[Bug 67454] After suspend/resume, screen is black for all but the highest levels with i915 driver on MacBook Air 6,2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67454

--- Comment #76 from Can Kavaklıoğlu <eposta at cankavaklioglu.name.tr> ---
I have found some more information suggesting booting method may be the
culprit. I am using refind boot loader to dual boot Mac and Debian jessie/sid.
During boot sequence first refind screen is displayed and then the normal grub
screen. I thought this meant I was booting in bios mode. But today I learnt
this is not the case. http://www.rodsbooks.com/refind/bootmode.html It appears
the grub I am using is an efi aware grub, not the legacy bios grub. This
cleared my confusions about the Arch linux solution posted here.

Another point http://www.rodsbooks.com/ubuntu-efi/ says "Missing hardware
features—I've seen reports that Linux features such as screen brightness
control and suspend/resume may not work correctly when booting using EFI. I
don't use such features, so I can't comment personally."

It also appears to be tricky to get legacy grub working in this dual boot
scenario due to use of "protective MBR".

It is really amazing for me to see that booting method to effect the display
driver. So I thought maybe driver developers may be inspired by this experience
as well.

Anxiously waiting to get suspend my MacBook Air : (

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