Comment # 15 on bug 1119621 from sep hoogzaad

(In reply to Takashi Iwai from comment #14)
> The boot logo carried from EFI is the intentional behavior, BTW.
> This is a new feature for "flicker-less" boot on the recent kernel, enabled
> via CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER option.
> 
> Might this have some negative effect?  This needs to be checked, perhaps...



Yesterday i tried the drm-tip kernel. This is without the
CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER option.

> git clone git://anongit.freedesktop.org/drm-tip
> make defconfig
> make
> sudo make modules_install
> sudo make install

This is with kernel version 5.0.0, r2. The problem was the same, like in the
4.20.3 kernel. With "i915.fastboot=1" booting correct. Without this kernel
parameter: no screen, just some flickering. I also found that the following
commands gave the same flickering screen from which i can not recover in an
normal way:
> xset dpms force off
> xset dpms force standby
> xset dpms force suspend

Maybe this is related, since it gives the same effect.

I will report these two bugs (booting and the xset) also at:
https://01.org/linuxgraphics/documentation/how-report-bugs
I will do this later and include a video of the screen. I will refer to this
report also. 


Note that none of this does happen with the 4.12.14 kernel from Opensuse Leap
15.0.