Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!vitsun.UUCP!pat
From: pat@vitsun.UUCP (Patrick Turley)
Newsgroups: comp.windows.news
Subject: Broken display lock
Message-ID: <8808022253.AA13019@vitsun.com>
Date: 3 Aug 88 03:08:17 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 28

In article <2126@ssc-vax.UUCP> dmg@ssc-vax.UUCP (David Geary) writes:
>"Window display lock broken because process xxxx blocked"

In SunView, processes obtain locks from the windowing system before they
write to the screen. These locks time out after 1 second of virtual process
time (I think that's right - check the SunView manual if the precise number
interests you). If the lock is broken, that is the message you get. I don't
have NeWS here so I don't know a lot about it but it seems logical to infer
from what I've heard that it is going through the usual SunView arbitration
mechanisms (NeWS will run in a SunView window, won't it?) but taking too
long on something. I was once interested in increasing the timeout value
and called up Sun software support to find out if it was a system parameter
that I could fiddle with in some configuration file or something. It turns
out that it doesn't appear in a any configuration file but you can
increase it by poking a particular location in the kernel. Of course, that
means the new value is only good until the system goes down. Perhaps this
could be automated by feeding adb's stdin with a script in rc.local.


                                Pat

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