Mark, On Tue, May 12, 2015 at 11:12:58AM +0100, Mark Brown wrote: > > According to an off-list discussion, the sound breakage (and not just some > > jack detection issue) seems to be caused due to alsa-lib being too old. > > Right, it needs the userspace configuration files installing. ... and PulseAudio 6.0, as you stated in another message, but which is not in Debian jessie. Therefore, commit b1ef29725865 does cause a regression (even though it's just a side effect): the Dell XPS 13 (2013) works just fine with a standard Debian jessie install and a current kernel. Sound worked fine until commit b1ef29725865 / works fine with commit b1ef29725865 reverted. New kernels should continue to work on (reasonably) old userspace; and currently I do not see how this can be made to work with commit b1ef29725865 and no quirk / override. As soon as I find the time for that, I'll try to create a patch for that -- unless someone beats me to that. > > Under the no-regression rule, this means that either b1ef29725865 needs > > to be reverted or we need to find another solution to this matter, such as > > an override. And I think it is needed for longer than just for 4.1, as it > > will continue to be cause regressions on quite recent userspace. > > Does this also affect other behaviour of the system? I'd be pretty > unhappy if it introduce power regressions for example, I mostly don't use > audio on my laptops but I care a lot about how long it'll run > disconnected. It *is* quite a new laptop and my experience installing > was very much that it was in bringup (though quite a bit of this was > userspace). Well, sound _is_ quite important to me; and as stated above, the laptop works just fine otherwise on Debian jessie (well, except the WiFi adapter, but that's another story). Best, Dominik
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