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Whenever I use an external monitor ( Dell HD, same as in-built ) I get this annoying screen selection popup which I cannot make go away. Is there any particular process I can " Stop / Kill " to make this popup from flashing all the time ? I am using 20.04

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    Screen Selection Popup.. When it appears and when you select one of the option is it still appears??
    – PRATAP
    Dec 7, 2020 at 2:34
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    External monitor connected to laptop or desktop? Where is the popup appearing on native monitor/screen? Without choosing the option what would you like it to happen? "Mirror" "Join Displays" "External Only" "Built in Only"??
    – PRATAP
    Dec 7, 2020 at 2:42
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    Also try to first connect the HDMI cable and then try to turn on both laptop and external monitor just to confirm this problem appears when laptop is on and you are connecting external monitor..
    – PRATAP
    Dec 7, 2020 at 3:02
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    Oh ok.. So External Monitor is always connected. When you turn on laptop when external monitor is also turned on at login screen is it OK? Once you enter to GNOME DE whats the case??
    – PRATAP
    Dec 7, 2020 at 3:10
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    I dont know if you got past this point yet, but If identifying the process will help... do something like ps -eo pid,command >> withoutproblem.txt and ps -eo pid,command >> withproblem.txt then do a diff on the problem.txt files.... also pstree shows a tree of the parent processes, could be helpful.
    – WU-TANG
    Dec 7, 2020 at 5:56

1 Answer 1

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You should report it as a bug on your window manager project page, along with your dmesg output.(Assuming it's not your cable that's broken and constant reconnections triggering this... in that case, get a new cable!)

You can also try this How do I enable and disable GNOME extensions from the command line?

If you don't figure it out, or while you wait for a fix, you can use a different window manager:

sudo apt install gnome-flashback

or

sudo apt install xfce4

or

sudo apt install plasma-desktop

or

sudo apt install cinnamon

or

sudo apt install lxde

or... if you really want to get to know your system

sudo apt install wmaker

or

sudo apt install icewm

Select our window manager from the login screen by clicking on the small Ubuntu icon

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    I do have Plasma. The same problem occurs there and I can stop by killing the process Kscreen2. I am trying to find what to kill in default DE. Thanks.
    – user227495
    Dec 9, 2020 at 3:07

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