(cc alsa-devel) On 07.10.2012 21:34, Helge Hafting wrote: > My sound setup works fine with 3.5.4, but have serious problems with 3.6.0 > > It is sound through jack that breaks, simply using "aplay" directly with the > alsa device works. > > When I use jack, my setup works fine with 3.5.4. But boot into 3.6.0, > and I get badly distorted sound as if using an extremely overdone reverb > effect. > And jack reports tons of xruns, several per second. > > This can be worked around by going from 256 to 512 frames/period in the jack > settings. But that also double the latency, which makes keyboard playing less > pleasant. > > It is not a case of 256 frames/period being (almost) too extreme for the > machine. With kernel 3.5.4, > I can use 128 frames/period and get mostly ok sound, with only an occational > xrun (and a correseponding pop in the sound). So I use 256 because that's > solid. > But with 3.6.0, not even 256 is enough. And it is not an occational pop, but > awful distortion all the time. > > I don't really know what has changed from 3.5.4 to 3.6.0. The hd-audio driver? > Something in alsa? Or the scheduling? > > Machine: Dell precision M6600 laptop, 8GB, 2.2GHz quad-core i7. > Usually at 800MHz to save power, this is enough for making sound. > Kernels: 64-bit 3.5.4 or 3.6.0 > Distro: funtoo > > Audio according to lspci: > 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family > High Definition Audio Controller (rev 04) > > Please tell if there is anything I should try. I can test other kernel > versions > or try patches. > > Helge Hafting > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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