Hi all,

I am new into the N810 world. I would like to have full control over the N810 backlight using an script or even a binary. I tried first this script (http://fanoush.wz.cz/maemo/blset), but it does not work at all.

I run it as root (via ssh) but nothing happens. The only way I found to modify the backlight is like this:

echo x > /sys/devices/platform/omapfb/panel/backlight_level

Being x a number between 0 and 127. It works...but just for few seconds. After 2 or 3 seconds the backlight goes back to it original value (the value set through the brightness control in the status bar).

I also disabled the light sensor so it is not playing with the backlight anymore.

Anyone has any idea of how to get full backlight control ??

Any help will be very wellcome!

Hi, its me again.

I did some more research. Using strace I figured out that the dsme deamon is writing every few seconds the backlight value to

/sys/devices/platform/omapfb/panel/backlight_level

This deamon cannot be stopped (the N810 would reboot).
Does anyone how to tell dsme to write the value I want or how does dsme figure out the value that it has to write ??

Any help will be very welcome again,

See here for some direction: https://garage.maemo.org/projects/adv-backlight/

Just so you know, the blset script works with fanoush's modified kernel.

He seems to have a newer deb here:
http://cs.trinity.edu/~acm/debs/adva....7-1_armel.deb

But its true, I use that script fine on a N800 with OS2008 & fanoush's kernel fine.

yes, blset works (in OS2006-8) but you need modified kernel. For N8x0 running OS2008 check the adv-backlight project. Or (in OS2008) you can also run directly
such level x writes to
/sys/devices/platform/omapfb/panel/backlight_level something similar to (x-1)/2 so 3 becomes 1 and 255 becomes 127

The 0.7 release is a little raw compared to 0.6. But, yeah, it does add a volume slider.

also if you want to disable N810 brightness sensor you can remove filter-brightness-als module in /etc/mce/mce.ini

A point to note: dsmetest -l <1-2> do in fact work (as opposed to erroring) but will turn off the backlight completely! It can be hard to get it back on without rebooting, unless you have a network connection or BT keyboard and steady fingers. (Just realized we're in the N810 forum, so I guess you have a hardware keyboard. Type steady!)

yes because (x-1)/2 for x=1,2 is 0
with N810 (unlike N800) the display is readable even with brightness 0

Cooool !!! It's work for me! advanced-backlight_0.7-1_armel.deb is superb deb for N800 (OS2008). Strongly recommended, friends!