STEPS TO REPRODUCE 1. use Plasma on a laptop 2. try to adjust the display brightness via Battery applet in the system tray 3. OBSERVED RESULT no effect when we change the "Display brightness" slider. The display brightness changes as expected if we use the special keyboard keys instead. EXPECTED RESULT we can adjust the display brightness via Battery applet SOFTWARE/OS VERSIONS Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.240.0 Qt Version: 6.5.0 Graphics Platform: Wayland
Works for me. Do you have a second screen attached? If so, it might be Bug 469895, which was just fixed recently. If not, please kill plasmashell, run it in a terminal window, reproduce the bug, and then paste the terminal output.
No external screen here. There is no output in Konsole after reproducing the bug.
Also works for me, is this is a self-built setup installing somewhere other than /usr
All packages were installed from neon repositories. Also I noticed that the power management of the screen is not working, and "Switch off after" option is no longer available in "Energy Saving" KCM.
I have just noticed that the power management of the screen works on X11. But the display brightness adjustment is not working on X11 too.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
The requested info was provided.
Heard that this was broken for David Redondo too, who's using Neon Unstable. But it's working for me and Justin Zobel, and Justin has stuff installed from packaging rather than built from source--just in Fedora, and not Neon. It points to a Neon packaging bug; moving there.
Works for me using neon unstable build 4:5.27.5+p22.04+tunstable+git20230612.0243-0 I'm upgrading now to today's build...
Works fine with neon powerdevil 4:5.27.6+p22.04+tunstable+git20230628.0304-0
This might be due to kded6 overlapping with kded5, try apt install --reinstall kf6-kded6 and log out and in
Here is the output on my system: $ sudo apt install --reinstall kf6-kded6 [sudo] password for myuser: Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package kf6-kded6
apt install --reinstall kf6-kded
Reinstalled kf6-kded package and the bug persists after logout and login.
work fine for me here on wayland with intel_backlight. what does ` ls -ls /sys/class/backlight/ ` produce?
$ ls -ls /sys/class/backlight/ total 0 0 lrwxrwxrwx 1 root root 0 jul 10 01:09 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight
looks fine. what about - ls -ls /sys/class/backlight/intel_backlight/
$ ls -ls /sys/class/backlight/intel_backlight/ total 0 0 -r--r--r-- 1 root root 4096 jul 10 08:45 actual_brightness 0 -rw-r--r-- 1 root root 4096 jul 10 08:45 bl_power 0 -rw-r--r-- 1 root root 4096 jul 10 08:37 brightness 0 lrwxrwxrwx 1 root root 0 jul 10 08:37 device -> ../../card0-LVDS-1 0 -r--r--r-- 1 root root 4096 jul 10 08:37 max_brightness 0 drwxr-xr-x 2 root root 0 jul 10 08:45 power 0 -r--r--r-- 1 root root 4096 jul 10 08:45 scale 0 lrwxrwxrwx 1 root root 0 jul 10 08:36 subsystem -> ../../../../../../../class/backlight 0 -r--r--r-- 1 root root 4096 jul 10 08:37 type 0 -rw-r--r-- 1 root root 4096 jul 10 08:36 uevent
also looks fine. are there any error in the journal for powerdevil or kernel stuff?
journal and dmesg logs do not print anything.
(In reply to Patrick Silva from comment #4) > All packages were installed from neon repositories. Also I noticed that the > power management of the screen is not working, > and "Switch off after" option is no longer available in "Energy Saving" KCM. Currently the power management of the screen works and "Switch off after" option is available, but the bug with the applet persists.
I can confirm. The display brightness slider within the battery and brightness applet has no effect; however, adjusting the brightness level is possible by navigating to system settings-->Power Management-->Energy Saving, adjusting the Screen brightness level, and clicking Apply. Current System Software Versions: Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.240.0 Qt Version: 6.6.0 Kernel Version: 6.2.0-26-generic (64-bit) Graphics Platform: Wayland
I can't reproduce on neon unstable after today's updates.