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 Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
