Recently I tried a Logitech Quickcam E2500 on my computer and it worked (after I switched of the "auto exposure", but that's a different story/bug). So this bug is quite sensitive concerning the web cam.

Next I tried the Logitech Webcam C500 again. I had a look at the syslog when I plugged it in. After the kernel reports the registration of two new usb devices (uvcvideo and snd-usb-audio), the NetworkManager reports the deactivation of the wifi device and tries to reestablish an internet connection (without success). Finally, the syslog becomes flooded with messages from the kernel. There are only two different messages:

phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x3040 with error -108.

phy6 -> rt2x00usb_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffff8800

The Vendor Request has sometimes the value 0x06 and the offset changes between several values, I saw 0x30c0, 0x30c4,
0x3040, 0x308c and 0x3090. The first message comes about five times in a row and then comes the second. This seems to repeat endlessly, even after unplugging the web cam!

Is there any other information I can retrieve to solve this bug?

With best regards

mrhonne

PS: here is a part of the syslog after plugging in the web cam:

Oct  8 23:09:48 computer kernel: [ 5508.090140] usb 1-1: new high speed USB device using ehci_hcd and address 9
Oct  8 23:09:48 computer kernel: [ 5508.406108] usb 1-1: configuration #1 chosen from 1 choice
Oct  8 23:09:48 computer kernel: [ 5508.483421] Linux video capture interface: v2.00
Oct  8 23:09:49 computer kernel: [ 5508.526858] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0807)
Oct  8 23:09:49 computer kernel: [ 5508.564755] input: UVC Camera (046d:0807) as /devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1:1.0/input/input9
Oct  8 23:09:49 computer kernel: [ 5508.564900] usbcore: registered new interface driver uvcvideo
Oct  8 23:09:49 computer kernel: [ 5508.565048] USB Video Class driver (v0.1.0)
Oct  8 23:09:49 computer kernel: [ 5508.786589] usbcore: registered new interface driver snd-usb-audiot  8 23:10:16 computer kernel: [ 5536.040769] phy6 -> rt2x00usb_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffffffff
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 8 -> 3 (reason 11)
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): deactivating device (reason: 11).
Oct  8 23:10:17 computer NetworkManager: <WARN>  check_one_route(): (wlan1) error -34 returned from rtnl_route_del(): Sucess#012
Oct  8 23:10:17 computer avahi-daemon[930]: Withdrawing address record for 192.168.178.29 on wlan1.
Oct  8 23:10:17 computer avahi-daemon[930]: Leaving mDNS multicast group on interface wlan1.IPv4 with address 192.168.178.29.
Oct  8 23:10:17 computer avahi-daemon[930]: Interface wlan1.IPv4 no longer relevant for mDNS.
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) starting connection 'Wifi'
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 3 -> 4 (reason 0)
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) scheduled...
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): supplicant connection state:  scanning -> disconnected
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) started...
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) scheduled...
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) complete.
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) starting...
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 4 -> 5 (reason 0)
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1/wireless): access point 'Wifi' has security, but secrets are required.
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 5 -> 6 (reason 0)
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) complete.
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) scheduled...
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) started...
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 6 -> 4 (reason 0)
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) scheduled...
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 1 of 5 (Device Prepare) complete.
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) starting...
Oct  8 23:10:17 computer NetworkManager: <info>  (wlan1): device state change: 4 -> 5 (reason 0)
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1/wireless): connection 'Wifi' has security, and secrets exist.  No new secrets needed.
Oct  8 23:10:17 computer NetworkManager: <info>  Config: added 'ssid' value 'Wifi'
Oct  8 23:10:17 computer NetworkManager: <info>  Config: added 'scan_ssid' value '1'
Oct  8 23:10:17 computer NetworkManager: <info>  Config: added 'key_mgmt' value 'WPA-PSK'
Oct  8 23:10:17 computer NetworkManager: <info>  Config: added 'psk' value '<omitted>'
Oct  8 23:10:17 computer NetworkManager: nm_setting_802_1x_get_pkcs11_engine_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Oct  8 23:10:17 computer NetworkManager: nm_setting_802_1x_get_pkcs11_module_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Oct  8 23:10:17 computer NetworkManager: <info>  Activation (wlan1) Stage 2 of 5 (Device Configure) complete.
Oct  8 23:10:17 computer NetworkManager: <info>  Config: set interface ap_scan to 1
Oct  8 23:10:17 computer kernel: [ 5537.040146] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c0 with error -108.
Oct  8 23:10:17 computer kernel: [ 5537.040169] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c4 with error -108.
Oct  8 23:10:18 computer kernel: [ 5538.040114] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c0 with error -108.
Oct  8 23:10:18 computer kernel: [ 5538.040137] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c4 with error -108.
Oct  8 23:10:19 computer kernel: [ 5539.041657] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c0 with error -108.
Oct  8 23:10:19 computer kernel: [ 5539.041670] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x30c4 with error -108.
Oct  8 23:10:20 computer NetworkManager: <info>  (wlan1): supplicant connection state:  disconnected -> scanning
Oct  8 23:10:20 computer kernel: [ 5539.723186] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x3040 with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723211] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x3040 with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723233] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x3040 with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723252] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x3040 with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723272] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723391] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723509] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723627] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723746] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x308c with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.723853] phy6 -> rt2x00usb_regbusy_read: Error - Indirect register access failed: offset=0x0000308c, value=0xffff8800
Oct  8 23:10:20 computer kernel: [ 5539.852346] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x3040 with error -108.
Oct  8 23:10:20 computer kernel: [ 5539.852370] phy6 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x3040 with error -108.