vga_switcheroo switching on HP Envy 13

[Ilya Ilembitov <ilembitov@gmail.com>]

Hi, all.

I have installed Debian Testing amd64 on my HP Envy 13, which has two GPUs - ATI Mobility HD 4330 and Intel GMA 4500MHD. Which means, I need some kind of switching through vga_switcheroo.

I've tried following this guide (http://linuxenvy.blogspot.com/2011/01/tackling-switchable-graphics.html) for Ubuntu. I get this

cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory
cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory
[: 96: unexpected operator
[: 96: unexpected operator
[: 96: unexpected operator

[: 96: unexpected operator

What do I do?