i finally succeed in getting the intel driver running
Originally Posted by ksatta1
now lspci report my two vga chips and X is running fine with i915.
i still run ubuntu only. the solution was to use refind (on esp) instead of grub.
so i have a 200mb fat32 partition with refind, a directory "ubuntu" where i've put my kernel, initrd and a config file like this:
installed raring daily iso, ran ubiquity with -b switch to prevent grub from being installed as explained in garalndg's guide here : http://linuxmacbookproretina.blogspo...cbook-pro.html
"Boot using standard options" "root=UUID=<uuid string> ro quiet splash $vt_handoff"
"Boot using minimal options" "root=UUID=<uuid string> ro"
"Boot to shell" "root=UUID=<uuid string> ro text"
"Boot using recovery options" "root=UUID=<uuid string> ro recovery nomodeset"
it seems to me grub was doing something that prevent i915 and vgawitcheroo to be used.