HDMI hot plug not working any more in bullseye

From	"Harald" <debian-bug@lobo.uber.space>
Newsgroups	linux.debian.user
Subject	HDMI hot plug not working any more in bullseye
Date	2021-08-27 17:30 +0200
Message-ID	<CQLXS-7aq-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,

if just updated to bullseye and now, HDMI hot plug does not work any more.
I have a GeForce GTX 960 (AMD64 system) with a monitor connected through a DVI-D cable and a projector connected through a HDMI cable.
If I have the projector switched on at system startup, everything is fine, but if the projector is switch off at startup, I have no way to add it as display when switching it on afterwards.

With Debian Buster, this worked.

Using KDE, nvidia-driver.
Tried system settings of KDE and nvidia-settings. Both worked with Buster.

Any ideas how to get hot plug back to work or where to find additional hints?

Thanks,
Harald

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HDMI hot plug not working any more in bullseye "Harald" <debian-bug@lobo.uber.space> - 2021-08-27 17:30 +0200
  Re: HDMI hot plug not working any more in bullseye Nicolas George <george@nsup.org> - 2021-08-27 17:30 +0200
    Re: HDMI hot plug not working any more in bullseye harald@lobo.uber.space - 2021-08-27 18:10 +0200
    Re: HDMI hot plug not working any more in bullseye "Harald" <debian-bug@lobo.uber.space> - 2021-08-27 18:10 +0200
      Re: HDMI hot plug not working any more in bullseye Nicolas George <george@nsup.org> - 2021-08-27 19:00 +0200

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