Mouse cursor has inconsistent size and theme

[Vigleik Angeltveit]

In kubuntu 20.04, the mouse cursor changes size and style depending on which application, or part of application, it is hovering over. It is only sometimes respecting the choice of cursor theme selected in system settings.

As a result, the mouse cursor is sometimes comically small or comically large.

I only noticed this after hooking up an external monitor to my laptop. It might be okay on a single screen, or if all screens have the same size/resolution.

The attachment has 3 pictures, all with the McMojave Cursors theme, size 24, selected from system settings. (The problem is not specific to this theme; it's just an example.)

In the first picture, the cursor has the correct theme and the correct size.

In the second picture, the cursor appears to be from the Breeze cursor theme, but it still has the correct size.

In the third picture, the cursor appears to be from the Breeze cursor theme, and it also has the wrong size.

[Chris Guiver (guiverc)]

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 1875258

Also providing the application in use in your pdf example (necessary to know if it's GTK or Qt based) would also be useful.

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.

[Vigleik Angeltveit (vigleik-angeltveit)]

Thanks for the quick reply. I ran apport-collect 1875258. It returned a whole bunch of errors, is that normal?

Anyway, the program in the screenshots I provided was kate. GTK applications seem to be better. Chrome, which is its own thing, also has issues.

[Chris Guiver (guiverc)]

No, on Ubuntu, Kubuntu or any Ubuntu flavor `apport-collect` I would expect to run without issues or errors. I have encountered situations where I've used `sudo` to get around permissions issues with `ubuntu-bug` though,

[Vigleik Angeltveit (vigleik-angeltveit)]

I ran "sudo apport-collect 1875258", this time with no errors. It says "No additional information collected."

[Andrew Balsa (andrebalsa)]

I can confirm this bug in Kubuntu 20.04, installed on a Thinkpad X1 Carbon 2nd Gen. The cursor very annoyingly changes size, between when it is hovering over an application window, or the desktop wallpaper. It also changes size when I move it over a window title.

[Andrew Balsa (andrebalsa)]

Solved by editing /etc/environment, added the following line:
XCURSOR_SIZE=36

Now the cursor is the size I want, also in sddm, on the desktop, while hovering over window decorations or inside any app window.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.