Control: tag -1 moreinfo
On Thu, 2017-01-26 at 15:40 -0500, Daniel Kahn Gillmor wrote:
> Package: src:linux
> Version: 4.9.2-2
> Severity: normal
>
> Using the same USB webcam as from the crash reported in
> https://bugs.debian.org/852738, i plugged it in again after rebooting
> into 4.9.0-1-amd64 (version 4.9.2-2). While i didn't get the null
> pointer dereference, i got several unusual messages ("Warning!
> Unlikely big volume range (=3072), cval->res is probably wrong") on
> insertion, and then 5 minutes later i yanked the camera and got a
> series of warnings on removal that all seem to be related to sysfs
> groups:
[...]
It looks like the camera was still in use when it was removed, as the
warning shows that a task called 'AudioThread' is closing a file
handle. Do you know whether the behaviour is specific to this camera,
or does it also happen with other USB cameras?
(This looks somewhat similar to the problem discussed in
<https://lkml.org/lkml/2013/11/19/189>. The real fix for that appears
to have been <https://lkml.org/lkml/2013/11/23/179>. But that was in
PCI, not USB.)
Ben.
--
Ben Hutchings
Design a system any fool can use, and only a fool will want to use it.
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