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gspca driver related issues on kernel 3.1 and 3.2-rc7


I have a webcam:
 ( 0ac8:305b ) Z-Star Microelectronics Corp. ZC0305 Webcam that uses the
gspca driver (gspca_zc3xx). I have Debian Wheezy installed.

It works well with older kernels - i used it up to 2.6.38 or 39 and had
no issues with it. But with the 3 series kernels (at least the current
3.1 and the 3.2 from unstable) started to misbehave.
If i use it with any program (Skype, Vlc, Jitsi etc) it works, but after
finishing the streaming/call or after a period of time after that i
cannot close those programs anymore, they freeze and kill or kill -9
does not kill them.
Additionally the camera does not unregister (the /dev/video0 device is
there) if plugged out and all usb hotplugging ceases to work (the
already plugged devices work and lsusb shows a "snapshot" of the
plugged-in devices).
Rmmodding the gspca drivers does not work (device is busy), using the -f
switch locks the console.
dmesg shows no output, no kernel panic or anything. Only when i used
Jitsi (which is java-based) i have seen some reports about "the thread
being blocked for more than 120 seconds".

Only resolution i found is a restart.

Is this a known issue?
O zi buna,
Kertesz Laszlo

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