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I was upgrading from 12.04 to 12.10 when the ability to move my windows disappeared. I did a hard reset and tried some dpkg --configure command lines to carry on the upgrade. I got some messages about read-only filesystems that makes me think one of my disks has an error and is remounting as read-only. My Ubuntu is installed into an encrypted partition. Now I cannot boot into Ubuntu at all. The system hangs after I enter my password. I have managed to boot into a LiveCD and mount the partition by following the instructions here http://ubuntuforums.org/showthread.php?t=940904. AFAICT from the mounted /var/log/syslog the D-Bus won't start. My machine is a Lenovo W530 and I know some people have had problems with the Nvidia Optimus drivers. What can I do to fix my machine?

Here is a hopefully relevant part of my syslog:

Jun 28 15:22:29 W530 kernel: [   11.300775] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
Jun 28 15:22:29 W530 kernel: [   11.301621] init: dbus main process (800) terminated with status 1
Jun 28 15:22:29 W530 kernel: [   11.301637] init: dbus main process ended, respawning
Jun 28 15:22:29 W530 kernel: [   11.302354] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
Jun 28 15:22:29 W530 kernel: [   11.307981] init: Unable to connect to the system bus: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory
Jun 28 15:22:29 W530 kernel: [   11.319224] type=1400 audit(1372429349.255:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=919 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319231] type=1400 audit(1372429349.255:3): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=784 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319242] type=1400 audit(1372429349.255:4): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=816 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319471] type=1400 audit(1372429349.255:5): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=919 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319493] type=1400 audit(1372429349.255:6): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=784 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319527] type=1400 audit(1372429349.255:7): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=816 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319627] type=1400 audit(1372429349.255:8): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=919 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319635] type=1400 audit(1372429349.255:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=784 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.319692] type=1400 audit(1372429349.255:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=816 comm="apparmor_parser"
Jun 28 15:22:29 W530 kernel: [   11.351379] init: plymouth-upstart-bridge main process (932) terminated with status 1
Jun 28 15:22:29 W530 kernel: [   11.351563] init: network-interface (lo) pre-start process (936) terminated with status 1
Jun 28 15:22:29 W530 kernel: [   11.358424] init: bluetooth main process (973) terminated with status 1
Jun 28 15:22:29 W530 kernel: [   11.358435] ppdev: user-space parallel port driver
Jun 28 15:22:29 W530 kernel: [   11.358447] init: bluetooth main process ended, respawning
Jun 28 15:22:29 W530 kernel: [   11.364220] init: avahi-daemon main process (1002) terminated with status 255
Jun 28 15:22:29 W530 kernel: [   11.364238] init: avahi-daemon main process ended, respawning
Jun 28 15:22:29 W530 kernel: [   11.366075] Bluetooth: Core ver 2.16
Jun 28 15:22:29 W530 kernel: [   11.366091] NET: Registered protocol family 31
Jun 28 15:22:29 W530 kernel: [   11.366092] Bluetooth: HCI device and connection manager initialized
Jun 28 15:22:29 W530 kernel: [   11.366094] Bluetooth: HCI socket layer initialized
Jun 28 15:22:29 W530 kernel: [   11.366095] Bluetooth: L2CAP socket layer initialized
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I tried running fsck on the partition and it said it fixed something but I still can't boot with the same symptoms. –  John Jun 28 '13 at 19:26
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