* Reboot with only the kernel parameter acpi_backlight=vendor :
* Make a comment on if you can now alter the backlight with hotkeys or a brightness applet.
That did not work.
* ls /sys/class/backlight > vendorbacklight
See attachments.
* If you have the folder /sys/class/backlight/intel_backlight/ :
* type sudo su , and then execute:
* ls -la /sys/class/backlight/intel_backlight/ > lslabacklight
See attachments.
* echo 8 > /sys/class/backlight/intel_backlight/brightness
Screen became almost black, and I had to reboot, as I wasn't seeing anthing .
* Reboot with only the kernel parameter acpi_backlight= vendor :
* Make a comment on if you can now alter the backlight with hotkeys or a brightness applet.
That did not work.
* ls /sys/class/ backlight > vendorbacklight
See attachments.
* If you have the folder /sys/class/ backlight/ intel_backlight / : backlight/ intel_backlight / > lslabacklight backlight/ intel_backlight /brightness
* type sudo su , and then execute:
* ls -la /sys/class/
See attachments.
* echo 8 > /sys/class/
Screen became almost black, and I had to reboot, as I wasn't seeing anthing .