Bug#959071: xserver-xephyr: Xephyr and Xnest: AltGr combined keystrokes do not work while using German keyboard layout

[Adrian Immanuel Kiess <adrian@mx.aik.onl>]

Package: xserver-xephyr
Version: 2:1.20.8-2
Severity: normal

Dear Maintainer,

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
     Xephyr :2 -query m2n.lan.dac -screen 1920x1080 &
     or
     Xnest -query tdz2000.lan.dac -geometry 1600x1050 :2
   * What was the outcome of this action?
     Everything works fine, exept AltGr combined keystrokes like "\" key on a
German keyboard
   * What outcome did you expect instead?
     Working AltGr (right Alt key) key on a German keyboard

currently in Debian/testing Xnest and Xephyr report the following error, when
used with a German keyboard layout:

adrian@g6 ~ % Xephyr :2 -query m2n.lan.dac -screen 1920x1080 &
[1] 74607
adrian@g6 ~ % The XKEYBOARD keymap compiler (xkbcomp) reports:
> Internal error:   Could not resolve keysym XF86FullScreen
Errors from xkbcomp are not fatal to the X server

In the effect, hitting AltGr + ß does produce no key instead of "\". Any AltGr
combined keystroke is broken and does not work.

I hit this error connecting to an XDM display manager running on NetBSD 9
connected over a local lan network. I tried with two real NetBSD 9 machines on
the local network. AltGr works fine on those NetBSD 9 machines locally with
console login and Xorg login or on my Debian/testing host here with
Enlightenment DR 17.

Please can you have a look at this issue.

Thank you very much.

Sincerely,

Adrian Kiess



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.5.0-2-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_CRAP
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages xserver-xephyr depends on:
ii  libaudit1            1:2.8.5-3+b1
ii  libbsd0              0.10.0-1
ii  libc6                2.30-4
ii  libepoxy0            1.5.4-1
ii  libgcrypt20          1.8.5-5
ii  libgl1               1.3.1-1
ii  libpixman-1-0        0.36.0-1
ii  libselinux1          3.0-1+b3
ii  libsystemd0          245.5-1
ii  libudev1             245.5-1
ii  libunwind8           1.2.1-9
ii  libx11-6             2:1.6.9-2
ii  libx11-xcb1          2:1.6.9-2
ii  libxau6              1:1.0.8-1+b2
ii  libxcb-icccm4        0.4.1-1.1
ii  libxcb-image0        0.4.0-1+b2
ii  libxcb-keysyms1      0.4.0-1+b2
ii  libxcb-randr0        1.14-2
ii  libxcb-render-util0  0.3.9-1+b1
ii  libxcb-render0       1.14-2
ii  libxcb-shape0        1.14-2
ii  libxcb-shm0          1.14-2
ii  libxcb-util0         0.3.8-3+b2
ii  libxcb-xkb1          1.14-2
ii  libxcb-xv0           1.14-2
ii  libxcb1              1.14-2
ii  libxdmcp6            1:1.1.2-3
ii  libxfont2            1:2.0.3-1
ii  libxshmfence1        1.3-1
ii  xserver-common       2:1.20.8-2

Versions of packages xserver-xephyr recommends:
ii  libgl1-mesa-dri  19.3.3-1

xserver-xephyr suggests no packages.

-- no debconf information