Keyboard backlight never remains off with nvidia-bl-dkms 0.15 series on MacBook 5.1

[Chris Lasher]

In Ubuntu 9.10 Karmic Koala, using nvidia-bl-dkms 0.15 series from the Mactel PPA, the keyboard backlight on my MacBook 5.1 will never remain completely off, by attempting to dim it all the way using the F5 keyboard dim key. It will decrease until the keyboard light turns off, and then it will turn back on within two seconds. It returns to brightness setting of 100, as confirmed by
cat /sys/class/leds/smc\:\:kbd_backlight/brightness

This bug is reproducible without using the backlight keys, with
echo 0 | sudo tee -a /sys/class/leds/smc\:\:kbd_backlight/brightness

[Mihaly Toth (m-toth)]

I have the same problem if I install pommed. But I don't use it, because if I install it, then screen backlight adjustment became very very slow (another bug:) ) (Lucid, with Macbook 5.1)

[Νίκος Αλεξανδρής (nikos.alexandris)]

Not a fix but, for the time being, should be useful: set "on_threshold = 0". The ambient light sensor does not work anyway (the way it should, or does it? -- mbp5,1 here).

--- /etc/pommed.conf ---

        # ambient light thresholds for automatic backlight (0 - 255)
        on_threshold = 0

--- /etc/pommed.conf ---

[Mihaly Toth (m-toth)]

Thanks, it worked but the sceen brightness adjustment is still slow, with pommed.

[Νίκος Αλεξανδρής (nikos.alexandris)]

Sorry for that. I don't have this problem since long time ago. In fact, it works faster than in OS-X. Too fast... :-)

(
Currently working with driver 195.36.15 and mbp-nvidia-bl 0.24.3 under Lucid
)

[fl_ori4n (girard.florian)]

I have the same problem with my macbook pro 7.1

I can't stop the back-light with F55 or the command line:
echo 0 | sudo tee -a /sys/class/leds/smc\:\:kbd_backlight/brightness

but, after 60sec, if i didn't touch the keyboard, the back-light turn off.

If i can help in any case...