Re: serial ports no longer working after upgrade to RedHat 9

From: ynotssor ("ynotssor")
Date: 10/25/03 

Date: Fri, 24 Oct 2003 16:22:53 -0700

"Bruce Pennypacker" <bruce@pennypacker.org> wrote in message
news:bncaef$nqr$1@news.directhit.com

> I don't know if this was a major problem or not but I changed the
> permissions back anyway. No matter what I've tried, however, I've
> been unable to access either serial port since the upgrade. When the
> systems boot up they do see the ports. The syslog shows the
> following:
>
> Oct 24 17:22:56 homer kernel: ttyS00 at 0x03f8 (irq = 4) is a 16550A
> Oct 24 17:22:56 homer kernel: ttyS01 at 0x02f8 (irq = 3) is a 16550A
>
> Yet whenever I try to use minicom it simply fails to do anything, and
> mingetty results in the following in the syslog:
>
> Oct 24 18:51:16 homer mingetty[954]: /dev/ttyS0: cannot open tty:
> Operation not permitted
> Oct 24 18:51:26 homer mingetty[956]: /dev/ttyS1: cannot open tty:
> Operation not permitted
>
> Any thoughts as to what might be happening?

What is the uid:gid of the user running minicom, and how do those compare
with the device uid:gid:permissions? 

--
use hotmail com for any email replies
-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----==  Over 100,000 Newsgroups - 19 Different Servers! =-----

Relevant Pages

  • Re: serial ports no longer working after upgrade to RedHat 9
    ... No matter what I've tried, however, I've been ... > unable to access either serial port since the upgrade. ... The syslog shows the following: ... The boot messages refer to ttyS00 and ttyS01. ...
    (linux.redhat.misc)
  • Re: serial ports no longer working after upgrade to RedHat 9
    ... No matter what I've tried, however, I've been ... > unable to access either serial port since the upgrade. ... The syslog shows the following: ... The boot messages refer to ttyS00 and ttyS01. ...
    (comp.os.linux.misc)
  • Re: serial ports no longer working after upgrade to RedHat 9
    ... No matter what I've tried, however, I've ... > been unable to access either serial port since the upgrade. ... The syslog shows the ... What is the uid:gid of the user running minicom, ...
    (comp.os.linux.misc)
  • Re: rs232 reading problem explanation
    ... > that arrive to the serial port of the pda are simply bits, no more, it ... UNICODE is only required for api calls and I ... mentioned it doesn't matter if you write ascii error messages to a file as ...
    (microsoft.public.windowsce.embedded.vc)
  • Re: [opensuse] How to monitor Linux systems from a focal/central point (was: ranting and raving abo
    ... If the syslog was really so central in enterprise real-time monitoring ... It has a main dumb terminal on a serial port, and also a serial port printer. ... The card may control instead an X.25 connection, which can be used for file transfers and some more terminals. ... They have Unix machines with expensive proprietary software that collect each report, save them into a database record, do some analysis, raise alerts based on importance... ...
    (SuSE)