LES@vaxi.UWO.CDN (01/12/88)
Recently we installed (not upgraded to) VAX/VMS V4.6 on our MicroVAXII. All seemed well EXCEPT that whenever we entered a DCL command which caused output to be generated (e.g. SHOW SYS, SHOW USER, DIR, etc.) AND typed a control character such as CTRL/C, CTRL/Y, CTRL/O, THE TERMINAL LINE HUNG UP. Examining the UCB for the hung terminal from another port would show (using SDA) a rapidly increasing error count on the terminal and the TIMOUT bit in the device status word was being set (indicating a device timeout). We use modem control on all of our lines since we go through a Gandalf PACX switch. Dropping the connection and re-establishing it would clear the problem until the next control character was typed while output was occuring. Note that when the control character was typed, NOTHING, not even echo of the control character would be received. The MicroVAXII uses DHV11's. Since the problem seemed related to the terminal driver, I replaced TTDRIVER and YFDRIVER with the VAX/VMS V4.4 version. Doing so fixed the problem! Has anyone else experienced a similar problem or does anyone have a solution. Is this related to the DHU11 problem fixed with VMS 4.7? Les Flodrowski Social Science Computing Laboratory University of Western Ontario BITNET: LES@UWOVAX
nagy%warner.hepnet@LBL.GOV (Frank J. Nagy, VAX Wizard & Guru) (01/12/88)
> ... > All seemed well EXCEPT that whenever we entered a DCL command which caused > output to be generated (e.g. SHOW SYS, SHOW USER, DIR, etc.) AND typed a > control character such as CTRL/C, CTRL/Y, CTRL/O, THE TERMINAL LINE HUNG > UP. ... > The MicroVAXII uses DHV11's. > > Since the problem seemed related to the terminal driver, I replaced TTDRIVER >and YFDRIVER with the VAX/VMS V4.4 version. Doing so fixed the problem! > > Has anyone else experienced a similar problem or does anyone have a solution. > Is this related to the DHU11 problem fixed with VMS 4.7? Yes, this problem with the DHV11s in VMS V4.6 is/was a known problem. Your workaround was the correct fix. This is claimed to be fixed in VMS V4.7 (hearsay only, we haven't yet received our V4.7 kits). VMS V4.7 is shipping now; some sites have received it. = Frank J. Nagy "VAX Guru & Wizard" = Fermilab Research Division EED/Controls = HEPNET: WARNER::NAGY (43198::NAGY) or FNAL::NAGY (43009::NAGY) = BitNet: NAGY@FNAL = USnail: Fermilab POB 500 MS/220 Batavia, IL 60510