Ok, so I have searched high and low for this and can't seem to come up with anything...
I have a Dell E6230 with a fresh install of Arch. Latest kernel as of this post.
Everything works fine, except one annoying problem. Whenever I unplug the AC Power, the LCD brightness acts weird. I can flip back and forth between webpage tabs for example. One white and one dark and the brightness is changing as I do that. Get's brighter when I flip to a light color, and darker when I flip to a dark color. It's crazy annoying. When I'm on AC power, it doesn't do that at all.
EDIT... One more thing. I do want to point out /sys/class/brightness/actual & max never change when I plug or unplug the power adapter. Also I have used acpi_backlight=vendor and the "dell_backlight" stuff never changes either. Happens all the same.
My dmesg: http://pastebin.com/1wSVDWNJ
What can I do or look for to help nail this one down?
Good lord. This stuff drives me crazy sometimes. The fix was to turn off the Auto Brightness Settings in the BIOS.
Last edited by skwid (2013-03-20 17:40:40)