Re: 2.2.12: serial driver swapping characters?y
The Doctor What (docwhat@gerf.org)
Wed, 15 Sep 1999 07:11:14 -0500
On Sat, Sep 11, 1999 at 02:38:13AM -0700, Orin Eman wrote:
> Probably. Check for overrun errors - in /proc/tty/driver/serial - they
> show as oe:. For example, I see
>
> 0: uart:16550A port:3F8 irq:4 baud:115200 tx:0 rx:61213 oe:5
>
> 5 overrun errors. Not surprising at 115200 baud on a K6-2 300???
> Well, I had an incoming stream at 115200 and it could display
> fine - until there was disk activity... when I would get the errors.
> To drop characters on a 16550 even at 115200 baud requires interrupts
> to be blocked for a long time.
>
> I have tried the irqtune program which rearranges the IRQ priorities
> and using it, I have received hundreds of MB of data with only
> a few overrun errors. However, I'm not sure of the safety of
> this program. It worked for me.
I will check the oe: on my machine at home, I can't test my work machine
because my batteries are running low on my palm.
I only connect at 57600. Both machines have problem with sound skipping,
the home machine much more so, when there is disk activity, or while
changing desktops in X.
I will see if I can turn up more info on my situation.
Ciao!
--
When privacy is outlawed... only the outlaws have privacy.
The Doctor What: A Holtje Production http://docwhat.gerf.org/
docwhat@gerf.org (finger docwhat@gerf.org for PGP key)
KF6VNC
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/