#979622 Wayland: No image on external display when reconnecting

Package:
kscreen
Source:
kscreen
Description:
KDE monitor hotplug and screen handling
Submitter:
Oliver Sander
Date:
2021-02-24 09:15:03 UTC
Severity:
normal
#979622#5
Date:
2021-01-09 06:57:06 UTC
From:
To:
Apologies if I am not reporting this for the correct package.

I try the following steps:

1) Reboot my laptop (ThinkPad X1 Yoga) with external monitor plugged in.
    The external monitor works as expected.
2) At the SDDM prompt, log into Plasma Wayland.
    The external monitor still works as it should.
3) Disconnect the external monitor
    Still everything appears to work as it should.
4) Reconnect the monitor -- it remains black and tells me 'no signal'
    Nevertheless, the system settings dialog shows me that the
    external display is correctly recognized.  From looking
    at that dialog everything seems to be in order.
5) Log out of Plasma Wayland, and log back in.
6) The external display is back!

This does not happen with Plasma X11.
#979622#10
Date:
2021-02-24 08:51:09 UTC
From:
To:
I still see this with current Testing, but now I sometimes have
the same problem with X11 too.  So I guess it is likely that this
is not a Plasma problem but rather a kernel one.

Please feel free to close this.  Thanks for your work on Debian.