What I've found is that the USB audio device I am using doesn't properly create a mixer which in turn causing these sysfs remove errors (due to another patch that emits these WARNs).
If I try to quirk it (for example using a test patch like this): https://lkml.org/lkml/2013/7/17/590 However the following commits allow the mixer creation to be skipped without a quirk: 4d7b86c98 "ALSA: snd-usb: mixer: propagate errors up the call chain" 83ea5d18d "ALSA: snd-usb: mixer: ignore -EINVAL in snd_usb_mixer_controls()" 61ac51301 "ALSA: usb: Parse UAC2 extension unit like for UAC1" Which renders that above patch unnecessary. So what's needed is a way to properly remove those sysfs entries without causing a warn even if we have a USB Audio device with a bogus UAC2 extensions. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1345008 Title: WARNING: CPU: 0 PID: 71 at /build/buildd/linux-3.13.0/fs/sysfs/group.c:214 sysfs_remove_group+0xc6/0xd0() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1345008/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
