Ubuntu
linux package

  1. Bug #847001
  2. Comment #41

Comment 41 for bug 847001

Revision history for this message
sillyxone (sillyxone) wrote :

Dell E7440, same problem on 14.04: very quick to change brightness using intel_backlight command, but hardward keys (Fn-Up/Down) pause the computer briefly.

Thanks to instruction from user Toz (http://ubuntuforums.org/showthread.php?t=2208278), the fix requires both "acpi_backlight=vendor" kernel param and creating the /usr/share/X11/xorg.conf.d/20-intel.conf file:
-------------------
Section "Device"
        Identifier "card0"
        Driver "intel"
        Option "Backlight" "intel_backlight"
        BusID "PCI:0:2:0"
EndSection
-------------------