Working fine on my HP Pavilion DV3 2155mx.
I needed to add the "acpi_backlight=vendor" boot parameter.
As reported in comment #87, the gnome brightness panel does not work but the function keys work perfectly.
Thanks, Kamal! You've fixed an issue that I've had since I first tried Ubuntu on this laptop (9.04).
Working fine on my HP Pavilion DV3 2155mx.
I needed to add the "acpi_backlight =vendor" boot parameter.
As reported in comment #87, the gnome brightness panel does not work but the function keys work perfectly.
Thanks, Kamal! You've fixed an issue that I've had since I first tried Ubuntu on this laptop (9.04).