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.