The problem is caused by the following file.

/sys/devices/pci0000:00/0000:00:03.0/0000:01:00.0/vpd   
(MegaRAID SAS 9240 DEVPATH=/devices/pci0000:00/0000:00:03.0/0000:01:00.0)
-rw------- 1 root root  32768 2011-12-02 14:51 vpd

executing the command will cause halting: sudo cat vpd
The vpd file can be only read/write by root, so it explains why running 
udev_resource with normal user can't reproduce this problem.

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https://bugs.launchpad.net/bugs/897773

Title:
  [Acer AR320 F1 and Acer AR160 F1] Halting shortly after booting with
  10.04.3

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