Displaying 4 results from an estimated 4 matches for "16316401".
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1.386401
2024 Sep 28
2
Weekend Puzzle: computer posing as an UPS
...orning I found it turned off (red light on the
Pi).
* Per
https://stackoverflow.com/questions/4702216/controlling-a-usb-power-supply-on-off-with-linux
it seems not possible to programmatically truly power-cycle USB port/hub,
as 5V pins are "always on"; and per
https://stackoverflow.com/a/16316401/4715872 - at least not on MoBo ports
(some hubs may have invested into being fully up to spec and control power
fully). The referenced uhubctl <https://github.com/mvp/uhubctl> on my PC
said "No compatible devices detected!" so I guess that's it.
* Whatever I could find with (su...
2024 Sep 28
1
Weekend Puzzle: computer posing as an UPS
...light on the
> Pi).
>
> * Per
> https://stackoverflow.com/questions/4702216/controlling-a-usb-power-supply-on-off-with-linux
> it seems not possible to programmatically truly power-cycle USB port/hub,
> as 5V pins are "always on"; and per
> https://stackoverflow.com/a/16316401/4715872 - at least not on MoBo ports
> (some hubs may have invested into being fully up to spec and control power
> fully). The referenced uhubctl <https://github.com/mvp/uhubctl> on my PC
> said "No compatible devices detected!" so I guess that's it.
>
> * Whatev...
2024 Sep 28
1
Weekend Puzzle: computer posing as an UPS
...gt;>
>> * Per
>> https://stackoverflow.com/questions/4702216/controlling-a-usb-power-supply-on-off-with-linux
>> it seems not possible to programmatically truly power-cycle USB port/hub,
>> as 5V pins are "always on"; and per
>> https://stackoverflow.com/a/16316401/4715872 - at least not on MoBo ports
>> (some hubs may have invested into being fully up to spec and control power
>> fully). The referenced uhubctl <https://github.com/mvp/uhubctl> on my PC
>> said "No compatible devices detected!" so I guess that's it.
>&g...
2024 Sep 27
1
Weekend Puzzle: computer posing as an UPS
FWIW, a few lessons learned:
* Different USB-A sized ports (even if marked USB-3.2) did not prove a
stable source, with Pi5 occasionally turning off or rebooting. Sort of
behaved well for days, but as soon as I added load like package installs or
NUT builds, it did not survive 5 minutes...
* Might be the MoBo turning off or cycling the port due to "overload"?..
* Tried the