https://bugs.kde.org/show_bug.cgi?id=493879

--- Comment #38 from Oleg Gorobets <[email protected]> ---
I am adding possible patch which does two things:

(1) Removes 'allOff' check which seems to be out of place. For one, output
configuration is different at this moment, leading to built-in monitor being
enabled (as mentioned in previous comments). Also, on a more generic note, it
is not clear why DPMS mode for one monitor should depend on others?

(2) Fixes pipeline 'active' flag which is set to false in
DrmBackend::addOutput(), but then re-enabled in DrmGpu::updateOutputs()

I have tested it and it completely fixes sleep and wake-up cycles for me. I
tested with closing lid and also with 'kscreen-doctor --dpms off' command,
which seem to be identical in result.

Dinolek, can you check if it solves the problem for you?

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