m...@office ~$ zcat /proc/config.gz | grep -i switch
CONFIG_VGA_SWITCHEROO=y

m...@office ~$ uname -a
Linux office 2.6.34-ARCH #1 SMP PREEMPT Mon Jul 5 22:12:11 CEST 2010 x86_64 Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz GenuineIntel GNU/Linux

m...@office ~$ ls /sys/kernel/debug/
bdi  dri  hid  mce  tracing  usb  x86  gpio  sched_features



I'm expecting there to be a vgaswitcheroo directory here so I can perform GPU switching.

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