> Date: Mon, 21 Dec 2015 18:03:14 +0800 > From: Glenn Faustino <[email protected]> > > On my Thinkpad x200, unplugging the power reset the brightness to the value > defined in /etc/wsconsctl.conf. This doesn't happen on my X220 though.
Must be the other way around. Unplugging will reset the brightness to the last value set using the brightness keys. Anyway, on older Thinkpads (such as the x200) the firmware doesn't provide an appropriate interface to coordinate the brightness level. You'll have to live with thise misfeature.
