Starting charging from power off will cause booting to fastboot mode

[mokmeister]

If the phone battery fully discharges and then is plugged in to charge, the phone will instead boot to fast boot. Work around for this is to disconnect the cable, reboot, let the phone boot to OS and then plug in to charge.

[mokmeister]

It has been suggested that it may be a porting issue where the port is missing offline charging support.

[JamiKettunen]

It should be noted that this happens anytime the phone is powered on by plugging it to a power source (even if it isn't a computer); @NotKit has suggested that the device should be made to always boot Ubuntu Touch for now until support for offline charging is added.

[gbdomubpkm]

Hello.
Received Volla yesterday (great smartphone) and first uses (bug reports coming soon).
First charge (I didn't know if the battery was totally full): this bug is still there (after update RC 2020-W49/2): any progress?
My immediate solution was to make a forced shutdown (power button held down) to exit fastboot mode.

[JamiKettunen]

@gbdomubpkm Halium/initramfs-tools-halium#22 will fix this whenever it gets merged.

[gbdomubpkm]

@JamiKettunen Thank you for the concerned link. This would be great for OTA-15 !

[gbdomubpkm]

! will be happy not to see fastboot in this case ! 😉

[JamiKettunen]

Now that the pull request is merged, the fix should be in tomorrow's Development channel update. I'll test it then and close this if the issue is fixed.

[JamiKettunen]

I've confirmed that on Development channel build 2021-03-25 now trying to enter charging mode reboots into Ubuntu Touch instead (a much better alternative for e.g. fast charging than rebooting into into fastboot mode after failing to boot the charging UI). There's still some work to do here to actually fix the charging mode, but for the end users this should be a solid workaround for now.

[mardy]

Thanks for your work on this, Jami! Do we have a bug then for fixing this for good, that is reboot into charging mode? I could try to help, if you give me some hints at what needs to be done.

[gbdomubpkm]

I discovered today that this issue seems fully solved : in last RC, there is now real charging with starting power off.
Thanks to the developper(s) involved. 👍

However, i noticed :
When charging Power off:

• the screen keeps a certain luminescence ;
• the phone can be restarted only if the charging cable is unplugged: otherwise, pressing the power button seems to cause a blocking of the charging gauge but the phone does not restart.

[gbdomubpkm]

Charging from power off seems to heat up the back of the phone a lot currently (RC 22) : is this a normal effect? This is much less the case when charging from smartphone on.