[Bug 111045] [CI][BAT] igt at kms_chamelium@(hdmi|dp)-hpd-fast|igt at kms_chamelium@dp-edid-change-during-suspend - fail - Failed assertion: igt_hotplug_detected(mon, HOTPLUG_TIMEOUT)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111045

--- Comment #34 from emersion <contact at emersion.fr> ---
(In reply to Imre Deak from comment #15)
> If unplugging a DP-alt display while there is an active modeset on it, and
> then replugging the DP-alt display, the HW/FW/driver won't signal the
> corresponding plug-in hotplug event until the mode is disabled.

What happens if legacy userspace doesn't react to hotplug events? We need to
re-enable the output automatically on hotplug. As of now, legacy userspace
won't work on DP-alt.

I'm leaning towards marking this as a kernel bug. If userspace doesn't disable
the mode, the kernel should re-enable it on hotplug.

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