Well the drive I used was never graced by windows :). Before I replaced the original drive, I booted it just once to install bios update.

Very unpleasant experience overall, especially when I **had to** accept macafee and bing TOS just to get into my machine.

I have no idea why your specific problem happened but I can tell you that windows 8 likes to mess with the MBR in a REALLY annoying way. And I've personally had a lot of problems with UEFI on windows 8 machines.

I,ve just got zenbook ux32ln (haswell/nvidia based ultrabook) and ran into some unexpected issues while setting up fedora 20.

For some reason xotg ran in software accelerated mode, even though i915 module was loaded. Poking through logs eventually shown that /dev/dri/card0 was missing.

Eventually, I enabled uefi-csm (bios compatibility mode) in uefi/bios and lo!, all problems disappear.

Question is why?


UEFI breaks igpu drivers, why?