Thread: Firmware 4.30.18838
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Old 11-04-2021, 09:06 PM   #33
davidfor
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by NiLuJe View Post
Good luck with that, as the power controls for BT & Wi-Fi are currently tied together in the kernel (for hardware reasons, at a quick glance: it's the same chip).

(c.f., `_ntx_wifi_bt_power_ctrl` @ arch/arm/mach-sunxi/sunxi_ntx_io.c )
Chipwise, that is what I expected. And powerwise, it makes sense. But, connectingwise, they are independent. I can turn off WiFi so it doesn't sync and have Bluetooth on for playback. Or disable Bluetooth but let WiFi connect so I can look something up on Wikipedia while reading.

I have more concern about Bluetooth being active when I don't need it than WiFi. The WiFi is always initialised by the device and sleeps between activity. And I understand when it will be in use. Bluetooth seems to be scanning all the time and looking for devices and announcing itself to other devices. The Kobo devices might not be doing this. Maybe they are only doing this when I bring up the Bluetooth connection dialog, but, at this point, I don't know enough to be sure.
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