Werner

Thanks for trying though

Aight, I was able to do some testing with the powerbank mentioned above and I guess I was lucky I did not kill my board with it. An overview: From the left to right. First the SBC was powered by the powerbank with close to 5 volts. Then I attached mains 5v to the powerbank and got a 9 volt spike which luckily was short enough (around 1ms with inclined edges) to not cause any damage. While charging the voltage drops a bit and seems quite rough. Then I disconnected mains again and you can see a voltage drop that causes the board to restart. Here it is in high resolution: The voltage came as mentioned above not very high already, very close to undervolage. The drop to two volts finally kills it and let it reboot as soon as the voltage rises again. tl;dr: I'll discard the idea using the powerbank to create a crude UPS.

AFAIK for some people the H6 did non run stable with full speed. Therefore it has been limited to stable 1,5GHz.

if it does not have to be a all in one package you can still achieve this by reducing the 5V supply to 3.3v somehow (like putting 4 1N4007 diodes in series to create a drop of 2x 0.7 volts and yes, that would be a very crude hack ^^) and put it on a GPIO pin. If there is an outtage the board recognizes it.

Interesting. The downside I noticed so far is that the loading current seems to be limited to .5 amps which is not enough if you run certain SBCs with a decent load...

Maybe. Lets find out. https://github.com/armbian/build/pull/1804

That was also my first idea and it redirected me to a thread on reddit which was not that helpful. I also could not find anything in the ebay description that could suggest such a feature. Probably because it is not fully functional due to the voltage drop mentioned above. Maybe I can find some time and put an oscilloscope in between to see what we are dealing with...

Headless it is perfectly fine in my opinion. No idea about HDMI output though. Keep in mind that the CPU is capped to 1,5GHz for stability reasons. Older images offering the full 1.8 GHz did not work properly for some people.

Wait. The PCB was broken, the cells not. And I fixed it that time. It can be charged and discharged the same time. The problem is that as soon as I disconnect mains the SBC restarts probably due to voltage drop on switch-over. This may be fixable using a small capacitor or something. I found the PCB I bought: https://www.ebay.com/itm/5V-2A-Power-Bank-Charger-Board-Charging-Circuit-Board-Step-Up-Module-Dual-USB/362589551623

Unfortunately no clue. A few years ago I had one bank that supported this but it got broken in the meantime....

I am not sure if this data is very meaningful since most image downloads happen by direct download and not by torrent I guess...

What about a small powerbank? Either selfmade with a premade PCB and one or two cells or a ready to use one. Just make sure it can be charged and discharged the same time. Split the input voltage to the powerbank and a GPIO pin. Once it drops create a small script that notice the drop on the GPIO and sends a shutdown command.

I never said that we should not use email verification I just wanted to mention that this is just a low end protection against spamers.

True. Email validation is probably the easiest thing spamer can bypass by either using trashmail services or script-based creating accounts from any freemail provider.

Depends on your board. Asuming you have an Allwinner H2/H3 based one it is not possible (yet).

Validation automatically gained immediately after registration and email verification every posting needs approval Newbie automatically gained if registered at least one day AND has two approved postings has permission to post without approvial but is limited to edit up to one hour after post creating Member automatically gained if registered at least seven days have five postings has permission to edit posts without limit My suggestion. From a technical point if view it is recommended to do such discussions unpublic since there are also advanced spamer that especially looking for such limits in postings or FAQs and such to adjust their bots matching each individual website.

Sure it is. Though spammers have infinite resources. We do not. +1

Unless you need this very particular kernel version there is no need for such "hacks" . You can always use the build script to create a full kernel package for your board which will include a headers package as well. Proper header packages will be provided in future again. Check

Guess I am one of the lucky ones that have a v1.1 labeled OPi0 which delivers plausible temperatures...

Try using extundelete on the sd card.

Probably yes...if you tested another sd card and PSU to eliminate those as cause, then no clue. Did your board work earlier or is it new? I do not have an Zero Plus 2 H3 myself so I cannot verify that it boots on a known to work sbc. Though I am pretty sure other users here have this board in their collection :).

I just want to virtually eliminate that trivial chance

At the first boot the filesystem expands itself over the whole sd card which can take a few mintes or more depending on the actual speed and size of the sd card.

add verbosity=7 to your /boot/armbianEnv.txt

There seems to be a quite simple solution: It is generally a good advice to not use any non-stable releases unless you know what you are doing