Kris Karas wrote:
>
> joe wrote:
>
> > I'm new to linux and i was wondering why my conn. is
> > so slow,.i havent played with ppp at all, just set it up through the
> > network configuration.
>
> There are several possibilities I can think of:
>
> 2. Poor choice of baud rate, perhaps automatically determined by the setup
> script if you have an older serial interface (UART chip). If the kernel's
> bootup messages report your serial ships as 16450 instead of 16550(A) or
> later, this could be your problem.
>
> 3. Serial stream errors, usually caused by lost bytes due to some device
> holding interrupts disabled for too long. To check it, while ppp is
> connected, use the "ifconfig" command to show you the stats on the various
> interfaces. Look for frame/crc/overrun errors on the receive and transmit
> streams of the ppp0 device. If you see them, then this is the cause. The
> usual culprit here is an IDE disk drive that operates with interrupts disabled
> (sadly the default). Try "hdparm /dev/hda" to show your hard drive's
> parameters, and try "hdparm /dev/hda -u 1" to enable "interrupt unmasking" -
> most likely safe unless you have a really old hard drive. Obviously, change
> /dev/hda to whatever is the device name of the IDE drive that has your Linux
> partition on it. (Of course, warning/disclaimer: if you enable interrupt
> unmasking, test it with "hdparm -t" to make sure your drive is compatible,
> else you could suffer massive filesystem damage!!!)
You can also try to use "irqtune", a module that can change your
interrupt
priorities. Normally the EIDE-Interface has a higher priority and
therefore
the serial stream can be interrupted. Just set the IRQ of your tty
higher
than the EIDE IRQ.
Regards,
Hermann
--
Hermann Himmelbauer
E-Mail: [EMAIL PROTECTED]
Addr.: A-3400 Klosterneuburg Martinstr. 18/2 Austria
Tel: ++43-2243-22305-24 / ++43-2243-26562, Fax: ++43-2243-22305-27
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