From: jbradford@dial.pipex.com
To: ahu@ds9a.nl (bert hubert)
Cc: linux-kernel@vger.kernel.org, rmk@arm.linux.org.uk
Subject: Re: 2.5.x and 8250 UART problems
Date: Sat, 5 Oct 2002 16:18:39 +0100 (BST) [thread overview]
Message-ID: <200210051518.g95FIdPr000532@darkstar.example.net> (raw)
In-Reply-To: <20021005150715.GA30761@outpost.ds9a.nl> from "bert hubert" at Oct 05, 2002 05:07:15 PM
> > I've noticed that 8250 UART based serial port performance is poorer in
> > 2.5.x than 2.4.x and 2.2.x, on a couple of my machines.
> >
> > 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.
>
> Have you tried 'hdparm -u'?
Hmmm, I can do, but I thought it was a Bad Thing (tm) for ISA based controllers? I could be wrong...
John.
next prev parent reply other threads:[~2002-10-05 15:05 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 [this message]
2002-10-05 19:59 ` Russell King
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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