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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2015314
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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2015314
Title:
Ubuntu 22.04 does not restore the screen on a KVM switch
Status in linux package in Ubuntu:
Incomplete
Bug description:
Ubuntu 22.04 on either of two HP small business PC.
1. an HP EliteDesk 800 G3 Mini PC with an i915 video controller using
Displayport to HDMI.
2. an HP 600 G1 desktop SFF with an i915 video controller, also using
Displayport to HDMI.
Both are connected to a KVM switch.
When I boot up I get a login and everything works fine, until I switch
between them. No image appears. There is a slight brightening of the
display after a few seconds, as if it's trying to enable video output,
but I have to unplug and replug the displayport connector at the back
of the computer to get the screen to come back.
journalctl -k shows these lines logged on the HP 600 G1:
Apr 04 20:55:42 demesne kernel: i915 0000:00:02.0: [drm] *ERROR* Unexpected
DP dual mode adaptor ID 20
Apr 04 20:55:42 demesne kernel: i915 0000:00:02.0: [drm] *ERROR* Unexpected
DP dual mode adaptor ID 20
on the EliteDesk 800 G3, the same message:
Apr 04 20:55:58 haven kernel: i915 0000:00:02.0: [drm] *ERROR*
Unexpected DP dual mode adaptor ID 20
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.19/+filebug/e70d8b1a-d357-11ed-b7a8-d485646cd9a4?
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.19/+filebug/26e2b774-d358-11ed-99a2-40a8f0305cb4?
Both systems are Ubuntu 22.04.2 LTS
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