Comment 31 for bug 1813663

Revision history for this message
Stéphane Guillard (sg2) wrote : Re: [Bug 1813663] Re: External monitors does not work anymore 4.15.0-44

As stated in bug 1813831 thread, the issue is related to a change in the
graphic driver's DPMS sequence. It was introduced in 4.15.0-44, and
reverted in 4.15.0-45 made available for testing in the other bug's thread.

Meaning that it's not related to thunderbolt docks, nor docks at all,
but to the display driver initializing the screen(s) through DPMS. My
Dell 9370 shows the issue on each boot with -44  even when not connected
to any external peripheral / dock / display, just with its internal screen.

The issue is totally gone with -45.

The DPMS change revert was already committed to upstream kernel patch train.