[Bug 110863] Blank screen after locking and vt-switch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110863

--- Comment #24 from Tomas Janousek <tomi at nomi.cz> ---
I can confirm that my problems are fixed as of 5.3.7, and I'm fairly certain
it's due to
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=26b1d3b527e7bf3e24b814d617866ac5199ce68d,
because when I rename the Xorg binary to tmp-Xorg, I can reproduce it again.

I can reproduce it reliably using this sequence of events:

1. connect laptop to ThinkPad Ultra Dock
2. activate both external displays using xrandr
3. deactivate external displays again
4. suspend laptop
5. resume laptop
6. xset dpms force off

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