20.04.1 goes fully blank (screens) after replugging 2nd monitor

[Daniel LaSalle]

Using 20.04.1-latest and using 2x monitors, 1x using DVI and 1x using HDMI, if I unplug the HDMI one while the system is running, displays will fallback to 1 screen and that is good.

But while this system is still running, if/when I replug that same 2nd screen that I took out and using the same HDMI port both screens turn blank and system goes into lala land requiring a manual/hard restart is required to fix this.

While the screens are blank, the system is not hung it simply lost it's displays.

[Daniel LaSalle (daniellasalle)]

PS: Am using 1x monitor in portrait and the other in reverse portrait. I have not tried reproducing this with 2x monitors using "regular" resolutions.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1897830

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Daniel van Vugt (vanvugt)]

Also, after the problem happens next and immediately after restarting, please run:

  journalctl -b-1 > prevboot.txt
  lspci -kv > lspci.txt

and attach the resulting text files here.

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]