From: bert hubert <ahu@ds9a.nl>
To: jbradford@dial.pipex.com
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 17:07:15 +0200 [thread overview]
Message-ID: <20021005150715.GA30761@outpost.ds9a.nl> (raw)
In-Reply-To: <200210051506.g95F6jfL000423@darkstar.example.net>
On Sat, Oct 05, 2002 at 04:06:45PM +0100, jbradford@dial.pipex.com wrote:
> 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'?
>
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next prev parent reply other threads:[~2002-10-05 15:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-05 15:06 jbradford
2002-10-05 15:07 ` bert hubert [this message]
2002-10-05 15:18 ` jbradford
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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