Re: 2.5.x and 8250 UART problems

bert hubert (ahu@ds9a.nl)
Sat, 5 Oct 2002 17:07:15 +0200


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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