MSGID: <10h9qcn$1114o$1@dont-email.me> 833d5df1
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: 1100
REPLYADDR bp@www.zefox.net
REPLYTO 3:633/10 UUCP
Theo wrote:
> bp@www.zefox.net wrote:
>> [apologies for the wide lines]
>>
>> Theo 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.
A chance dmesg output reported that owon was associated with tty1. The
obvious
candidate for conflict was gtkterm, which occupied tty0. Alas, killing gtkterm
and removing the ft232 usb-serial adapter didn't fix/change anything.
As an aside, I also tried connecting with the Owon tty using gtkterm.
Can't get a rise out of it by tinkering with the speed or sending break.
That probably isn't relevant, but it did surprise me a little. I thought
at least some garbage would appear if I sent a carriage return.
Thanks for reading,
bob prohaska
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* Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)
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