Here is a workaround that did the trick on my acer 7715 with GMA4500 chip: The following command has solved my problem. "sudo setpci -s 00:02.0 F4.B=00"
The best is to have this command executed automatically at start up. You can do that by including that command in your /etc/rc.local file. To achieve this start up pc the pc with a 10.04 Live USB / Live CD. Go into the /etc/rc.local of the installed ubuntu 11.04 on your HD and insert "sudo setpci -s 00:02.0 F4.B=00" (without quotes) before the exit 0 command. My rc.local looks like this: #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. sudo setpci -s 00:02.0 F4.B=00 exit 0 Hope this will solve problem. Proudly copied from Angel Zone on: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/752165 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/779166 Title: Upgrade to version 11.04, disable the laptop display back light To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/779166/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
