From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue,  4 Aug 1998 18:15:44 -0400
From: Erik Theisen etheisen@mindspring.com
Subject: [9fans] PC's 16MB SEGMAPSIZE limitations.
Topicbox-Message-UUID: 7c1e6890-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19980804221544.B8iW_2gHrorhKr6fcaEfUeTFlFUNGdUVz9zrYaIr0D0@z>

forsyth@caldo.demon.co.uk wrote:

> >>I tried bumping SEGMAPSIZE to 64 and the machine became unstable.
>
> that's enough for me on dozens of machines, with no instability.

Sorry,  spoke too soon.  The instability wasn't caused by SEGMAPSIZE.  I
guess I applied the updates too hastily. :)

Apparently there is some incompatibility between my #9 Motion 771 VLB
card and the 9/pc/vgargb524.c hardware cursor stuff. After commenting
out the hwgc entry in vgadb the problem went away.

Symptoms included black screens of death when resizing windows and/or
moving the mouse, sending the monitor into a out-of-sync tailspin,
hanging the machine, and  frying the local kfs file system.

The hung machine and tossed file system seem to be a fairly strange
effects for hwgc incompatibilities.  I wonder if there isn't a bad
pointer in the code somewhere.

Any thoughts on this?  Thanks.

Ciao,
Erik