I'm having the same problem too after just upgrading to 18.04 on my
R554LA hardware. I've found that sometimes I actually see the login
screen, but then it immediately goes blank - as if the screen was turned
off using the blank display keys (Fn+F7). Once this happens, if I plug
in an HDMI cable connected to my TV, the screen turns on again, and will
remain on once I unplug the HDMI cable. This will survive a sleep/wakeup
event but not a reboot.
In my Xorg.0.log file, I see HDMI getting enabled (not sure if this is a
cause, an effect, or not relevant):
==========================
[ 2.798] (II) FBDEV: driver for framebuffer: fbdev
[ 2.798] (II) VESA: driver for VESA chipsets: vesa
[ 2.799] (II) intel(0): Using Kernel Mode Setting driver: i915, version
1.6.0 20151010
[ 2.799] (II) intel(0): SNA compiled: xserver-xorg-video-intel
2:2.99.917+git20160325-1ubuntu1.2 (Timo Aaltonen <tjaal...@debian.org>)
[ 2.799] (II) intel(0): SNA compiled for use with valgrind
[ 2.800] (WW) Falling back to old probe method for modesetting
[ 2.801] (WW) Falling back to old probe method for fbdev
[ 2.801] (II) Loading sub module "fbdevhw"
[ 2.801] (II) LoadModule: "fbdevhw"
[ 2.801] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 2.802] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 2.802] compiled for 1.18.4, module version = 0.0.2
[ 2.802] ABI class: X.Org Video Driver, version 20.0
[ 2.802] (WW) Falling back to old probe method for vesa
[ 2.803] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics
5500
[ 2.803] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2,
avx, avx2; using a maximum of 2 threads
[ 2.803] (II) intel(0): Creating default Display subsection in Screen
section
"Default Screen Section" for depth/fbbpp 24/32
[ 2.803] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[ 2.803] (==) intel(0): RGB weight 888
[ 2.803] (==) intel(0): Default visual is TrueColor
[ 2.804] (II) intel(0): Output eDP1 has no monitor section
[ 2.820] (--) intel(0): Found backlight control interface intel_backlight
(type 'raw') for output eDP1
[ 2.820] (II) intel(0): Enabled output eDP1
[ 2.820] (II) intel(0): Output HDMI1 has no monitor section
[ 2.820] (II) intel(0): Enabled output HDMI1
[ 2.820] (--) intel(0): Using a maximum size of 256x256 for hardware cursors
[ 2.820] (II) intel(0): Output VIRTUAL1 has no monitor section
[ 2.820] (II) intel(0): Enabled output VIRTUAL1
[ 2.820] (--) intel(0): Output eDP1 using initial mode 1366x768 on pipe 0
[ 2.820] (==) intel(0): TearFree disabled
[ 2.820] (==) intel(0): DPI set to (96, 96)
=======================================
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https://bugs.launchpad.net/bugs/1767556
Title:
Screen goes blank after booting
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