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From: Russell King <rmk@arm.linux.org.uk>
To: jbradford@dial.pipex.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.5.x and 8250 UART problems
Date: Sat, 5 Oct 2002 20:59:54 +0100	[thread overview]
Message-ID: <20021005205954.A1682@flint.arm.linux.org.uk> (raw)
In-Reply-To: <200210051506.g95F6jfL000423@darkstar.example.net>; from jbradford@dial.pipex.com on Sat, Oct 05, 2002 at 04:06:45PM +0100

On Sat, Oct 05, 2002 at 04:06:45PM +0100, jbradford@dial.pipex.com wrote:
> The 486 SX-20 with 4 MB RAM, running 2.2.21 reliably achieves about 650
> BPS download from another machine, with the port runnnig at 9600 bps.
> With 2.5.40, many characters are lost at 9600, making, e.g. a ZModem
> transfer retry for almost every block.

Ok, we need to find out where stuff is getting dropped.  Dumping
/proc/tty/driver/serial is always a good idea when reporting anything
like this.

The important thing is the change in the counters.  Can you supply the
port in question both before and after the zmodem run please?

Thanks.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html


  parent reply	other threads:[~2002-10-05 19:54 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-05 15:06 2.5.x and 8250 UART problems jbradford
2002-10-05 15:07 ` bert hubert
2002-10-05 15:18   ` jbradford
2002-10-05 19:59 ` Russell King [this message]
2002-10-05 21:12   ` jbradford
  -- strict thread matches above, loose matches on Subject: below --
2002-10-05 19:43 Hell.Surfers
2002-10-05 20:01 ` jbradford
2002-10-05 15:05 jbradford

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