[Bug 107446] Monitor on 2nd DisplayPort is not initialized

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107446

--- Comment #18 from Cedric M <cedric at maion.com> ---
Created attachment 143122
  --> https://bugs.freedesktop.org/attachment.cgi?id=143122&action=edit
dmesg of 5.0.0 drm-tip failing to wake up external monitor, failing once when
forcing mode with xrandr, then succeeding the second time

This dmesg log shows the following sequence:

1. locking gnome-shell, which puts the monitors in standby mode

2. after a while, returning to the laptop and resuming work : the external
monitor tries to wake up but fails and returns to sleep

3. after a couple of minutes : forcing mode with xrandr : external monitor
tries to wake up, but this time it fails and returns to sleep... again

4. after a couple of minutes : trying to force mode with xrandr a 2nd time :
this time it succeeds

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