> For the moment we solved the issue by booting some older r28nnnn
> memstick, writing a correct date with ntpdate into the RTC and rebooted
> without poweroff. It seems that the RTC survives even some short
> powercyle.
> The CMOS battery is soldered on the motherboard of the Acer C720, i.e.
> no chance to be replaced.
> The issue must be fixed in FreeBSD, i.e. it should boot even with a
> broken RTC. Should I file a PR for this?

Yes, please file a PR.

p...@opsec.eu            +49 171 3101372                         2 years to go !
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