[guest]

Originally Posted by mdp

The first question would be: which system apps did you remove?

Almost immediately I've removed:
BasicDreams.apk, BasicDreams.odex, BoyueImage.apk, BoyueImage.odex, BoyueLock.apk, BoyueLock.odex, Calculator.odex, Calendar.apk, Calendar.odex, ComicReader.apk, Contacts.odex, DeskClock.odex, DeviceTest.apk, DeviceTest.odex, Dict.apk, Email.apk, Email.odex, Exchange2.apk, Exchange2.odex, Galaxy4.odex, Gallery.odex, Gmail.apk, GmsCore.apk, GoogleContactsSyncAdapter.apk, GoogleLoginService.apk, GoogleServicesFramework.apk, HoloSpiralWallpaper.odex, LiveWallpapers.odex, LiveWallpapersPicker.odex, MagicSmokeWallpapers.odex, Music.apk, Music.odex, MusicFX.odex, NoiseField.odex, NotePad.apk, OSenseUpdate.apk, OSenseUpdate.odex, OfficeReader.apk, OpenWnn.apk, OpenWnn.odex, PhaseBeam.odex, Phone.odex, Phonesky.apk, PhotoTable.odex, PicoTts.odex, PinyinIME.apk, PinyinIME.odex, QuickSearchBox.apk, QuickSearchBox.odex, RKUpdateService.apk, RKUpdateService.odex, SoundRecorder.odex, UserManual.apk, UserManual.odex, VideoEditor.odex, WifiTransfer.apk, WifiTransfer.odex, com.android.vending.apk
and I don't really know how the device works with those app installed.

Later I removed:
AdobeReader.apk, BackupRestoreConfirmation.apk, BackupRestoreConfirmation.odex, Bluetooth.apk, Bluetooth.odex, BoyueBooks.apk, BoyueBooks.odex, Browser.apk, Browser.odex, Cover.apk, FBReader.apk, FileManager.apk, FontManager.apk, FontManager.odex, HTMLViewer.apk, HTMLViewer.odex, Launcher2.apk, Launcher2.odex, SharedStorageBackup.apk, SharedStorageBackup.odex, TelephonyProvider.odex, UserDictionaryProvider.odex, VpnDialogs.apk, VpnDialogs.odex, WAPPushManager.odex, bicp.apk
but I haven't noticed, and wasn't able to measure significant increase in the battery life so they're back.

Better battery life can be noticed after removing:
Settings.apk, Settings.odex
so now settings app is gone.

Originally Posted by mdp

And: you only have those few lines as "CPU usage"? My list is huge (comparatively).

In top I've limited number of processes with the parameter. There are more processes running.
In dumpsys there are more processes, but for all others there is around 0% usage, so I didn't show those.

Originally Posted by mdp

As a matter of fact, the "idle" percentages of `top` are more reassuring (and I cannot match them with the load values) - but I see some misbehaviour.

Probably I should have mentioned before. Of course those 0% were taken when the device wasn't doing very much. And probably the screen was off. (those 1% in dumpsys when it should be 0% was for sure taken with the screen off).
But a few minutes ago, with the screen on, top was showing that irq/171-rk818 was using 3%. Now, like for all other processes, top is again showing 0% (screen still is on).

Originally Posted by mdp

One of the problems I am experiencing is: the device seems to fall asleep like a narcoleptic. When you are "flipping pages" interleaving long breaks, you may not notice it, but if you are using an interactive application - such as, you are typing on a BlueTooth keyboard - after a little while you can bang all you want on the keyboard but the screen will remain frozen. Touch on the screen, and your past bangs will be rendered in a burst.

I need the device to work on interactive applications: I need the way and the option to inhibit that it falls asleep.

I don't use the device that way, so I didn't test it, but I think that there are some solutions for your problem. For example you could write an app that uses wake lock. Or easier use Automate (https://play.google.com/store/apps/d...malab.automate) - you can create a graph that keeps wake lock when the bluetooth in on, and releases the lock when bluetooth is off.