I'm affected too: ThinkPad X200 and X220 w/ Ubuntu 12.04. In fact this is a kernel bug and there already is a patch in mainline: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ff413195e830541afeae469fc866ecd0319abd7e
I can confirm that the patch works for me an some more Thinkpad users when applied to the current Precise kernel 3.2.0-27.43 and I *strongly* suggest to integrate this patch in the Precise kernel. Kernel packages including this patch can be found in my PPA: https://launchpad.net/~linrunner/+archive/thinkpad-extras -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/841315 Title: on thinkpad-acpi devices, brightness setting ommits most steps To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/841315/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
