Brightness control not working after Fedora 42 update on TOSHIBA Satellite C850-B561

Ask Fedora
,
1

After updating to Fedora 42 (on GNOME 48), brightness control via the Quick settings & GNOME Displays Settings stopped working.

Hardware:

  • Laptop: TOSHIBA Satellite C850-B561
  • CPU: Intel® Core™ i3-2328M × 4
  • GPU: Intel® HD Graphics 3000

Steps to Reproduce:

  1. Update to Fedora 42.
  2. Attempt to control brightness using xbacklight or GNOME’s built-in power settings.

Solution:

  1. Install brightnessctl:

sudo dnf install brightnessctl

  1. Use brightnessctl to adjust brightness:

Increase brightness:
brightnessctl set 100%
Decrease brightness:
brightnessctl set 50%

:warning: Warning:
Do not set to brightnessctl set 0% or you will get a blank screen in it can be a little hard to reverse.

Fixed: with gnome-settings-daemon 48.1 update.

2

Hi, please report a bug. You can start with gnome-control-center and see if they can figure out what’s wrong. Link it here, please.

We can publish this as a common issue if we can find a larger range of affected users or hardware.

1 Like
3

Just a thought. If the Xorg support was dropped on Fedora 42, it could cause xbacklight to lose control over the matter, while brightnessctl still works.

The change was reverted so the functionality might come back with an update.

1 Like
4
1 Like
6

According to @yassin , this is fixed in gnome-settings-daemon-48.1-1.fc42. Great, moving from Common Issues > Proposed Common Issues to Ask Fedora.

1 Like