Bug#1010160: x11-xkb-utils: setxkbmap -layout cz_qwerty loads layout which fails with a particular dead-key combination

[Pavel Sanda <sanda@lyx.org>]

Package: x11-xkb-utils
Version: 7.7+5
Severity: normal
X-Debbugs-Cc: sanda@lyx.org

Dear Maintainer,

for keyboard configuration I use the following command on my system:
setxkbmap -model pc105 -layout "us,cz_qwerty"  -option "grp:alt_shift_toggle"

The cz_qwerty layout works mostly fine, except one singular failure:
dead-key ˇ (caron) + u (the same for upper-case variant ˇ+U).

I am afraid non-native prepared/"fixed" this layout, because the layout
logically ends up with caron+u, which is non-existent in czech while
on all czech keyboards you end up with overring+u (ů, see
https://en.wikipedia.org/wiki/Ring_(diacritic) ).

It renders this layout unusable for continuous czech writing, can it get fixed?
(Or at leat can you give me a hint where to fix this, I expect this could
be two-liner change in some kayboard-layout files...)


-- System Information:
Debian Release: 11.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-13-amd64 (SMP w/8 CPU threads)
Locale: LANG=C, LC_CTYPE=cs_CZ (charmap=ISO-8859-2), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages x11-xkb-utils depends on:
ii  libc6        2.31-13+deb11u3
ii  libx11-6     2:1.7.2-1
ii  libxaw7      2:1.0.13-1.1
ii  libxkbfile1  1:1.1.0-1
ii  libxt6       1:1.2.0-1

x11-xkb-utils recommends no packages.

x11-xkb-utils suggests no packages.

-- no debconf information