I never had this bug until yesterday. "acpi_backlight=vendor" and/or the "echo 0 >/proc/sys/kernel/nmi_watchdog" solution didn't work for me. I couldn't install the latest mainline kernel, because of my restricted broadcom WiFi driver I'm depending on.
Workaround for me was: Disable Virtualization Features of my Intel Core i7 in BIOS. I think I can live without virtualization features for some time. But in future I want to use VirtualBox, where these features are necessary. System: Thinkpad S531 Linux: Xubuntu 13.04 Kernel: 3.8.0-31 -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
