Just recently I had got my hybrid graphics working with DRI_PRIME=1. I obviously have the open source drivers. Now for some reason that I can't figure out it has stopped working. xrandr ...
I have enable switcheroo in kernel config . Why is there not /sys/kernel/debug/vgaswitcheroo/switch ? Linux ubuntu-raid-w500 2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011 x86_64 ...