[Bug 90951] HD4000: Display connected to displayport doesn't wake up when it's turn off and on or enters power saving mode

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=90951

--- Comment #2 from Thomas Mann <rauchwolke at gmx.net> ---
calling xset dpms force standby
and moving the mouse also works most of the time to wake up the screen after it
stays black instead of showing the desktop

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