CANNOT WRITE ON APP DESIGNER 2023a

When I click the window of the app designer or the app that I'm creating, I can not use the keyboard on that windows. Meanwhile when I arive to those windows using shortcut (as alt+tab) I'm able to use the keyboard. On the window of Matlab I dont have that problem. So, if I'm using the app and want to click a buttom and later I have to write I have to change the window to can use all the app. It's very frustrating.

I'm using MATLAB R2023a on Ubuntu 22.

[Rafael]

I'm using Ubuntu 24.04 and Matlab R2023b and I partially fixed it by moving the window to another workspace. It still stop working when clicking out of the box, but it's the only way I found to fix it in this Matlab version.

Answer 1

[Anurag]

Hi Francisco,

I understand that you’re facing issues while focussing on app designer window when operating Ubuntu 22.

The following steps may help you address your issue of being unable to focus on the window with your mouse click in Ubuntu:

• Ensure that MATLAB is using a compatible Java version. App Designer relies on Java, and compatibility issues with Java versions might lead to unexpected behaviour.
• Check MATLAB preferences for "Enable Keyboard Navigation." Ensure that it is checked.
• Ensure that your graphics driver is up-to-date. Outdated or incompatible graphics drivers can cause issues with UI interactions.

Hope this helps!

Answer 2

[DGM]

This is a known bug.

https://www.mathworks.com/support/bugreports/1797911

Here is a list of threads describing problems associated with the bug.

https://www.mathworks.com/matlabcentral/answers/417183-keyboard-input-is-not-working-in-matlab-guis-on-ubuntu-18-04#answer_1346797