Buggy brightness control on Tumbleweed Gnome

English Hardware
1

My screen brightness slider has some weird behavior. From minimum brighness up to almost maximum, it works normally, but at the very end of the slider the brightness resets to minimum. It’s similar to this issue on KDE:

https://forums.opensuse.org/t/buggy-brightness-adjustment/151449

But I can’t find a solution in that thread.

I’m running Gnome/Wayland on Tumbleweed on a Framework 16 with a Ryzen 7 7840HS and integrated graphics. As from that thread, here’s the output of journalctl -b | grep backlight:

Aug 26 14:31:52 localhost systemd[1]: Created slice Slice /system/systemd-backlight.
Aug 26 14:31:53 localhost systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:amdgpu_bl1...
Aug 26 14:31:53 localhost systemd[1]: Starting Load/Save Screen Backlight Brightness of leds:framework_laptop::kbd_backlight...
Aug 26 14:31:53 localhost kernel: leds framework_laptop::kbd_backlight: Setting an LED's brightness failed (-5)
Aug 26 14:31:53 localhost systemd[1]: Finished Load/Save Screen Backlight Brightness of leds:framework_laptop::kbd_backlight.
Aug 26 14:31:53 localhost systemd[1]: Finished Load/Save Screen Backlight Brightness of backlight:amdgpu_bl1.
Aug 26 14:32:15 localhost.localdomain gnome-shell[1362]: Setting backlight on eDP-1 (MetaBacklightSysfs) failed: GDBus.Error:org.freedesktop.login1.NotYourDevice: Session is not in foreground, refusing.
Aug 26 14:48:46 localhost.localdomain gnome-shell[18375]: Setting backlight on eDP-1 (MetaBacklightSysfs) failed: GDBus.Error:org.freedesktop.login1.NotYourDevice: Session is not in foreground, refusing.

Something’s going on there, but I don’t know enough to understand what.

2

I presume you are using kernel 7.1.8 (more information on your current system would be helpful). It’s a known issue for AMD’s (https://gitlab.freedesktop.org/drm/amd/-/work_items/5562). It should be solved with kernel 7.2 , which is part of the next TW snapshot 20260825.

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3

7.1.8, that’s right. I’ll wait on that kernel update and report back. Thanks for your response!

Let me know what other system info would be helpful and I’ll get right on it.

4

The 20260825 snapshot is on it’s way to the mirrors as we speak

5 
knurpht@Lenovo-P16:~> fastfetch 
          ,...,                                 knurpht@Lenovo-P16
     .,:lloooooc;.                              ------------------
   ,ool'     oo,;oo:                            OS: openSUSE Tumbleweed x86_64
 .lo'        oo.   oo:                          Host: 21K9CTO1WW (ThinkPad P16s Gen 2)
.oo.         oo.    oo:                         Kernel: Linux 7.2.0-1-default
:ol          oo.    'oo                         Uptime: 1 min
:oo         .oo.    .oo.                        Packages: 62 (flatpak-user), 4859 (rpm)
.oooooooooooooo.    .oo.                        Shell: bash 5.3.15
 ;oo.               .oo.                        Display (LEN41B7): 1920x1200 in 16", 60 Hz [Built-in]
  'oo,              .oo.                        DE: KDE Plasma 6.7.4
    "ooc,',,,,,,,,,,:ooc,,,,,,,,,,,             WM: KWin (Wayland)
       ':cooooooooooooooooooooooooool;.         WM Theme: Breeze
                    .oo.             .oo;       Theme: Breeze (openSUSEdark) [Qt], NsCDE [GTK2], Breeze-Knurpht [GTK3/4]
                    .oo.               .oo.     Icons: breeze-dark [Qt], NsCDE [GTK2], breeze-dark [GTK3/4]
                    .oo.    'oooooooooo:ooo.    Font: Noto Sans (10pt) [Qt], DejaVu Sans Book (11pt) [GTK2], Noto Sans (10pt) [GTK3/4]
                    .oo.    'oo.         col    Cursor: breeze (24px)
                    .oo'    'oo          col    Terminal: yakuake 26.8.0
                     coo    'oo          oo'    Terminal Font: Source Code Pro Medium (16pt)
                      coc   'oo        .lo,     CPU: AMD Ryzen 7 PRO 7840U (16) @ 5.13 GHz
                       `oo, 'oo      .:oo       GPU: AMD Radeon 780M Graphics [Integrated]
                         'ooooc,, ,:lol         Memory: 15.80 GiB / 58.55 GiB (27%)
                            `''"clc"'           Swap: Disabled
                                                Disk (/): 667.06 GiB / 951.37 GiB (70%) - btrfs
                                                Local IP (enp1s0f0): 192.168.1.66/24
                                                Battery (5B10W51871): 90% [AC Connected]
                                                Locale: nl_NL.UTF-8
knurpht@Lenovo-P16:~>
6

Kernel updated, bug fixed. Thanks y’all!

1 Like
7

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