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since the last kernel update for Ubuntu 13.04, the folder /sys/kernel/debug/vgaswitcheroo/switch is gone on my Laptop, an Acer Aspire 3820TG.

Checking the output of grep -i /boot/config-* tells me that my kernel supports switcheroo however, the file is gone (and yes, I checked that as root).

Can anybody please give me a hint? I almost checked the whole internet for an appropriate answer but nobody seems to have the same problem.

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I had the same problem, and I also looked everywhere, tried everything.

Finally I got it working installing the next packages:

i965-va-driver intel-gpu-tools xserver-xorg-video-intel-dbg xserver-xorg-video-radeon-dbg xserver-xorg-video-r128-dbg xserver-xorg-video-ati-dbg

note: using kernel 3.8.0-31-generic

I am not sure what did the trick but it worked, now I can see the /sys/kernel/debug/vgaswitcheroo/switch.

Good luck, Regards


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I installed that packages but it didn't help :( Im really frustraded with that, there is no solution in sight. Well, I hope some future kernel will fix the problem. – Eddy Oct 11 '13 at 23:26

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