if i use camstream, a webcam programm, 'dmesg' shows the following warnings: the program works, but dmesg locks this messages: dvb_frontend_stop: thread PID 1515870810 already died pwc Failed to restore power to the camera! (-32) pwc Failed to set LED on/off time. pwc type = 740 pwc type = 740 pwc decode_size = 5. pwc Using alternate setting 9. usb_unlink_urb() is deprecated for synchronous unlinks. Use usb_kill_urb() instead. Badness in usb_unlink_urb at drivers/usb/core/urb.c:457 [<c02768ab>] usb_unlink_urb+0x45/0x7e [<e0b1d0b2>] pwc_isoc_cleanup+0x59/0xd5 [pwc] [<e0b1d592>] pwc_video_close+0xa3/0x10c [pwc] [<c015f6c3>] __fput+0x4e/0xe7 [<c015e2a0>] filp_close+0x59/0x5f [<c0103337>] syscall_call+0x7/0xb usb_unlink_urb() is deprecated for synchronous unlinks. Use usb_kill_urb() instead. Badness in usb_unlink_urb at drivers/usb/core/urb.c:457 [<c02768ab>] usb_unlink_urb+0x45/0x7e [<e0b1d0b2>] pwc_isoc_cleanup+0x59/0xd5 [pwc] [<e0b1d592>] pwc_video_close+0xa3/0x10c [pwc] [<c015f6c3>] __fput+0x4e/0xe7 [<c015e2a0>] filp_close+0x59/0x5f [<c0103337>] syscall_call+0x7/0xb -- Regards Martin