Comment 22 for bug 776999

It affects me too in the following configuration: Ubuntu 11.04 64-bit, Lenovo Thinkapd W520 , dedicated graphic Nvidia 2000M selected in BIOS, Nvidia proprietary driver installed. Running in the docking station oder with power supply no issues, running on battery the boot process stops at the line: "... <30>udev[84]: starting version 167".
The same behaviour occures if using the experimental Nuveau driver.
Running without issues on battery wenn integrated IntelHD 3000 graphic selected in BIOS.
Suggested workaround by forcing pm-utils to version 1.3.x did not work for me...