Alongside the #5 I can see the following:
1. If the HDMI is connected during boot, gnome-shell starts normally, I can see
the login screen on the HDMI monitor.
1a. If the HDMI is disconnected during boot, gnome-shell fails with
Sep 13 08:05:22 mtk-genio org.gnome.Shell.desktop[1452]: Failed to setup: No
GPUs with outputs found
Sep 13 08:05:22 mtk-genio gnome-session[1412]: gnome-session-binary[1412]:
WARNING: App 'org.gnome.Shell.desktop' exited with code 1
Sep 13 08:05:22 mtk-genio gnome-session-binary[1412]: WARNING: App
'org.gnome.Shell.desktop' exited with code 1
Sep 13 08:05:22 mtk-genio gnome-session-binary[1412]: Unrecoverable failure in
required component org.gnome.Shell.desktop
2. When after 1.a I connect the HDMI, I can see fbdev on the HDMI monitor, but
gnome-shell is not restarted. gdm systemd unit is "active/running". Because
gnome-shell is still failing and not restarted when HDMI is connected, we don't
see the desktop on the HDMI monitor.
drm_info reports the HDMI monitor as `connected` and `link-status=good` every
time I connect the HDMI monitor.
/sys/class/drm/card0-HDMI-A-1/{enabled,connected} are enabled and connected.
Attached: journalctl starting boot without HDMI, then connect HDMI.
** Attachment added: "no-hdmi"
https://bugs.launchpad.net/ubuntu/+source/webbrowser-app/+bug/2044664/+attachment/5816794/+files/no-hdmi
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to webbrowser-app in Ubuntu.
https://bugs.launchpad.net/bugs/2044664
Title:
HDMI plugin after boot, but display can't work
Status in webbrowser-app package in Ubuntu:
Confirmed
Bug description:
[Summary]
HDMI plugin but display can't work after boot under HDMI only display
[Reproduce]
1. Set display configuration as single HDMI only
2. Boot into the system without plugging HDMI cable
3. Ensure system is booted (check it by debug console), then plug HDMI cable
4. Check the image on HDMI monitor
[Expected result]
Ubuntu desktop should be shown on HDMI monitor
[Actual result]
Ubuntu desktop was not shown on HDMI monitor
[Fail Rate]
100%
[Additional information]
Platform: Mediatek Genio1200 EVK
Ubuntu Version: 22.04.2 LTS
Image: baoshan-classic-desktop-2204-x01-20231005-133.tar.xz
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/webbrowser-app/+bug/2044664/+subscriptions
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