[Kernel-packages] [Bug 1775065] Re: 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)

Forgot my setup infos: ## lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.1 LTS Release: 18.04 Codename: bionic dmidecode: System Information Manufacturer: HP Product Name: HP ZBook 15 G5 uname -a: 4.15.0-39-generic #42-Ubuntu SMP

[Kernel-packages] [Bug 1775065] Re: 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)

Got a similar problem on a HP Zbook G5. I have 2 graphics cards: Intel + Nvidia. I use the Nvidia proprietary drivers 415. The difference in my case is that I have an entry in "/sys/class/backlight", namely: "intel_backlight" and that I can control the display brightness using the gnome GUI slide