Hello, I had suffered from this bug, too, and can testify that updating the BIOS on my Dell Studio 1555 to the latest A13 version (http://www.dell.com/support/drivers/us/en/19/DriverDetails?driverId=R301502) has solved the problem.
-- Best Regards, Aleksander Adamowski http://olo.org.pl -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/CADTpmS5aFaadOwEuRiCxc=QQfpWW6_Jv+qkm=yzngk+s5t5...@mail.gmail.com

