More problems, COM4 (cua3) is always "busy" or "locked"

More problems, COM4 (cua3) is always "busy" or "locked"

Post by Joseph N Chadderd » Tue, 22 Jun 1993 10:55:17



First I want to thank everyone for helping me find a low-level formatter
for my SCSI drive.  Now I have Linux up and running and have not
modified many files yet.  My problem is now when I use Seyon or even
minicom, my modem is always busy or locked (or so these programs tell
me)  /dev/modem is linked to /dev/cua3.  Previously, when I have run
Linux, I have never had this problem, so what gives??

other notes:my mouse is linked to cua0 and works fine cua1 is presently
not used, but is an external connector cua2 doesn't exist at all and
cua3 is my internal 2400baud modem.
I just installed from SLS1.02 and only modified enough files for X to
work and then installed seyon.  Other than that, nothing has been
changed.  When booting, it does auto detect these three serial ports.

Any help would be appreciated.
        THANKS,
                Nelson

 
 
 

More problems, COM4 (cua3) is always "busy" or "locked"

Post by James A Robins » Tue, 22 Jun 1993 14:23:32



Quote:>First I want to thank everyone for helping me find a low-level formatter
>for my SCSI drive.  Now I have Linux up and running and have not
>modified many files yet.  My problem is now when I use Seyon or even
>minicom, my modem is always busy or locked (or so these programs tell
>me)  /dev/modem is linked to /dev/cua3.  Previously, when I have run
>Linux, I have never had this problem, so what gives??

You need to MAKE a cua3 'mknod /dev/cua3 c 5 (whatever minor number ttyS3 is)
At least that is the only it works for me.

Quote:>other notes:my mouse is linked to cua0 and works fine cua1 is presently
>not used, but is an external connector cua2 doesn't exist at all and
>cua3 is my internal 2400baud modem.
>I just installed from SLS1.02 and only modified enough files for X to
>work and then installed seyon.  Other than that, nothing has been
>changed.  When booting, it does auto detect these three serial ports.

All I can advise is to make all new cua? files with a major number
of 5 and a minor number corresponding to the ttyS?.

Hope you get it fixed.

Jim

 
 
 

More problems, COM4 (cua3) is always "busy" or "locked"

Post by Stephen Tweed » Wed, 23 Jun 1993 12:12:56



Quote:> First I want to thank everyone for helping me find a low-level formatter
> for my SCSI drive.  Now I have Linux up and running and have not
> modified many files yet.  My problem is now when I use Seyon or even
> minicom, my modem is always busy or locked (or so these programs tell
> me)  /dev/modem is linked to /dev/cua3.  Previously, when I have run
> Linux, I have never had this problem, so what gives??

You have probably had a crash while Seyon was running, and a lock file
was left lying around.  The communications programs create lock files
in standard places while a com port is in use, to prevent two programs
trying to access the port simultaneously.

The lock files are either in /tmp or somewhere in /usr/spool (I forget
which); they have distinctive names which should be easy to spot.  It
is quite common (and safe) to delete these in your /etc/rc script to
avoid exactly this kind of trouble.

Cheers,
 Stephen.
---

Department of Computer Science, Edinburgh University, Scotland.

 
 
 

More problems, COM4 (cua3) is always "busy" or "locked"

Post by Udo Thi » Wed, 30 Jun 1993 23:34:41



[...]

Quote:>      My problem is now when I use Seyon or even
>      minicom, my modem is always busy or locked (or so these programs tell
>      me)  /dev/modem is linked to /dev/cua3.  Previously, when I have run
>      Linux, I have never had this problem, so what gives??

I had the same problem. You can do the following: start Syeon. enter the settings-menu.
change the modem-device to /dev/ttys3. try to dial. there should be an error. change it
back to /dev/modem. then it should work.

Later when I re-compiled the Kernel I noticed a question something like
"Do you want serial lines to be inited at boot up?"

I answered yes and since then I nerver had problems with that.

Quote:>      Any help would be appreciated.
>            THANKS,
>                    Nelson

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