Description of problem: Multiple users of the Lenovo Legion 5 (2020) laptop (15arh05h) have noticed brightness controls being completely broken for the built-in display. The laptop supports hybrid and discrete graphics mode, and in either case, moving the brightness slider with designated keys or in software to not cause the built-in display to dim/brighten. Attempted Fixes: Adding "acpi_osi=linux acpi_backlight=vendor" to the GRUB kernel parameters - Brightness control doesn't change with or without these. Version-Release number of selected component (if applicable): Fedora 37 (Workstation) GNOME 43.2 Wayland windowing system How reproducible: Works 100% of the time for mine and another Legion 5 user's machines. Steps to Reproduce: 1. Run/install Fedora 37 on a Lenovo Legion 5 (2020) laptop 2. Install proprietary NVIDIA drivers and reboot 3. Attempt to use gnome software brightness controls or brightness keys Actual results: Display backlight is locked to maximum brightness. Expected results: Built-in display should change illumination level in accordance with the brightness slider when it is moved. Additional info:
I can confirm this. I also own a Lenovo Legion5 Pro laptop and brightness control doesn't work for me as well.I use the KDE spin, btw. I tried both in X11 and in Wayland, this doesn't make a difference: the notification slider in the center of the screen moves from 0 to 100% when using the mouse-wheel over the battery symbol in the panel, or by using the function keys on the built in keyboard, but brightness does not change. I have just tried KDE Neon in a live version on a USB drive and there it works, also when using openSUSE I have no problems with that. It is just in Fedora that things work differently. Version-Release number of selected component (if applicable): Fedora 38 (KDE spin) KDE Plasma 5.27.6 Kernel 6.3.11-200.fc38.x86_64 Wayland and X11 windowing system How reproducible: Works 100% of the time for my Legion 5 user's machines. Steps to Reproduce: 1. Run/install Fedora 38 on a Lenovo Legion 5 (2023) laptop 2. Install proprietary NVIDIA drivers and reboot 2a Using the AMD GPU gives the same result 3. Attempt to use KDE software brightness controls or brightness keys Actual results: Display backlight is locked to maximum brightness. Expected results: Built-in display should change illumination level in accordance with the brightness slider when it is moved.
This isn't really something the wayland protocol handles, so moving this to gnome-settings-daemon for now as a next good candidate. For KDE users, they might want to file a bug for the appropriate KDE component. In any case, would you mind trying to see if this still reproduces on Fedora 38? And the Fedora 39 Beta? If it doesn't work on the Fedora 39 beta, one thing that would be good to check is whether the new "Keyboard backlight" quick toggle does actually change the value or not. If that also doesn't do the track, it would be good to get some logs when this is happening
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Hi, I am now on Fedora 39 KDE and, just as on Fedora 38 KDE, it works. After installation of the OS it doesn't work, but after some reboots it suddenly works and I can't say why. It just works. Now when I move my mouse over the battery symbol and I use my scroll wheel the brightness can be controlled very well.
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The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days