https://bugs.freedesktop.org/show_bug.cgi?id=64746 --- Comment #12 from Emil Velikov --- (In reply to comment #7) > cat /sys/kernel/debug/vgaswitcheroo/switch > 0:DIS: :Pwr:0000:01:00.0 > 1:IGD:+:Pwr:0000:00:02.0 > > don't seem switched? > > i tried > echo DIS > /sys/kernel/debug/vgaswitcheroo/switch > > but the screen get completly black... > With "screen" I believe that you're talking about the laptop LVDS? In that case it seems like the nv card is not wired to that output, thus you'll need to do the following * forget about vgaswitcheroo * Follow the instructions on our wiki [1] [1] http://nouveau.freedesktop.org/wiki/Optimus/ -- You are receiving this mail because: You are the assignee for the bug.