TECHNICAL INFORMATION DOCUMENT

TITLE:              PTF618 - asyc fix to drop RTS
DOCUMENT ID:        TID300044
DOCUMENT REVISION:  B
DATE:               25JAN95
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         PTF618

PRODUCT and VERSION:
UnixWare 1.1

ABSTRACT:

The ptf618 file contains UnixWare PTF618 - asyc driver fix to 
ensure that RTS is dropped on device close. This PTF contains 
an updated version of asyc driver.  This version of asyc driver 
ensures that after an asyncronous device is closed (i.e., DTR has 
been dropped), RTS is also dropped.  This fix is needed to support 
digital modems that expect RTS to be dropped when DTR is dropped. 
PTF618 should be installed on UnixWare 1.1 and preferrably with 
update 1.1.1 already installed.

SYMPTOM

Prior to this patch, RTS was not always dropped after an asyncronous device
was closed.

SOLUTION

Apply the ptf618 file.


Installation Instructions:

DATATYPE: datastream

1.  Download the ptf618.Z and ptf618.txt files to the /tmp directory  
    on your machine.

2.  Read the release notes contained in this file.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

     $su
     # uncompress /tmp/ptf618.Z
     #pkgadd -d /tmp/ptf618 ptf618

Solution Specifics

1. General Description

These release notes acquaint you with the contents of UnixWare 
PTF618 - asyc driver fix to ensure that RTS is dropped on device close.

2. New Features

This PTF contains an updated version of asyc driver.  This version of 
asyc driver ensures that after an asyncronous device is closed 
(i.e., DTR has been dropped), RTS is also dropped.  This fix is 
needed to support digital modems that expect RTS to be dropped 
when DTR is dropped.

3. Software Notes and Recommendations

PTF618 should be installed on UnixWare 1.1 and preferrably with 
update 1.1.1 already installed.

NOTE: This patch modifies same files as ptf122, update1.1.1 and 
update1.1.2.  PTF610 and PTF618 can co-exist and do not collide. 
PTF122 and PTF618 do collide, but if you put PTF122 on first, 
you should be O.K.


4. Installation Instructions

Enter:

     # pkgadd -d diskette1

(replace diskette1 with the appropriate device name) to install the fix.

After this package is added the system is to be rebooted to include the new
driver in the system kernel.

The old driver will be saved in the directory
/var/sadm/pkg/ptf618/etc/conf/pack.d/asyc.

If you wish to restore the system (i.e. un-install this fix) and the package
can not be removed using pkgrm for some reason:

Please do the following:

Copy Driver.o from the above specified directory to /etc/conf/pack.d/asyc. 
Remove the directory "/var/sadm/pkg/ptf618".  Rebuilt the kernel (with
idbuild) and reboot the system.