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@MSGID: <10h8vep$oq21$3@dont-email.me> 8b22ba69
@REPLY: <6bm*d+FtA@news.chiark.greenend.org.uk>
c06f328e
@PID: PyGate 1.5.2
@TID: PyGate/Linux 1.5.2
@CHRS: ASCII 1
@TZUTC: 0000
@REPLYADDR tnp@invalid.invalid
@REPLYTO 3:633/10 UUCP
On 09/12/2025 10:46, Theo wrote:
>
bp@www.zefox.net wrote:
>> [apologies for the wide lines]
>>
>> Theo <
theom+news@chiark.greenend.org.uk> wrote:
>>>
>>> Depending on what kind of device it appears as (serial, keyboard, mass
>>> storage, network, ...) see if you can work out what other app might have
>>> grabbed it. (`sudo lsof` is handy here, if it appears as a device node that
>>> you can grep for)
>>
>> Sudo lsof is loquatious, but not obviously informative. These tests were
>> on a Pi5 running up-to-date Bookworm, but the behavior is outwardly the
>> same as Trixie on Pi2.
>
> What I`m looking for is something having grabbed the USB device. This is
> hard to specify without knowing how the OWON does its USB, but for example
> if it was serial I`d `lsof | grep /dev/tty` and look for things using the
> /dev/ttyUSB0 or /devttyACM0 device the OWON probably uses.
>
> Since the OWON app has failed to grab the USB you`re looking for other apps
> that have grabbed it, ie not at the OWON app.
>
> Theo
OOI I discovered a weird thing
IF I have a raspberry PI PICO plugged into my desktop as a power supply
and running code , then my PC does not detect when the samsung mobile
phone is plugged in...unless I unplug the PI first...
My friend also reports weird shit with his (PI`s) USB. I think it`s not
as rock solid as we sometimes assume.
--
There is something fascinating about science. One gets such wholesale
returns of conjecture out of such a trifling investment of fact.
Mark Twain
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* Origin: Dragon`s Lair, PyGate NNTP<>Fido Gate (3:633/10)
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