Hi,
[Focal, Thinkpad T480s, 8550u/intel igpu]
Unfortunately I suspect this:
* Fix no picture from HDMI when it's plugged after boot (LP: #1924238)
- drm/i915/display: Handle lane polarity for DDI port
in *-1024 OEM 5.10 kernel, that I do use in Focal, did break HDMI hotplug after
GNOME is loaded.
HDMI works if plugged when at GDM login screen and then in GNOME itself.
Additionally, my laptop's sleep seems to be broken (I don't remember if this
happens when HDMI is working or not).
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https://bugs.launchpad.net/bugs/1924238
Title:
Fix no picture from HDMI when it's plugged after boot
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