I've a dual vga laptop (intel + ati) and I've upgraded my distro from 19 to 20.
Everything is working pretty well, but now I can't disable the discrete card using vgaswitcheroo (like I used to do with fedora 19).
I'm using the latest kernel avaible (3.12.6-300.fc20.x86_64) and right now I'm using the intel vga, but I would disable the discrete card.
# cat /sys/kernel/debug/vgaswitcheroo/switch
I always used this command turn off ati card:
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
But now, after the upgrade to Fedora 20, if I try to do this system crash with a kernel panic (I suppose).
Any suggestion to avoid this?
Are there others ways to disable the ati card? I just would to turn off it.
If there are some logs where I can look, tell me and I will post them!
Thanks a lot!