On Fri, 05 Oct 2018 00:31:47 +0200, Nicolas Herochao wrote: > > Hey, Thanks for the quick response > > Am 04.10.18 um 22:55 CEST schrieb Takashi Iwai: > > > On Thu, 04 Oct 2018 16:42:05 +0200, > > Nicolas Huaman wrote: > >> A quirk in snd-usb-audio was added to automate setting sample rate to > >> 4800k and remove the previously exposed nonfunctional microphone for > >> the Bowers & Wilkins PX: > >> commit 240a8af929c7c57dcde28682725b29cf8474e8e5 > >> https://lore.kernel.org/patchwork/patch/919689/ > >> > >> However the headphones where updated shortly after that to remove the > >> unintentional microphone functionality. I guess because of this the > >> headphones now crash when connecting them via USB while the quirk is > >> active. Dmesg: > >> > >> snd-usb-audio: probe of 2-3:1.0 failed with error -22 > >> usb 2-3: 2:1: cannot get min/max values for control 2 (id 2) > >> > >> This patch removes the microfone and allows the headphones to connect > >> and work out of the box. It is based on the current mainline kernel > >> and successfully applied an tested on my machine (4.18.10.arch1-1). > >> > >> Signed-off-by: Nicolas Huaman <nicolas@xxxxxxxxxxx> > > Thanks, that looks much better now, and I can apply it. > > > > But just to be sure: is any quirk required after the firmware update > > on this device at all? What happens if you remove the whole quirk? > > Yes, the sample-rate problem is still present. I initially tried > disabling the quirk, but then I needed to set the default sample rate > of pulse to 48k again for the headphones to play sound, which is why I > wanted to find out how to fix it completely. > > This problem doesn't appear on windows (I think windows defaults to > 48k?). Perhaps that's the reason why it wasn't patched in a firmware > update up until now. > > > If this modified quirk is still mandatory, I'll happily apply the > > patch. > > > > > > thanks, > > > > Takashi > > The headphones I got already had the fixed firmware version, but even > older headphones can be updated using Android, IOS or Windows. > > My Fix corrects detection for headphones with all Firmware after > February 2018, so I think this quirk probably presents the best > solution for now, especially since the nonfunctional microphone of > older Firmware appeared on all platforms. Fair enough, I merged the patch now. Thanks! Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
