Ubuntu
linux package

  1. Focal (20.04)
  2. Bug #1894667
  3. Comment #31

Comment 31 for bug 1894667

Revision history for this message
Alex Hung (alexhung) wrote :

Please try the kernel @ https://people.canonical.com/~alexhung/LP1894667/

1. remove kernel parameter "acpi_backlight=video"
2. download all deb
3. install kernel by "sudo dpkg -i *.deb"
4. reboot

This should be the same as "acpi_backlight=video"
1. run "ls /sys/class/backlight"
2. verify whether brightness bar works.