This bug is caused by some component being created without a 'parent' device being declared, which causes the search for the bus the device is on to fail since it doesn't anticipate devices without a parent.
You can check for the offending device thus: $ lshal | awk 'BEGIN {parent=0; udi=""} $1 ~ /^udi/ {if (parent==0 && udi!="") {print udi;} udi=$3; parent=0} $0 ~ /info\.parent/ {parent=1}' '/org/freedesktop/Hal/devices/bluetooth_test' '/org/freedesktop/Hal/devices/computer' In the results above two devices are listed without an info.parent. The 'bluetooth_test' device is the problem here. It may be different in other cases. 'computer' is the root device and is the only one that ought not to have a parent. The attached patch adds a try...catch block that sets an artificial info.parent for any device that doesn't declare one. It can be applied to the existing file easily. Download the patch file to the Desktop and then apply it to the existing file: $ cd /usr/share/hal/device-manager $ sudo sh -c "patch -p0 < /home/${USER}/Desktop/DeviceManager.py.diff" patching file DeviceManager.py Now when running hal-device-manager from a terminal you should see something like: $ hal-device-manager Setting parent for /org/freedesktop/Hal/devices/bluetooth_test Setting parent for /org/freedesktop/Hal/devices/bluetooth_test and the GUI will start as expected. ** Attachment added: "Fix for KeyError cause by device with missing info.parent" http://launchpadlibrarian.net/14624970/DeviceManager.py.diff -- [apport] hal-device-manager crashed with KeyError in update_tab_device() https://bugs.launchpad.net/bugs/119757 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs