Blank frame after virtual desktop switching on xmonad

[psanford]

On xmonad, switching away from the virtual desktop emacs is on and then back, emacs shows a blank frame and does not redraw. The keyboard is still active (e.g. I can C-x C-c to exit emacs).

This is with nix on Ubuntu 20.04. I also have emacs-27 installed from nix on this system which does not have this issue.

[talyz]

Which package from the overlay are you using? It's quite likely an upstream bug, especially if it's one of those built from master.

[psanford]

It was for emacsGcc

[collares]

I see a related bug: when exwm starts up, the screen is blank. It is not an emacsGcc bug, and reverting emacs-mirror/emacs@483c5e9 fixes it. You can revert it by overriding the package attribute, like so:

package = pkgs.emacsGcc.overrideAttrs(old: {
  patches = old.patches ++ [
    (pkgs.fetchpatch {
      url = "https://github.com/emacs-mirror/emacs/commit/483c5e953c12a95382bef4a3b6769a680c32fe86.patch";
      sha256 = "sha256-8GEGLqiVMwhd4HSEI306eDv988UmITBy/y1rmGXAppg=";
      revert = true;
    })
  ];
});

I have filed http://debbugs.gnu.org/cgi/bugreport.cgi?bug=48268 upstream.

[psanford]

Switching to an earlier version fixed this for me. 🙇

[collares]

Update: I just tried emacs master and exwm is working fine for me there (I tried with emacsGcc but that should be independent of native compilation). So the revert won't be needed as soon as #150 is fixed.

cc @thomasheartman @mbroeders