sitongia@hao.ucar.edu (Leonard Sitongia) (02/08/89)
System: Sun-4/280S OS: 4.0.1+patches We have a terminal port selector connected to our ALMs. The port selector wants to see DTR (Data Terminal Ready) drop for a moment when logout occurs, then when DTR is restored it will make the port available again. I have seen ocassions in which a user logs out, DTR drops and it never comes back. Also, I have an idle-terminal killer will drops DTR, sleeps, and tries to raise DTR, which usually works, but sometimes cannot raise DTR. Is it the ALMs responsibility to restore DTR, or does the port selector have to do something to the ALM before the ALM will restore DTR? Of course, most times DTR does get restored. More information, for lines which have DTR off: 1) these lines do not have soft carrier enabled in the kernel configuration. 2) syslog reports I/O error from getty periodically (every 10 minutes?). 3) I cannot open the line to do an ioctl to raise DTR (I/O error). We've installed 4.0.1 and the patch tape "YAPT 5th edition". In the bug list 1008825 says that DTR on modem lines is asserted while port is not open. How do I get DTR back up, short of rebooting? Im in a catch-22 because I cant open the line with DTR down and cant raise DTR without openning the line. Is there an alternative (of course I've tried killing getty on the line and doing the old off/on-in-/etc/ttytab-"kill -1 1")? Thank you for your time, -Leonard E. Sitongia System Programmer (303) 497-1509 USPS Mail: High Altitude Observatory P.O. Box 3000 Boulder CO 80307 Internet: sitongia@hao.ucar.edu SPAN: NSFGW::"hao.ucar.edu!sitongia" [NSFGW=9580]