Bug#1120275: HDR maximum brightness went down after upgrade, only restored by turning HDR off and back on

[Josh Triplett]

Package: gnome-settings-daemon
Version: 49.1-2
Severity: normal
X-Debbugs-Cc: josh at joshtriplett.org

(I'm not sure if this bug is in gnome-settings-daemon or some other part
of GNOME.)

After upgrading to latest unstable, the maximum brightness of my display
was very dim; turning it up all the way resulted in a total brightness
somewhere around 30-50% of what it was before.

I was only able to fix this by turning HDR off in the Display settings,
then turning the brightness up, then turning HDR back on, then turning
the brightness up.


-- System Information:
Debian Release: forky/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: arm64

Kernel: Linux 6.17.6+deb14-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnome-settings-daemon depends on:
ii  gnome-settings-daemon-common  49.1-2
ii  gsettings-desktop-schemas     49.1-1
ii  libasound2t64                 1.2.14-2
ii  libc6                         2.41-12
ii  libcanberra0                  0.30-18
ii  libcolord2                    1.4.8-2
ii  libcups2t64                   2.4.14-1
ii  libfontconfig1                2.15.0-2.4
ii  libgck-2-2                    4.4.0.1-7
ii  libgcr-4-4                    4.4.0.1-7
ii  libgeoclue-2-0                2.7.2-2
ii  libgeocode-glib-2-0           3.26.4-2
ii  libglib2.0-0t64               2.86.1-2
ii  libgnome-desktop-4-2t64       44.4-1
ii  libgudev-1.0-0                238-7
ii  libgweather-4-0t64            4.4.4-3
ii  libmm-glib0                   1.24.2-1
ii  libnm0                        1.54.1-1
ii  libnotify4                    0.8.6-2
ii  libp11-kit0                   0.25.9-2
ii  libpam-systemd [logind]       258.1-2
ii  libpolkit-gobject-1-0         126-2
ii  libpulse-mainloop-glib0       17.0+dfsg1-2+b1
ii  libpulse0                     17.0+dfsg1-2+b1
ii  libspa-0.2-bluetooth          1.4.9-1
ii  libsystemd0                   258.1-2
ii  libupower-glib3               1.90.10-1
ii  libx11-6                      2:1.8.12-1
ii  libxfixes3                    1:6.0.0-2+b4
ii  pipewire-audio                1.4.9-1

Versions of packages gnome-settings-daemon recommends:
pn  iio-sensor-proxy   <none>
ii  pipewire-audio     1.4.9-1
ii  pkexec             126-2
pn  systemd-oomd       <none>
ii  x11-xserver-utils  7.7+11

Versions of packages gnome-settings-daemon suggests:
pn  usbguard  <none>

-- no debconf information