Thread View: gnu.epoch.misc
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Started by Craig Dunwoody
Thu, 09 Apr 1992 20:31
epoch 4.0.1 display corruption (Very Bad Thing)
Author: Craig Dunwoody
Date: Thu, 09 Apr 1992 20:31
Date: Thu, 09 Apr 1992 20:31
40 lines
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2184 bytes
I just loaded epoch 4.0.1 (which as I understand it is the latest, official-release version) on my Silicon Graphics 4D/70GT running IRIX 4.0.1. I've been seeing display corruption problems. When I visit a file, move the cursor down a few lines, and insert a character, a character after the insertion point will disappear. At this point, merely moving the cursor back and forth along the line will cause characters in the line to appear and disappear. This is Very Bad -- I've never seen anything like this with epoch before. M-x recenter restores the display to correctness, so the problem is not with the underlying text data structure. I don't think it's a font problem either (I'm using *sony*120*, which is a normal-sized, fixed-width font); epoch doesn't seem confused about where the character boundaries are. The annoying thing is, it's not repeatable. The corruption only happens "some of the time". Perhaps it's some internal buffer-boundary condition? Doing heavy editing, I'll typically see corruption about ten times a day. This appears to be a regression from epoch 4.0 beta (b3?), which I built and ran previously with the exact same hardware, compiler, OS version, X server, .emacs file, screen layout, etc. (I always use exactly two 80x62 epoch windows, side by side). I never saw any display corruption with 4.0 beta or earlier. Either this is an SGI compiler, OS, or X bug that is being triggered by something that changed from epoch 4.0b3 to epoch 4.0.1, or it is a regression in epoch itself. If anyone else has seen this problem on SGI or other platforms, I'd appreciate hearing from you. Craig Dunwoody dunwoody@sgi.com (415) 962-3635 -- Craig Dunwoody dunwoody@sgi.com (415) 962-3635
Re: epoch 4.0.1 display corruption (Very Bad Thing)
Author: Gordon Joly
Date: Fri, 10 Apr 1992 10:46
Date: Fri, 10 Apr 1992 10:46
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>> -- using template mhl.format --
>> Date: Thu, 09 Apr 92 20:31:37 GMT
>> To: epoch@edu.uiuc.cs
>>
>> From: dunwoody@r2d2.gnu (Craig Dunwoody)
>> Subject: epoch 4.0.1 display corruption (Very Bad Thing)
>>
>> Return-Path: <epoch-m@edu.uiuc.cs>
>> Organization: Silicon Graphics, Inc.
>> Sender: epoch-request@edu.uiuc.cs
>>
>>
>> I just loaded epoch 4.0.1 (which as I understand it is the latest,
>> official-release version) on my Silicon Graphics 4D/70GT running IRIX 4.0.1.
>>
>> I've been seeing display corruption problems. When I visit a file,
>> move the cursor down a few lines, and insert a character, a character
>> after the insertion point will disappear. At this point, merely
>> moving the cursor back and forth along the line will cause characters in the
>> line to appear and disappear. This is Very Bad -- I've never seen anything
>> like this with epoch before.
>>
>> M-x recenter restores the display to correctness, so the problem is not with
>> the underlying text data structure. I don't think it's a font problem either
>> (I'm using *sony*120*, which is a normal-sized, fixed-width font); epoch
>> doesn't seem confused about where the character boundaries are.
>>
[...]
>>
>> Craig Dunwoody
>> dunwoody@sgi.com
>> (415) 962-3635
I have seen this a lot on a SUN4 with SunOS 4.1.1 on **EPOCH** **3.2**.
It seems to associated with buffer insertion and perhaps with mh-e.el?
It is very hard to duplicate.
Gordon,
____
Gordon Joly +44 71 387 7050 ext 3703
Internet: G.Joly@cs.ucl.ac.uk UUCP: ...!{uunet,uknet}!ucl-cs!G.Joly
Computer Science, University College London, Gower Street, LONDON WC1E 6BT
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