emacs-29 0ab2823f518: ; Describe in PROBLEMS 2 problems with keyboard input

[Eli Zaretskii]

branch: emacs-29
commit 0ab2823f5188e41e932450c07b29f723102c3e8d
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    ; Describe in PROBLEMS 2 problems with keyboard input
    
    * etc/PROBLEMS: Describe problems with WSL and PGTK keyboard
    input.  (Bug#65802)  (Bug#65811)
---
 etc/PROBLEMS | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index aa196d7dae5..f0efbd6e411 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -441,6 +441,17 @@ environment.
 
 ** Keyboard problems
 
+*** PGTK build of Emacs running on Wayland doesn't recognize Hyper modifier
+
+If you arrange for the Wayland compositor to send the Hyper key
+modifier (e.g., via XKB customizations), the Hyper modifier will still
+not be reported to Emacs.
+
+The reason is that GDK 3.x doesn't recognize the Hyper key modifier.
+Since GDK 3.x is no longer developed, this bug in GDK will probably
+never be solved.  And the Emacs PGTK build cannot yet support GTK4,
+where this problem is reportedly solved.
+
 *** Unable to enter the M-| key on some German keyboards.
 Some users have reported that M-| suffers from "keyboard ghosting".
 This can't be fixed by Emacs, as the keypress never gets passed to it
@@ -523,6 +534,15 @@ is to downgrade to a version of GnuPG older than 2.4.1 
(or, in the
 future, upgrade to a newer version which solves the problem, when such
 a fixed version becomes available).
 
+*** Emacs running on WSL receives stray characters as input.
+
+For example, you could see Emacs inserting 'z' characters even though
+nothing is typed on the keyboard, and even if you unplug the keyboard.
+
+The reason is a bug in the WSL X server's handling of key-press and
+key-repeat events.  A workaround is to use the Cygwin or native
+MS-Windows build of Emacs instead.
+
 ** Problems with hostname resolution
 
 *** Emacs does not know your host's fully-qualified domain name.