Comment 31 for bug 1894667

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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.