Ubuntu
alsa-driver package

  1. Bug #568611
  2. Comment #87

Comment 87 for bug 568611

Revision history for this message
stocchero (guga) wrote :

Working on my Lenovo Ideapad U350.

lspci
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

Needed both boot parameters,

acpi_backlight=vendor && thinkpad_acpi.brightness_enable=0

added to /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor thinkpad_acpi.brightness_enable=0"
GRUB_CMDLINE_LINUX="acpi_backlight=vendor thinkpad_acpi.brightness_enable=0"

after that, sudo update-grub.

The gnome applet for the panel is not working, but the keys work perfectly.

Thank you very much, Kamal.