6

I know This has been asked to death. I have dealt with it before on other laptops.

And I have tried al these combinations in /et/default/grub and run a sudo update-grub reboot, test, fail.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX="acpi_osi=Linux"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet video.use_native_backlight=1"
GRUB_CMDLINE_LINUX=""

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi=strict"
GRUB_CMDLINE_LINUX=""

I tried creating a /usr/share/X11/xorg.conf.d/20-intel.conf source.

So what's next?

It's a HP Pavilion 15-cx0670nd.

  • Intel Core i7-8750H
  • GeForce GTX 1050 Ti
  • Intel Mobile HM370
janw
  • 556

1 Answers1

0

I own the same model laptop and also experience this issue. Nothing seemed to work ..

Today I installed Ubuntu 19.04 to a USB stick and the function keys for the brightness worked out of the box! However, when I upgraded my Ubuntu 18.04 to 19.04 it did not work, neither did installing a 'clean' 19.04 over my upgraded version.

Since my clean USB installation of 19.04 did work you might want to give that a shot.

Edit: Seems to be working on my upgraded version as well now.

TotalKnob
  • 1