Comment 21 for bug 554718

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Scott Talbert (swt-techie) wrote :

Further troubleshooting on this...the empty /proc & /sys occurs during the karmic->lucid upgrade when "udevadm trigger --subsystem-match=block --action=change" is called AFTER the devicekit-disks package has been removed. I can reproduce this outside the upgrade installer by manually removing devicekit-disks and then running the udevadm trigger command.