USV control with repeated USB disconnects

Reply: Hans Petter Selasky : "Re: USV control with repeated USB disconnects"
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From: Frank Behrens <frank_at_harz2022.behrens.de>
Date: Tue, 27 Sep 2022 15:45:17 UTC

Hi,

I could use some debugging help.
I try to connect a CyberPower USV to my FreeBSD server, the uhid, usbhid 
and hidbus modules are loaded and the new usb device is detected:
Sep 27 17:10:51 <kern.crit> kernel: ugen6.2: <CPS VP1200ELCD> at usbus6

But after some seconds the device is automatically disconnected and the 
detection process starts again:
Sep 27 17:10:59 <kern.crit> kernel: ugen6.2: <CPS VP1200ELCD> at usbus6 
(disconnected)
Sep 27 17:11:03 <kern.crit> kernel: ugen6.2: <CPS VP1200ELCD> at usbus6
Sep 27 17:11:11 <kern.crit> kernel: ugen6.2: <CPS VP1200ELCD> at usbus6 
(disconnected)

A change of cable and usb port did not help. I switched usb debugging 
on, but could not find any hint, that could guide me. I collected a lot 
of debugging information, an usb dump file
and system information in 
http://www2.behrens.de/usbusv_debug/usbusv_20220927.tbz

Does one of the specialists see what the problem is? Is there any 
additional information I should provide?

Kind regards,
     Frank

-- 
Frank Behrens
Osterwieck, Germany