Re: Transfers interrupted when uploading
It seems my problem is in the buffer of the serial getting an overflow of
data it can't handle. How could I fix this?
It's a PCMCIA modem, and the hardware flow control won't work.
Disabling it and enabling the software one, Xon/Xoff, solves partially the
problem.
Partially, because soetimes the transfer freezes as with the hardware flow
control. So, it's not a stable solution.
I could maybe just buy a new one. But I'd like to know if the problem is
really the PCMCIA, in which case buying a new one is sensible, or if it's
some other hardware in my laptop which will make the same problem appear
regardless which modem I slot in.
Thanks,
ALberto Bigazzi
-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
Alberto Bigazzi, PhD.
Research Associate,
Dept. of Mathematics,
Politecnico di Milano,
Piazza Leonardo da Vinci 32,
20133 Milano (ITALY)
-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
Phone: +39-02-2399 4508
Fax: +39-02-2399 4568
email: alberto.bigazzi@mate.polimi.it
http://www1.mate.polimi.it/~albbig
-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
On Mon, 25 Jun 2001, Alberto Bigazzi wrote:
>
> Dear all,
>
> I have a very nasty problem: I can't upload files from my machine.
>
> I'm connected to the Internet via an ordinary dialup (ppp). All goes
> smooth, I can navigate and work remotely via telnet or ssh.
> I'm running a potato 2.2r0 on a laptop.
>
> Problems arise when I try to serve files by either uploading them directly
> via ssh or ftp towards some remote, or by connecting to a remote and try
> to
> retrieve files from my machine.
>
> What happens is that after the first few Kb's, the transfer hangs and I
> can
> only disconnect by hanging up. Note that SMALL, ascii tranfers end
> succesfully.
>
> This is an example of what /var/log/messages tells me in one case where
> I was trying from a
> remote to log into my machine and get files via ftp:
>
> --------------------------------------
> Jun 24 19:25:46 paperoga wu-ftpd[294]: FTP LOGIN FROM
> pippo.pluto.paperoga.it
> [xxx.xxx.xxx.xxx] pippo
> Jun 24 19:29:05 paperoga pppd[254]: No response to 4 echo-requests
> Jun 24 19:29:05 paperoga pppd[254]: Serial link appears to be
> disconnected.
> Jun 24 19:29:35 paperoga pppd[254]: Connection terminated.
> Jun 24 19:29:35 paperoga pppd[254]: Connect time 9.2 minutes.
> Jun 24 19:29:35 paperoga pppd[254]: Sent 56535 bytes, received 45908
> bytes.
> Jun 24 19:29:36 paperoga pppd[254]: Hangup (SIGHUP)
> Jun 24 19:29:36 paperoga pppd[254]: Exit.
> --------------------------------------
>
> an example of the progress of an ftp session is:
>
> 150 Opening BINARY mode data connection for celle.tar.gz
> (xxx.yyy.zzz.kkk,1100).
> ################################################################
> (64x1024 and then serial line hangs)
>
> Analogously an ssh session hangs after:
> celle.tar.gz 100% |*****************************| 155 KB
> 00:00
>
>
> Does anybody have any clue of what is happening to my transfers?
> (are there other logs which may tell me more?)
> Do I have to give away my monster-laptop to my newborn to amuse
> himself?....
>
> Thanks very much.
> Alberto
>
> -/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
> Alberto Bigazzi, PhD.
> Research Associate,
> Dept. of Mathematics,
> Politecnico di Milano,
> Piazza Leonardo da Vinci 32,
> 20133 Milano (ITALY)
> -/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
> Phone: +39-02-2399 4508
> Fax: +39-02-2399 4568
> email: alberto.bigazzi@mate.polimi.it
> http://www1.mate.polimi.it/~albbig
> -/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
>
>
>
>
Reply to: