Ubuntu
xfwm4 package

  1. Focal (20.04)
  2. Bug #1873895
  3. Comment #28

Comment 28 for bug 1873895

Revision history for this message
TJ (tj) wrote : Re: Regression: block staircase display with side-by-side monitors

Reproducing this:

$ xrandr -d :0.0 --output HDMI-A-0 --left-of eDP
$ xrandr -d :0.0 --output HDMI-A-0 --right-of eDP

No problem with:

$ xrandr -d :0.0 --output HDMI-A-0 --above eDP
$ xrandr -d :0.0 --output HDMI-A-0 --below eDP

The affected and unaffected laptops each have identical kernel log entries about IRQ 7 and SADs count so I don't think those are related to this.