Bugzilla – Bug 5269
Easily running out of keycodes when dynamically allocating Xvnc keysyms
Last modified: 2018-05-02 12:57:41
You need to
before you can comment on or make changes to this bug.
When an "unknown" keysym is recieved by Xvnc, it will dynamically allocate one
from the "xmodmap table". Unfortunately there's only room for 255 keycodes. Our
default table nowadays includes many multimedia keys etc, so there's only 29
free positions. If the client uses more keysyms than this (consider cyrillic
clients for example), we will run out of free positions. The effect is that no
(new) symbols can be entered.
I guess it's difficult to find a real solution for this, but we could perhaps
tweak the allocation somewhat, for example consider removing rarely used
keysyms to make room for new ones.
An administrator can mitigate this problem by configuring the default keyboard
layout to the layout users are actually using (we have "us" layout by default).
A user can also work around the issue by manually setting the keyboard layout
inside the session (using setxkbmap or some GUI).