Bug 64151

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)

Description of problem:
Using hyperterm to connect to Linux box with 56K internal modem & mgetty 
configured for ttyS4, abruptly disconnect the connection in the middle of a 
task (ala cat a file or ls a directory) without logging out completely.  The 
mgetty dies (no longer shows up on ps) but the ttyS4 lock file remains.  The 
mgetty will never respawn, however, and subsequent attempts to dial into the 
box will never be answered.

Version-Release number of selected component (if applicable):


How reproducible:
Always / Sometimes

Steps to Reproduce:
1.spawn mgetty for internal modem
2.dial into box using hyperterm or other equivalent
3.run "cat" on a file or "ls" in a directory
4.abruptly disconnect the connection without logging out
5.redial box, phone line rings, no answer by mgetty
6.run ps on box, see that mgetty has not been respawned
7.check /var/lock dir & see that ttyS4 lock file is still present

Actual Results:  modem placed into state where mgetty is never respawned and 
will not answer line (even if lock file is removed).

Expected Results:  modem cd loss would disable mgetty, cause lock file to be 
removed, and mgetty respawned & answer subsequent calls to box when ringing.

Additional info:

One factor may involve phone line quality or modem / RS-232 signal detection re 
CD + DTR?  This problem has not been duplicated using a Black Box phone 
simulator but very easily using other combinations of modems & phone lines.