Hello Brian: Although the system won't boot with the device plugged in, the system doesn't initially lock up when I just plug the USB NIC into the system. It seems I have to perform an action (e.g. launching a web browser) that will ask the system to access the network. It usually takes about 30 seconds to a minute for the system to lock up in full GUI mode (i.e. run level 5) after I plug in the USB NIC if I attempt to access the network (by launching a web browser, attempting to access the update manager, etc). In the virtual terminal, I captured this log file immediately after plugging in the USB device, but the last two entries only displayed on the console vs. getting captured in the txt file. Here's what I captured: Apr 27 17:02:44 localhost gconfd (tdorris-5192): Resolved address "xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only configuration source at position 0 Apr 27 17:02:44 localhost gconfd (tdorris-5192): Resolved address "xml:readwrite:/home/tdorris/.gconf" to a writable configuration source at position 1 Apr 27 17:02:44 localhost gconfd (tdorris-5192): Resolved address "xml:readonly:/etc/gconf/gconf.xml.defaults" to a read-only configuration source at position 2 Apr 27 17:02:44 localhost gconfd (tdorris-5192): Resolved address "xml:readonly:/var/lib/gconf/debian.defaults" to a read-only configuration source at position 3 Apr 27 17:02:44 localhost gconfd (tdorris-5192): Resolved address "xml:readonly:/var/lib/gconf/defaults" to a read-only configuration source at position 4 Apr 27 17:02:48 localhost kernel: [ 86.216000] NET: Registered protocol family 10 Apr 27 17:02:48 localhost kernel: [ 86.216000] lo: Disabled Privacy Extensions Apr 27 17:02:48 localhost kernel: [ 86.216000] ADDRCONF(NETDEV_UP): eth0: link is not ready Apr 27 17:02:56 localhost kernel: [ 93.628000] ondemand governor failed to load due to too long transition latency Apr 27 17:03:01 localhost gconfd (tdorris-5192): Resolved address "xml:readwrite:/home/tdorris/.gconf" to a writable configuration source at position 0 Apr 27 17:04:44 localhost kernel: [ 199.360000] usb 1-1: new full speed USB device using uhci_hcd and address 2 Apr 27 17:04:44 localhost kernel: [ 199.512000] usb 1-1: configuration #1 chosen from 1 choice Apr 27 17:04:45 localhost kernel: [ 200.264000] ubuntu/wireless/at76/at76c503.c: Atmel at76c50x USB Wireless LAN Driver 0.14beta1 loading Apr 27 17:04:45 localhost kernel: [ 200.344000] usbcore: registered new interface driver at76_usb Apr 27 17:04:48 localhost kernel: [ 202.624000] usb 1-1: reset full speed USB device using uhci_hcd and address 2 Apr 27 17:04:48 localhost kernel: [ 202.772000] usb 1-1: device firmware changed Apr 27 17:04:48 localhost kernel: [ 202.772000] usb 1-1: USB disconnect, address 2 Apr 27 17:04:48 localhost kernel: [ 202.772000] ubuntu/wireless/at76/at76c503.c: wlan0 disconnecting Apr 27 17:04:48 localhost kernel: [ 202.772000] ubuntu/wireless/at76/at76c503.c: at76_usb disconnected Apr 27 17:04:48 localhost kernel: [ 202.884000] usb 1-1: new full speed USB device using uhci_hcd and address 3 Apr 27 17:04:48 localhost kernel: [ 203.036000] usb 1-1: configuration #1 chosen from 1 choice Apr 27 17:04:48 localhost kernel: [ 203.204000] ubuntu/wireless/at76/at76c503.c: firmware version 1.101.4 #84 (fcs_len 4) Apr 27 17:04:48 localhost kernel: [ 203.204000] ubuntu/wireless/at76/at76c503.c: device's MAC 00:0c:41:09:8c:84, regulatory domain FCC (U.S) (id 16) Apr 27 17:04:48 localhost kernel: [ 203.204000] ubuntu/wireless/at76/at76c503.c: registered wlan0 Now, here's what was left out of the file I captured, but was displayed on the console of the virtual terminal: [ 205.956000]ubuntu/wireless/at76/at76c503.c: 2522: assertion dev->istate == INIT failed [ 207.436000]ubuntu/wireless/at76/at76c503.c: 1784: assertion dev->curr_bss == NULL failed I went back to full GUI mode and started another tail session of /var/log/messages and attempted to capture another file. I launched update manager, and about 10seconds later, the system locked up. Here's what I got: Apr 27 17:09:35 localhost kernel: [ 554.052000] USB Mass Storage support registered. Apr 27 17:09:40 localhost kernel: [ 559.056000] scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 0.4 PQ: 0 ANSI: 2 Apr 27 17:09:40 localhost kernel: [ 559.060000] SCSI device sdb: 2001888 512-byte hdwr sectors (1025 MB) Apr 27 17:09:40 localhost kernel: [ 559.064000] sdb: Write Protect is off Apr 27 17:09:40 localhost kernel: [ 559.076000] SCSI device sdb: 2001888 512-byte hdwr sectors (1025 MB) Apr 27 17:09:40 localhost kernel: [ 559.076000] sdb: Write Protect is off Apr 27 17:09:40 localhost kernel: [ 559.076000] sdb: sdb1 Apr 27 17:09:40 localhost kernel: [ 559.084000] sd 2:0:0:0: Attached scsi removable disk sdb Apr 27 17:09:40 localhost kernel: [ 559.084000] sd 2:0:0:0: Attached scsi generic sg2 type 0 Apr 27 17:10:58 localhost kernel: [ 637.180000] usb 1-2: USB disconnect, address 4 Apr 27 17:11:45 localhost kernel: [ 684.024000] usb 1-1: new full speed USB device using uhci_hcd and address 5 Apr 27 17:11:45 localhost kernel: [ 684.176000] usb 1-1: configuration #1 chosen from 1 choice Apr 27 17:11:48 localhost kernel: [ 686.584000] usb 1-1: reset full speed USB device using uhci_hcd and address 5 Apr 27 17:11:48 localhost kernel: [ 686.732000] usb 1-1: device firmware changed Apr 27 17:11:48 localhost kernel: [ 686.732000] usb 1-1: USB disconnect, address 5 Apr 27 17:11:48 localhost kernel: [ 686.732000] ubuntu/wireless/at76/at76c503.c: wlan0 disconnecting Apr 27 17:11:48 localhost kernel: [ 686.732000] ubuntu/wireless/at76/at76c503.c: at76_usb disconnected Apr 27 17:11:48 localhost kernel: [ 686.844000] usb 1-1: new full speed USB device using uhci_hcd and address 6 Apr 27 17:11:48 localhost kernel: [ 686.996000] usb 1-1: configuration #1 chosen from 1 choice Apr 27 17:11:48 localhost kernel: [ 687.188000] ubuntu/wireless/at76/at76c503.c: firmware version 1.101.4 #84 (fcs_len 4) Apr 27 17:11:48 localhost kernel: [ 687.188000] ubuntu/wireless/at76/at76c503.c: device's MAC 00:0c:41:09:8c:84, regulatory domain FCC (U.S) (id 16) Apr 27 17:11:48 localhost kernel: [ 687.188000] ubuntu/wireless/at76/at76c503.c: registered wlan0 Then immediately the system locked up. Anyway, I hope what I captured here can get you pointed in the right direction. Thanks in advance, T. Dorris --- Brian Murray