bug#39072: 26.3; Pressing C-z in fullscreen messes all frames

[Eli Zaretskii]

> From: Corwin Brust <corwin@bru.st>
> Date: Fri, 10 Jan 2020 11:01:54 -0600
> 
> # windows 10, GNU Emacs 26.3 (msi)
> emacs -Q
> F-11 ;;now we're full-screen
> C-z  ;; now all frames are "locked"
> 
> ...
> 
> At this point, emacs won't accept keyboard input. C-g doesn't do anything, 
> If there are several frames they will all be in this state.  We seem to be 
> able to 
> recover using the mouse to execute an interactive command.  In fact, I was 
> able to use Help | Send Bug Report to create this message *after* reproducing
> from my -Q session -- once the mini-buffer prompt popped I was able to type
> again.

I cannot reproduce this, but I'm not on Windows 10.  On my Windows
system, C-z minimizes the frame, even if it was previously maximized
with F11.