At Tue, 19 Feb 2008 15:12:50 +0100, Grzegorz Chwesewicz wrote: > > 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. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
