Re2: uplcom(4) problem
rsidd at online.fr
Sat Oct 16 20:27:30 PDT 2004
Quoting Matthew Dillon <dillon at xxxxxxxxxxxxxxxxxxxx>:
> : Hey Rahul, I got the PL2303 based usb->serial adapters but unfortunately
> : they appear to work perfectly. I connected up a modem via /dev/ucom0
> : and dialed an ISP using ppp and it works.
> I take it back!
> It turns out that 'ppp' works fine, but 'pppd' cannot seem to read any
> data back from the modem. When I used pppd to talk to the modem via
> ucom0 it failed to read() data from the modem even though the modem was
> definitely sending data to the computer. When I used pppd to talk to
> the modem via cuaa0 it read() the data fine (and also hit the continuous
> loop problem).
> So I am able to reproduce *BOTH* issues.
Well, great that you see the problem! Though in my case ppp didn't work either.
Also, when I tried backporting the linux 2.6 patch to linux 2.4, pppd
connects, but then doesn't seem to exchange any data after that. It seems
a simple backport so I can't see what is wrong (but maybe that's why
they haven't backported it upstream, even in the latest prepatch...)
I think my modem is the "HX" kind, that's what the linux 2.6 change seems to
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