https://bugs.kde.org/show_bug.cgi?id=490623

--- Comment #5 from TraceyC <kde...@tlcnet.info> ---
I'm having similar issues. They started with Plasma 6.1.5 and continue with
6.2.2. If this is completely unrelated, let me know and I'll open a separate
report. 

Hardware setup:
Laptop connected via USB-C dock to 2 external monitors (DP & HDMI)
All 3 displays were working OK at system boot.
Sleep was invoked with a shortcut, laptop was disconnected from the dock.
Laptop was woken from sleep. I could hear system sounds, but the built-in
screen received no display. 
After plugging the laptop into the dock, the external monitors had a display
but not the built in screen. (Display Configuration showed the built-in screen
enabled.)
I was not able to get to TTY, the laptop display remains black (no power).
The only way to get a display on the laptop screen again is to reboot no matter
what else I do

I tried these workarounds but nothing changed:
- Disabling and re-enabling the laptop screen in Display Configuration
- Reseating the dock cable
- Reseating the HDMI cable from the dock (which has resolved similar issues in
the past)
- Changing display priorities

Even with no external displays active, with only the laptop screen active, the
laptop screen has no display. 

Operating System: Solus 4.6
KDE Plasma Version: 6.2.2
KDE Frameworks Version: 6.7.0
Qt Version: 6.7.3
Kernel Version: 6.11.5-307.current (64-bit)
Graphics Platform: Wayland
Processors: 16 × 11th Gen Intel® Core™ i7-11800H @ 2.30GHz
Memory: 62.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics
Manufacturer: Dell Inc.
Product Name: XPS 17 9710

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