Hi serpent,
I’m sorry to hear about these issues. I see two distinct problems here:
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Your A311D is running abnormally hot. Normally it should run at around 50 degrees with heatsink. And it can also run much longer without a heatsink than i.MX8MQ because it is much more efficient. So something is probably wrong at the hardware level (I don’t suppose you run all the cores at 100% all the time). Is the heatsink attached correctly incl the thermal pad, and the plastic removed from the thermal pad? If so, there might be some soldering issue on the RCM4 adapter. If you can’t find anything obvious and it still gets hot, please contact support@mntre.com and we’ll sort it out with a replacement. But also, the current is abnormal: 0.56A is too high for an idle desktop. For me it’s around 0.35-0.4A with normal use (browser, display at full brightness).
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There is a newly known issue with MB2.5 where it charges at a quite high peak current which can be more than 60W (more like 70W). So the default charger and USB-C chargers can be unhappy about this and turn off. But what works for me and another user is this patch where we wait a little bit after connecting the charger before enabling the full current, maybe you can give it a try: WIP: on mb25, soft-start charging, i.e. wait a bit after charger is connected (!66) · Merge requests · Reform / reform · GitLab