[Kernel-packages] [Bug 1291371] Re: thinkpad screen dims after unplugging external display, and won't re-brighten without leaving X

i face same problem with thinkpad T430U using same work around of Ctrl+alt+ f1 to increase brightness and back with ctrl+alt+f7 the brightness controls are non responsive i am running ubuntu 14.04 LTS. however my kernel is also 3.13. -- You received this bug notification because you are a member

[Kernel-packages] [Bug 1291371] Re: thinkpad screen dims after unplugging external display, and won't re-brighten without leaving X

** Description changed: When I un-plug the external VGA cable from my Thinkpad X200s, the screen dims. Hitting Fn-Home (the brightness-increase key) does nothing. Suspending and resuming doesn't reset this, though a reboot will allow me to use the brightness controls again while in the PO