[Bug 207473] Re: Screen brightness double level changes

[Sympy]

Well, the original post mentions that without g-p-m the brightness
transition works smoothly, so I thought a fix could also be possible
with Gnome.

My card is a GeForce 8400M GS (I have a Vostro 1400 lappy) and I have
this problem with both nv and nvidia-glx-new. Please let me know of any
technical details I can give to help.

What I find curious is that I see a lot of people solving this problem
by tweaking /etc/acpi/video_brightnessdown.sh and
/etc/acpi/video_brightnessup.sh, while for me changing those files -
even deleting them - has no effect all. It seems they're not what the
system is calling when I press the fn brightness keys.

This what lshal -m reports with a single touch to fn + up:

07:27:06.173: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
07:27:06.178: computer_logicaldev_input_1 condition ButtonPressed = brightness-up
07:27:06.178: computer_logicaldev_input condition ButtonPressed = brightness-up
07:27:06.364: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up

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Screen brightness double level changes
https://bugs.launchpad.net/bugs/207473
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