Searching around (both here and on other forums) I've come to realize this is a somewhat common issue. Alas, there doesn't seem to be a specific solution (or even narrowed done set of solutions).
I'm using Debian 12 KDE on a Lenovo mini laptop. Attempting to change the monitor brightness either with the corresponding keys or using the brightness slider (or even from terminal) shows a numerical change (i.e. I see the applet indicating the brightness level changing), however this does not correspond to an actual change in monitor brightness, which seems to be at about 50%.
For testing, I booted a live USB Fedore KDE. There,
I've already tried kernel boot parameters like
This is probably a simplistic way of putting it, but how do I use
I'm using Debian 12 KDE on a Lenovo mini laptop. Attempting to change the monitor brightness either with the corresponding keys or using the brightness slider (or even from terminal) shows a numerical change (i.e. I see the applet indicating the brightness level changing), however this does not correspond to an actual change in monitor brightness, which seems to be at about 50%.
/sys/class/backlight has one entry, acpi_video0. Any changes of brightness control (i.e. moving the slider or using the buttons) correspond to the numerical values changing (that is, e.g. acpi_video0/brightness changes, containing the new value). However, as I said, this doesn't reflect in actual brightness difference.For testing, I booted a live USB Fedore KDE. There,
/sys/class/backlight contains a different entry, intel_backlight, and controls/slider work: The actual monitor brightness changes.I've already tried kernel boot parameters like
acpi_backlight=native (as well as vendor, video, and none), to no avail. This is probably a simplistic way of putting it, but how do I use
intel_backlight on Debian, since this seems to be working on Fedora?Statistics: Posted by JohnWasRight — 2024-08-31 08:57 — Replies 2 — Views 88