[Samsung Gear 2] gled:
Actually it does not seem to run as root, I'm using this image: http://www.mediafire.com/download/smfm8xh6yc568ac/Wear_511__07_30_2015_Root_KernelSettings.tar and have to su in adb shell to access /data and do something there.

I/ActivityManager( 1654): Displayed com.biktor.gear2ksettings/.MainActivity: +100ms
D/SmartWatchFaceService( 1811): onPropertiesChanged()
D/TaskPersister( 1654): removeObsoleteFile: deleting file=11_task.xml
I/Sensors ( 1654): TiltSensor: report data
W/System.err( 5789): java.io.FileNotFoundException: /proc/lcdsettings/idlemode: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:456)
W/System.err( 5789):	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
W/System.err( 5789):	at java.io.FileWriter.<init>(FileWriter.java:58)
W/System.err( 5789):	at com.biktor.gear2ksettings.bootNotifierService.onStartCommand(bootNotifierService.java:51)
W/System.err( 5789):	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
W/System.err( 5789):	at android.app.ActivityThread.access$2100(ActivityThread.java:151)
W/System.err( 5789):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
W/System.err( 5789):	at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err( 5789):	at android.os.Looper.loop(Looper.java:135)
W/System.err( 5789):	at android.app.ActivityThread.main(ActivityThread.java:5254)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Native Method)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
W/System.err( 5789): Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.Posix.open(Native Method)
W/System.err( 5789):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:442)
W/System.err( 5789):	... 13 more
W/System.err( 5789): java.io.FileNotFoundException: /proc/lcdsettings/partialmode: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:456)
W/System.err( 5789):	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
W/System.err( 5789):	at java.io.FileWriter.<init>(FileWriter.java:58)
W/System.err( 5789):	at com.biktor.gear2ksettings.bootNotifierService.onStartCommand(bootNotifierService.java:74)
W/System.err( 5789):	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
W/System.err( 5789):	at android.app.ActivityThread.access$2100(ActivityThread.java:151)
W/System.err( 5789):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
W/System.err( 5789):	at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err( 5789):	at android.os.Looper.loop(Looper.java:135)
W/System.err( 5789):	at android.app.ActivityThread.main(ActivityThread.java:5254)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Native Method)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
W/System.err( 5789): Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.Posix.open(Native Method)
W/System.err( 5789):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:442)
W/System.err( 5789):	... 13 more
W/System.err( 5789): java.io.FileNotFoundException: /proc/tssettings/touchwake: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:456)
W/System.err( 5789):	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
W/System.err( 5789):	at java.io.FileWriter.<init>(FileWriter.java:58)
W/System.err( 5789):	at com.biktor.gear2ksettings.bootNotifierService.onStartCommand(bootNotifierService.java:87)
W/System.err( 5789):	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
W/System.err( 5789):	at android.app.ActivityThread.access$2100(ActivityThread.java:151)
W/System.err( 5789):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
W/System.err( 5789):	at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err( 5789):	at android.os.Looper.loop(Looper.java:135)
W/System.err( 5789):	at android.app.ActivityThread.main(ActivityThread.java:5254)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Native Method)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
W/System.err( 5789): Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.Posix.open(Native Method)
W/System.err( 5789):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:442)
W/System.err( 5789):	... 13 more
W/System.err( 5789): java.io.FileNotFoundException: /proc/lcdsettings/ambient_brightness: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:456)
W/System.err( 5789):	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
W/System.err( 5789):	at java.io.FileWriter.<init>(FileWriter.java:58)
W/System.err( 5789):	at com.biktor.gear2ksettings.bootNotifierService.onStartCommand(bootNotifierService.java:111)
W/System.err( 5789):	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
W/System.err( 5789):	at android.app.ActivityThread.access$2100(ActivityThread.java:151)
W/System.err( 5789):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
W/System.err( 5789):	at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err( 5789):	at android.os.Looper.loop(Looper.java:135)
W/System.err( 5789):	at android.app.ActivityThread.main(ActivityThread.java:5254)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Native Method)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
W/System.err( 5789): Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.Posix.open(Native Method)
W/System.err( 5789):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:442)
W/System.err( 5789):	... 13 more
W/System.err( 5789): java.io.FileNotFoundException: /proc/vibrasettings/strength: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:456)
W/System.err( 5789):	at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
W/System.err( 5789):	at java.io.FileWriter.<init>(FileWriter.java:58)
W/System.err( 5789):	at com.biktor.gear2ksettings.bootNotifierService.onStartCommand(bootNotifierService.java:125)
W/System.err( 5789):	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2894)
W/System.err( 5789):	at android.app.ActivityThread.access$2100(ActivityThread.java:151)
W/System.err( 5789):	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
W/System.err( 5789):	at android.os.Handler.dispatchMessage(Handler.java:102)
W/System.err( 5789):	at android.os.Looper.loop(Looper.java:135)
W/System.err( 5789):	at android.app.ActivityThread.main(ActivityThread.java:5254)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Native Method)
W/System.err( 5789):	at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
W/System.err( 5789):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
W/System.err( 5789): Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W/System.err( 5789):	at libcore.io.Posix.open(Native Method)
W/System.err( 5789):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
W/System.err( 5789):	at libcore.io.IoBridge.open(IoBridge.java:442)
W/System.err( 5789):	... 13 more