Comment # 3
on bug 108615
from Phil Turmel
I have what is likely a related problem -- any change to resolution or re-enabling an output on my system, via xrandr or the equivalent KDE dialog, yields a black screen and/or artifacts from the framebuffer console. When multiple monitors are enabled, the affected outputs are black until the mouse pointer moves in their region, yielding artifacts plus *correct* mouse pointer. Until recently, operation was restored solely by restarting X. With kernel 4.19.3, operation can be restored by switching to a text console (all connected outputs turn on) and switching back to X. The phenomenon occurs on all monitor ports, on the dock or not, whether docked or not, and both before and after suspend/resume. Laptop is an HP ZBook 17 with GK107GLM (K1100M) with gentoo unstable: Linux corvus 4.19.3 #305 SMP PREEMPT Wed Nov 21 12:21:12 EST 2018 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux x11-base/xorg-server-1.20.3 x11-drivers/xf86-video-nouveau-1.0.15-r1 media-libs/mesa-18.3.0_rc3 x11-libs/libdrm-2.4.96
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