bug#48413: 28.0.50; emacs does not repaint the window after switching workspaces in Xmonad

[Basil L. Contovounesios]

Platon Pronko <platon7pronko@gmail.com> writes:

> This looks like Xmonad-specific regression after commit 483c5e95 by Martin 
> Rudalics.
>
> Steps to reproduce (under Xmonad):
>
> 1. Open a new frame (./src/emacs -Q);
> 2. Type something in a buffer;
> 3. Switch to a different workspace;
> 4. Switch back;
> 5. Observe buffer being blank and not responding to any interaction.

FWIW, on Xmonad 0.15 when I switch back the selected frame is not blank.
Only when there is more than one frame are the unselected frames blank.
(See screenshots in https://bugs.gnu.org/48268#20.)

Thanks,

-- 
Basil