Mir ist gerade noch das Systemlog aufgefallen beim anstecken der USB Webcam. Ich hab die entsprechende Stelle mal Fett gedruckt. Der nachfolgende Block wird ins Systemlog geschrieben sobald die USB Cam angeschlossen wird...
... kernel: [170297.830069] usb 1-2: new high speed USB device using ehci_hcd and address 4
... kernel: [170298.151122] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0805)
... kernel: [170298.189692] input: UVC Camera (046d:0805) as /devices/pci0000:00/0000:00:13.5/usb1/1-2/1-2:1.0/input/input9
... kernel: [170299.144711] usbcore: registered new interface driver snd-usb-audio
... rtkit-daemon[1592]: Successfully made thread 18046 of process 3662 (n/a) owned by '1000' RT at priority 5.
... rtkit-daemon[1592]: Supervising 5 threads of 1 processes of 1 users.
... kernel: [170300.341620] ehci_hcd 0000:00:13.5: force halt; handshake ffffc9000067e424 00004000 00000000 -> -110
... kernel: [170300.341635] cannot submit datapipe for urb 1, error -108: device disabled
[B]... kernel: [170303.022594] rtl8187: wireless radio switch turned off
... NetworkManager[1009]: <info> WiFi now disabled by radio killswitch[/B]
... kernel: [170303.152674] wlan0: deauthenticating from 00:1f:3f:d6:58:ea by local choice (reason=3)
... NetworkManager[1009]: <info> (wlan0): device state change: 8 -> 2 (reason 0)
... NetworkManager[1009]: <info> (wlan0): deactivating device (reason: 0).
... avahi-daemon[1010]: Interface wlan0.IPv6 no longer relevant for mDNS.
... avahi-daemon[1010]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::216:44ff:feca:44a0.
... avahi-daemon[1010]: Interface wlan0.IPv4 no longer relevant for mDNS.
... avahi-daemon[1010]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.2.102.
... avahi-daemon[1010]: Withdrawing address record for fe80::216:44ff:feca:44a0 on wlan0.
... avahi-daemon[1010]: Withdrawing address record for 192.168.2.102 on wlan0.
... avahi-daemon[1010]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.2.102.
... avahi-daemon[1010]: New relevant interface wlan0.IPv4 for mDNS.
... avahi-daemon[1010]: Registering new address record for 192.168.2.102 on wlan0.IPv4.
... kernel: [170303.372588] cfg80211: All devices are disconnected, going to restore regulatory settings
... kernel: [170303.372605] cfg80211: Restoring regulatory settings
... kernel: [170303.372614] cfg80211: Calling CRDA to update world regulatory domain
... kernel: [170303.385781] cfg80211: World regulatory domain updated:
... kernel: [170303.385791] (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
... kernel: [170303.385800] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
... kernel: [170303.385809] (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
... kernel: [170303.385817] (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
... kernel: [170303.385824] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
... kernel: [170303.385831] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
... wpa_supplicant[1412]: CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
... NetworkManager[1009]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 13296
... avahi-daemon[1010]: Withdrawing address record for 192.168.2.102 on wlan0.
... avahi-daemon[1010]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.2.102.
... avahi-daemon[1010]: Interface wlan0.IPv4 no longer relevant for mDNS.
... kernel: [170303.494208] pidgin[3845]: segfault at 14 ip 00007fa42ec92371 sp 00007ffff96075d0 error 4 in libdbusmenu-glib.so.1.0.17[7fa42ec8a000+10000]
... kernel: [170306.362544] timeout: still 1 active urbs..
Nachtrag
Mittles dieser Angaben habe ich nun folgendes gefunden:
http://ca.ubuntuforums.org/showthread.php?t=1523329
Scheint wohl ein grundsätzliches Hardwareproblem zu sein was zumindest bei Ubuntu auftritt. (siehe letzten Post von xavivars am 01.08.2010)