mirror of
https://codeberg.org/postscriptum/gemlog.git
synced 2026-02-19 14:32:40 +00:00
31 lines
No EOL
804 B
Text
31 lines
No EOL
804 B
Text
# Screen backlight correction on iMac / Linux
|
|
|
|
Before, I have changed backlight with:
|
|
|
|
``` bash
|
|
xrandr --output eDP --brightness 0.8
|
|
```
|
|
|
|
But after switching to Debian / i3, found that screen brightness correction works not like before - even the picture less bright, it looks like back or foreground LED ones still turned on max.
|
|
|
|
After some time of researching, found new option for my hardware configuration (it was 255 by default):
|
|
|
|
``` bash
|
|
echo 50 > /sys/class/backlight/radeon_bl1/brightness
|
|
```
|
|
|
|
Now picture looks more contrast and colorful, before apply the recipe above, I had changed acpi_backlight to native in
|
|
|
|
``` /etc/default/grub
|
|
GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_backlight=native"
|
|
```
|
|
|
|
then
|
|
|
|
``` bash
|
|
update-grub
|
|
```
|
|
|
|
Some other tips:
|
|
|
|
=> https://wiki.archlinux.org/title/Backlight |