On 07/07/2018 04:02, bob prohaska wrote:
> Jim Jackson wrote:
>> On 2018-06-20, bob prohaska wrote:
>>> I found a web page suggesting "vcgencmd measure_volts core"
>>
>> I got initialization failed  until I ran it as root (or used sudo)
>
> Thank you! I shoulda guessed....

Normally it works without sudo, though. Could be something wrong with
your Raspbian installation or at least s/t non-standard, perhaps like
using a different user account than pi.

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