Comment 24 for bug 998310

See https://forum.xfce.org/viewtopic.php?id=13926
and upstream issue https://gitlab.xfce.org/xfce/xfce4-settings/-/issues/168

There is a partial fix which apparently fixes the desktop shortcuts being locked, but not the multiple calls to xmodmap: https://gitlab.xfce.org/atomsymbol/libxfce4ui/-/commit/85d8d390f9f2265613da4291992523937a7a2519

  XFCE desktop shortcuts are unusable for about 30-40 seconds
  after switching from tty to Xorg if there exists a .Xmodmap
  file in $HOME. Without a .Xmodmap file, the delay is about 10
  seconds. Similar behavior gets triggered when a keyboard is
  reconnected to an USB port. With this patch, desktop shortcuts
  are usable immediately (likely in less than 0.25 seconds after
  switching from tty to Xorg).

  An issue not fixed by this patch is that /usr/bin/xmodmap
  can be executed about 30 times after switching to Xorg.
  However, on the tested machine with a relatively small .Xmodmap
  this does not pose a performance issue which would be noticeable
  by the user.