Possible workaround: add acpi_backlight=vendor to the kernel params (GRUB_CMDLINE_LINUX_DEFAULT in /etc/grub/default then sudo update-grub). Then the xorg driver also picks the intel_backlight.
Chris
Possible workaround: add acpi_backlight= vendor to the kernel params (GRUB_CMDLINE_ LINUX_DEFAULT in /etc/grub/default then sudo update-grub). Then the xorg driver also picks the intel_backlight.
Chris