blank screen on boot with i915/DRM_FBDEV_EMULATION

From	Florian Zumbiehl <florz@florz.de>
Newsgroups	linux.kernel
Subject	blank screen on boot with i915/DRM_FBDEV_EMULATION
Date	2016-03-26 12:40 +0100
Message-ID	<rgUJs-c3-15@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Show all headers | View raw

Hi,

I just compiled a new kernel version 4.4.5, replacing a previous 4.1.9 for
my thinkpad x40, which replaced CONFIG_DRM_I915_FBDEV with
CONFIG_DRM_FBDEV_EMULATION--now, when the i915 and fbcon modules get loaded
during boot, the screen goes blank (with backlight still on), which didn't
happen with the old kernel.

The funny thing is that starting an X server makes text reappear on the
console!? (And the X server also works just fine, as far as I can tell so
far ...)

i915 is loaded with modeset=1 (I remember I had some problem without it
with some earlier kernels, I don't really remember the details anymore
...).

Any hints what to try? Any further information that could be useful?

Regards, Florian

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

blank screen on boot with i915/DRM_FBDEV_EMULATION Florian Zumbiehl <florz@florz.de> - 2016-03-26 12:40 +0100
  Re: blank screen on boot with i915/DRM_FBDEV_EMULATION Daniel Vetter <daniel@ffwll.ch> - 2016-03-29 14:10 +0200
    Re: blank screen on boot with i915/DRM_FBDEV_EMULATION Florian Zumbiehl <florz@florz.de> - 2016-03-29 18:50 +0200
      Re: [Intel-gfx] blank screen on boot with i915/DRM_FBDEV_EMULATION Daniel Vetter <daniel@ffwll.ch> - 2016-03-30 08:40 +0200
        i951 ERRORs and WARN_ON()s (was: blank screen on boot with  i915/DRM_FBDEV_EMULATION) Florian Zumbiehl <florz@florz.de> - 2016-03-31 01:20 +0200

csiph-web