[Bug 105549] Black/blank screen at boot (last message line: fb: switching to inteldrmfb from EFI VGA) unless i915.modeset=0 is set

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105549

--- Comment #7 from Seweryn Kokot <sewkokot at gmail.com> ---
Created attachment 138168
  --> https://bugs.freedesktop.org/attachment.cgi?id=138168&action=edit
dmesg, lsmod, lspci -v

I checked that kernel 4.9 hangs at fb: switching to inteldrmfb from EFI VGA,
but in this case the screen does not get black, I see all the messages. I need
to press power button to reset.

Then I compiled kernel 4.4 and in this case without any nomodeset or
i915.modeset=0 I get login prompt. I attach dmesg when kernel 4.4 is running.
Note that in dmesg there is no line about switching to inteldrmfb from EFI VGA
after which the hang (kernel 4.9) or black screen (kernel 4.14, 4.15) happens.

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