I have an Omen by HP 15-dc0015np. This device have the same insue but only have a nvidia card, so doens't support to use intel video card to fix temporaly backlight. The solution above doens't work on me and use acpi_osi= or acpi_backlight=vendor or acpi_backlight=video or acpi_osi=! acpi_osi='Windows 2015' or acpi=off. Regards.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1775065 Title: No brightness controls and /sys/class/backlight empty after upgrade to Bionic on laptop with GeForce GTX 1060 Mobile (kernel parameter acpi_osi= is a workaround) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1775065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
