Very Computer

by **Nathan Bushma** » Sat, 13 Nov 1999 04:00:00

My modem (on ttyS1) was working fine for dial-up PPP w/ RedHat 6.1's RC3
program.

One time when I was trying to hang up, the modem stayed online.
After rebooting, the programs that use the modem all return "Input/output
error"

Is there some way for me to manually reset the serial port? Any idea as
to what is wrong?

by **Dances With Crow** » Sun, 14 Nov 1999 04:00:00

> One time when I was trying to hang up, the modem stayed online.
> After rebooting, the programs that use the modem all return "Input/output
> error"

> Is there some way for me to manually reset the serial port? Any idea as
> to what is wrong?

Well, if it's an external modem, unplug the darn thing for a few
seconds, and replug it. If it's an ISA/PCI card, *shut the system down*
for about 5-10 seconds and restart... that will give the modem a "hard
boot." In case that's not the problem, make sure the modem itself has
the following permissions:

crw-rw---- root uucp 4, 2 /dev/ttyS1

(at least, that's how it's set up on my system...) If the entry for
/dev/ttyS1 doesn't look like that, then:

chown root.uucp /dev/ttyS1
chmod 660 /dev/ttyS1

Hopefully, that will fix the problem. Good luck....

--MG
"Poets of this age work for minimum wage!"

Very Computer

Setial Port Error "Input/output error"

Setial Port Error "Input/output error"

Setial Port Error "Input/output error"