Ubuntu
linux package

  1. Bug #1173961
  2. Comment #14

Comment 14 for bug 1173961

Revision history for this message
Max Oropeza (moropeza28) wrote : Re: [Gateway NV55C] Two backlight interfaces that wont adjust backlight.

So, I was able to install the kernel version 3.11.0-999-generic. Once I rebooted, there was no difference. I changed the GRUB to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" AND
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='!Windows 2012" AND
GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=Linux acpi_backlight=vendor"

acpi_osi=Linux acpi_backlight=vendor AND quiet splash acpi_osi='!Windows 2012 made it possible to lower the brightness to about halfway but it doesn't show the dialog that says the screen brightness is lowering. But quiet splash acpi_backlight=vendor shows the dialog but doesn't lower the screen brightness. I left the GRUB with GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=Linux acpi_backlight=vendor" for the meantime.