interlinked second screen is switched on althogh there is none - macBook Pro 2010 - ubuntu 20.4 LTS, 18.4 LTS

[Jochen Roddewig]

On MacBook Pro (2010) Ubuntu 20.4.1 LTS and 18.4.5 LTS recognizes a second interlinked screen which doesn't exist. This happens also in the Try mode when Ubuntu sill isn't installed and also after update. You can push the mousecurser from the left (2) to the right (1) screen or you can change in the screen in the settings. But then you can do nothing, because the setting window comes on that screen which doesn't esist. You even can not shutdown. If you set the computer to only one screen, the setting is reset to the former setting with the two screens. But mostly you can't confirm the setting because the screen turn black for more then 10 seconds. I found a workaround by starting the recovery version.
3,7GiB, Intel core i5CPU m520 2.4GHz x 4, graphic llvmpipe (LLVM 10.0.0, 128 bits, GNOME 3.28.2 64 bit
The computer sent no error message.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1911245/+editstatus and add the package name in the text box next to the word Package.

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