i am having a problem with my hybrid gpu.i have tried to install vgaswitchheroo but when i try to switch between cards it gives  cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory
lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fd3 (rev a1)
uname -a
Linux SVS1512S1ES 3.5.0-28-generic #48~precise1-Ubuntu SMP Wed Apr 24 21:42:24 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04.2 LTS
Release:	12.04
Codename:	precise