I discovered by accident today that the scroll switch on the top of the unit will adjust the screen brightness in X. It doesn’t seem to work in the console, and I’ve done nothing to tell X about it, but it works. Woohoo.

Combined with that and laptop-mode and powernowd, I think I’m going to get 3 to 3.5 hours of battery life on this thing.

6 thoughts on “Brightness

    1. have you been able to figure out why this is changing the brightness? I am running fedora on my tc1100 and would be very interested in being able to change the screen brightness :)

  1. No, I haven’t. I also haven’t been able to figure out why it sometimes works and sometimes doesn’t. Alas.

    1. Can you provide your xorg.conf? Do you remap the keycodes to something? The jog dial merely provides key events, so whatever you have it mapped to is doing the backlight magic…

  2. Try holding Fn and pressing F3 or F4 (or F5/F6?) in X. That might do it too, even though the keys aren’t marked. Remember that if you swapped Control and Fn in BIOS, you might be pressing control instead of Fn. ;-)

  3. I also work my brain out to solve the mistery.

    It seems direct connect with the kernel’s WMI support.
    If I use ‘echo 0 > /proc/acpi/wmi/WMID/bluetooth’, the joy sets the display’s bright. If I send 0, return keycodes.

    Freek, but ok for me.

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