iwai napisał(a):
And, does a similar problem like Grzegorz's case occur on your laptop? Some HP laptops (so far, AMD SB450-based) occasionally cause a hang-up during recording from the mic when HD is accessed. This is far more nasty problem, and it's interesting to know whether this happens on other chipset.
Hi Takashi. I've experimented a little with power saving in HD Intel Audio. I've noticed that using power saving with timeout set to 10 sec. solves my problem partially. When arecord stops recording I can turn it off, wait 10 seconds, and recording works back again. This is obvious, because power saving simply powers off and on device. I was wondering that maybe we can implement ioctl or something that will dump "state" (informations that will help in debuging) of device, when recording is not working, and "state" just after power on to compare what causes breakage ? Can you give me some tips about what informations are userful in debuging ?
Well, the question is what "state". Interesting thing is that it's specific to ATI SB, and seems irrelevant with codec chip. So, the codec information is likely useless. But, I don't think the broken situation is reflected on PCI reg space.
BTW, Andi Kleen also has a similar problem on his machine and he used noirqdebug boot option. But, in his case, the irq line of HD audio device isn't shared with others.
Hi Andi. Do you have similiar problem, and did you resolve it ?
Links to threads are below:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2449 http://mailman.alsa-project.org/pipermail/alsa-devel/2008-February/005817.ht... http://mailman.alsa-project.org/pipermail/alsa-devel/2008-February/006042.ht...