I am still having this problem even after adding 'acpi_backlight=vendor' to grub cmd option, but now crash occurs less often. This problem also occurs when brightness changes due to power on/off. In this case(when frozen) if I remove or plug-in charger, brightness level changes but nothing else work. Sometime I notice that Brightness Indicator doesn't display brightness level correctly.
Ubuntu 13.04 (64-bit), ATI Mobility Radeon HD 5400 series -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1007765 Title: brightness adjusting crashes system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1007765/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
