ISO: Setting screen brightness does not work on Acer TravelMate B 117 (Braswell)
sysctl hw.acpi.video.lcd0.brightness just gets ignored.
% kldstat | grep acpi
35 1 0xffffffff841f2000 20f0 acpi_wmi.ko
36 1 0xffffffff841f5000 2b88 acpi_video.ko
xbacklight does not do anything either.
% sudo intel_backlight
Current backlight value: -2147483648% (0/0)
Is also not working.
How to set brightness here?
About this issue
- Original URL
- State: closed
- Created 3 years ago
- Comments: 16 (14 by maintainers)
Commits related to this issue
- Remove intel-backlight [ci skip] Use backlight(8) instead, thanks @evadot https://github.com/helloSystem/ISO/issues/97#issuecomment-977664796 — committed to helloSystem/ISO by probonopd 3 years ago
- Remove intel-backlight [ci skip] Use backlight(8) instead, thanks @evadot https://github.com/helloSystem/ISO/issues/97#issuecomment-977664796 — committed to helloSystem/ISO by probonopd 3 years ago
- Remove intel-backlight [ci skip] Use backlight(8) instead, thanks @evadot https://github.com/helloSystem/ISO/issues/97#issuecomment-977664796 — committed to helloSystem/ISO by probonopd 3 years ago
A lot of newer backlight won’t work without drm modules loaded. In my testing acpi_video won’t work too on those laptops. intel_backlight is a piece of garbage that should never have existed. The correct way to deal with those backlight is to use drm-kmod and backlight(8) on FreeBSD >= 13.