Comment 6 for bug 221427

Same, or at least similar experience. Distribution Upgrade hung up and inactive after several complaints, with 2 minutes to go installing, and never got to cleanup and reboot.

debug log sez:

Jun 12 11:15:59 LittleBlackDesk NetworkManager: <debug> [1213290959.814895] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/storage_serial_ASUS_Flash_HS_COMBO_000022272228_0_1').
Jun 12 11:16:42 LittleBlackDesk NetworkManager: <debug> [1213291002.096119] nm_print_open_socks(): Open Sockets List:
Jun 12 11:16:42 LittleBlackDesk NetworkManager: <debug> [1213291002.096144] nm_print_open_socks(): Open Sockets List Done.
Jun 12 11:17:27 LittleBlackDesk audio[16754]: audio.conf: Key file does not have key 'Enable'
Jun 12 11:17:27 LittleBlackDesk audio[16754]: audio.conf: Key file does not have key 'Disable'
Jun 12 11:17:27 LittleBlackDesk audio[16754]: add_service_record: got record id 0x10000
Jun 12 11:17:27 LittleBlackDesk audio[16754]: audio.conf: Key file does not have key 'Disable'
Jun 12 11:17:27 LittleBlackDesk audio[16754]: audio.conf: Key file does not have group 'A2DP'
Jun 12 11:17:27 LittleBlackDesk last message repeated 3 times
Jun 12 11:17:27 LittleBlackDesk audio[16754]: SEP 0x806d5e0 registered: type:0 codec:0 seid:1
Jun 12 11:17:27 LittleBlackDesk audio[16754]: add_service_record: got record id 0x10001
Jun 12 11:17:27 LittleBlackDesk audio[16754]: add_service_record: got record id 0x10002
Jun 12 11:17:27 LittleBlackDesk audio[16754]: add_service_record: got record id 0x10003

user log sez:

Jun 12 10:41:31 LittleBlackDesk cupsd[20285]: *** WARNING *** The program 'cupsd' uses the Apple Bonjour compatibility layer of Avahi.
Jun 12 10:41:31 LittleBlackDesk cupsd[20285]: *** WARNING *** Please fix your application to use the native API of Avahi!
Jun 12 10:41:31 LittleBlackDesk cupsd[20285]: *** WARNING *** For more information see <http://0pointer.de/avahi-compat?s=libdns_sd&e=cupsd>
Jun 12 11:16:41 LittleBlackDesk dhcdbd: Started up.

anything else that might help --- ask (it's all Greek to this newbie)