Hello! On Thu, Sep 15, 2011 at 10:39:44AM +0200, Oliver Neukum wrote: > Am Dienstag, 13. September 2011, 13:12:40 schrieb Andreas Henriksson: > > On Mon, Sep 12, 2011 at 09:01:33AM +0200, Oliver Neukum wrote: > > Hi, > > > After some more testing, I'll have to say that my webcam still doesn't > > work well even after applying the reset quirks. > > > > The reset quirks fixed "chipmunks audio" problems and initially > > everything works fine. After a while of actually using the camera > > (with skype for example) things go south though.... > > So using means really operating the camera, not going through S3? Yes, really using the camera (both audio mic and video). The first few minutes works great, then problem arises. I also still got spammed by the kernel every second(!) with a message like this,both with or without the reset quirks patch: Sep 13 06:27:01 amd64 kernel: [134738.040246] 9:3:4: cannot set freq 48000 to ep 0x86 Sep 13 06:27:02 amd64 kernel: [134739.040120] 9:3:4: cannot set freq 48000 to ep 0x86 Sep 13 06:27:03 amd64 kernel: [134740.040117] 9:3:4: cannot set freq 48000 to ep 0x86 Sep 13 06:27:04 amd64 kernel: [134741.040118] 9:3:4: cannot set freq 48000 to ep 0x86 > > > I don't know exactly what the problem is but it seems pulseaudio > > becomes really unhappy with the device after a while, and when > > pulseaudio is unhappy so is the entire application stack (Skype crashes, > > Sound properties of Gnome 3 System Settings can't list any input or outputs, > > Totem won't start, ...). The current workaround I've found is to unplug > > the webcam and plug it back in again (ie. which I guess is basically equal to > > rmmod uvcvideo ; modprobe uvcvideo). This makes everything behave again, > > for a short time... > > > > Any suggestions on what I should look at or test when I get some more time > > is very welcome! > > The very first test is to rule out a problem with the patch. I don't believe > there is, but there might be. Please boot a kernel without the patch adding > usbcore.autosuspend=-1 on the kernel command line (you may need to > rebuild initrd if you load usbcore in it) and retest with skype. I've done some googling and here are a few hints I've found but not yet had time to verify: Initial regression between 2.6.38 -> 2.6.39 ... reported at: https://bugzilla.kernel.org/show_bug.cgi?id=35922 Forum thread with some more people having problems: https://bbs.archlinux.org/viewtopic.php?id=121607 I also read somewhere that there was someone who only saw problems when using both audio and video from the webcam device at the same time. Not when using it only for audio (mic). I've downgraded to 2.6.38 at the moment, though not found a chance to test it yet. The only change I've noticed so far is the "freq" spamming is gone! I'll report back after this weekend with the results of testing with 2.6.38 and also with the usb autosuspend disabled (thanks for the hint on how to do that!). (FYI, I've also looked briefly at the git log between 2.6.38 and .39 and my untrained eye couldn't spot anything else then the usb autosuspend changes that seemed relevant.) > > Regards > Oliver -- Andreas Henriksson -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
