[Galaxy Tab S Original Android Development] :
Thanx for your useful posting.

The permissons you mention seem starnge to me:

/ #ls -la /system/etc/permissions/
drwxr-xr-x 2 root root 4096 Nov 6 12:54 .
drwxr-xr-x 14 root root 4096 Nov 6 12:54 ..
-rw-r--r-- 1 root root 830 Aug 1 2008 android.hardware.bluetooth_le.xml
-rw-r--r-- 1 root root 1052 Aug 1 2008 android.hardware.camera.flash-autofocus.xml
-rw-r--r-- 1 root root 877 Aug 1 2008 android.hardware.camera.front.xml
-rw-r--r-- 1 root root 880 Aug 1 2008 android.hardware.consumerir.xml
-rw-r--r-- 1 root root 942 Aug 1 2008 android.hardware.location.gps.xml
-rw-r--r-- 1 root root 824 Aug 1 2008 android.hardware.sensor.accelerometer.xml
-rw-r--r-- 1 root root 804 Aug 1 2008 android.hardware.sensor.compass.xml
-rw-r--r-- 1 root root 806 Aug 1 2008 android.hardware.sensor.gyroscope.xml
-rw-r--r-- 1 root root 816 Aug 1 2008 android.hardware.sensor.light.xml
-rw-r--r-- 1 root root 815 Aug 1 2008 android.hardware.sensor.proximity.xml
-rw-r--r-- 1 root root 1076 Aug 1 2008 android.hardware.touchscreen.multitouch.distinct.xml
-rw-r--r-- 1 root root 975 Aug 1 2008 android.hardware.usb.accessory.xml
-rw-r--r-- 1 root root 868 Aug 1 2008 android.hardware.usb.host.xml
-rw-r--r-- 1 root root 843 Aug 1 2008 android.hardware.wifi.direct.xml
-rw-r--r-- 1 root root 829 Aug 1 2008 android.hardware.wifi.xml
-rw-r--r-- 1 root root 1050 Aug 1 2008 android.software.live_wallpaper.xml
-rw-r--r-- 1 root root 880 Aug 1 2008 android.software.sip.voip.xml
-rw-r--r-- 1 root root 828 Aug 1 2008 com.android.location.provider.xml
-rw-r--r-- 1 root root 828 Aug 1 2008 com.android.media.remotedisplay.xml
-rw-r--r-- 1 root root 793 Aug 1 2008 com.cyanogenmod.android.xml
-rw-r--r-- 1 root root 5110 Aug 1 2008 com.cyngn.screencast.xml
-rw-r--r-- 1 root root 7190 Aug 1 2008 com.cyngn.updater.xml
-rw-r--r-- 1 root root 810 Aug 1 2008 com.google.android.ble.xml
-rw-r--r-- 1 root root 818 Aug 1 2008 com.google.android.camera2.xml
-rw-r--r-- 1 root root 816 Aug 1 2008 com.google.android.maps.xml
-rw-r--r-- 1 root root 835 Aug 1 2008 com.google.android.media.effects.xml
-rw-r--r-- 1 root root 261 Aug 1 2008 com.google.widevine.software.drm.xml
-rw-r--r-- 1 root root 15603 Aug 1 2008 com.nextbit.android.xml
-rw-r--r-- 1 root root 748 Aug 1 2008 com.tmobile.software.themes.xml
-rw-r--r-- 1 root root 1094 Aug 1 2008 features.xml
-rw-r--r-- 1 root root 183 Aug 1 2008 org.cyanogenmod.hardware.xml
-rw-r--r-- 1 root root 1156 Aug 1 2008 org.cyanogenmod.theme.xml
-rw-r--r-- 1 root root 5881 Aug 1 2008 platform.xml
-rw-r--r-- 1 root root 1805 Aug 1 2008 qti_permissions.xml
-rw-r--r-- 1 root root 3037 Aug 1 2008 tablet_core_hardware.xml

So here it is 0644. Perhaps you have accidently unindented fired a chmod -R?

The entry you are requesting seems useful on a first glance. I would like to try to build a custom permissions file (i.e. custom.xml) which can be copied to /system/etc/permissions if apps make problems, cause I have no problems - using esexplorer - and want to keep permisson chanhes as minimal as possible. I will setup such a file and we can test that.

Minimum brightness is 3 (from 255) at the moment, I will set it to 1 on the next build - shoild not harm the usecase of anybody, cause you mustn't pull the slider completly to the left. You are talking about manual brightness, aren't you?

[MENTION=535343]all[/MENTION]: I plan next build for Sunday. Have to slow down and get a rest to keep my mind open.