Bug#933174: wayland: Brightness bar not displayed when adjusting screen brightness

["Conrad J.C. Hughes (for Debian package stuff)" <debbugs@xrad.org>]

Source: wayland
Severity: normal

Dear Maintainer,

When I operate my laptop's screen brightness buttons, an overlay appears,
usually with a bar showing the current level.  Since upgrading to
buster+wayland, the overlay appears, but the bar doesn't: it's always blank.

Just noticed that this is *not* the case prior to login; I assume that the gdm
greeter doesn't use wayland?

Best regards,
Conrad



-- System Information:
Debian Release: 10.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-5-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled