Hi, I'm porting Android 2.2 (linux kernel 2.6.32) onto an omap with other custom hardware, and I'm having problems with Android controlling the backlight for my LCD screen. In the kernel, I have used the generic backlight driver, which creates sysfs nodes at "/sys/class/backlight/ my-bl/" and I can properly change the backlight brightness and power from those nodes (echo [0 - 255] > /sys/class/backlight/my-bl/ brightness). In order for Android to change the backlight I saw that I must create the liblights library. I've done that, and liblights points at the correct sysfs nodes. The problem is, when I go to Settings->Display->Brightness in Android, the slider does not do anything. The screen off timeout also seems to have no effect - my LCD stays on forever.
I have tried adding log prints into my liblights library but never see any of them happen. From what I gather, there is a Lights Service that calls into my liblights library. In the logcat output I see where the SystemServer is starting the Lights Service, but I get no clue in any other logs about what is happening with that service. I can see in the logcat events buffer that something is happening when I change the brightness slider. As for the screen timeout, I do have power management disabled (setprop hw.nopm true) in my init.rc file because currently it breaks things. Will the screen timeout not work without power management? Is there something I am missing? I feel like I am running in circles with this. -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
