https://bugs.kde.org/show_bug.cgi?id=395759

            Bug ID: 395759
           Summary: Monitor Displays refresh rate changes when connecting
                    an HDMI cable.
           Product: systemsettings
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: 842m...@gmail.com
  Target Milestone: ---

The laptop is an HP envy x360. For this laptop if I set the refresh rate to be
59.93Hz I can't notice any flickering, but for 60.01Hz or 40.01Hz I can notice
flickering.

On startup the refresh rate is set to "auto", but I don't notice any
flickering. Then when I connect an HDMI cable to extend my display to a second
monitor I can notice flickering. When I look at the refresh rate, it's set to
Auto. So I set it to 59.93 and the flickering goes away. (This doesn't affect
the extended monitor in any way).

If I disconnect (or also reconnect) the HDMI cable, the refresh rate is changed
to auto and I can see flickering.

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