Guys:
I'm testing at 115K under minicom, with a USA-49WLC and a USA-19QW, and
seeing the same problems with both. This is on a 2.6.30 amd64 kernel.
Put simply, the serial link seems to "lock" up after sending or
receiving just a few bytes, but the details of the hang aren't always
the same. Sometimes, it seems like all I/O has stopped; other times, I
lose the echo but the target responds as though the bytes are getting
through. And still other times, after I kill minicom the bytes show up
on my console. And finally, after killing and then restarting minicom
the bytes magically go through to the target.
Sometimes after the hang, restarting mincom is enough. Other times, I
have to remove the keyspan and usbserial modules, and then re-plug the
device. And still other times, the keyspan module claims to be in use
even though I have killall'ed minicom.
Regardless, I don't ever see anything suspicious in the dmesg log. I
don't know if this is a new problem with 2.6.30, as I haven't used these
Keyspan devices in quite a while.
Anyone seeing any problems with usbserial and/or keyspan drivers at
115K? Since the outbound data is coming from my keystrokes, I can't
imagine that I'm over-running a FIFO somewhere...
Kindest regards,
b.g.
--
Bill Gatliff
bgat@xxxxxxxxxxxxxxx
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