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From: keith@expo.lcs.mit.EDU (Keith Packard)
Newsgroups: comp.windows.x
Subject: Re: dual framebuffers and cursur troubles on the DS5000
Message-ID: <9104051638.AA03450@xenon.lcs.mit.edu>
Date: 5 Apr 91 16:38:06 GMT
References: <1991Apr4.172029@hoboken.bellcore.com>
Sender: daemon@athena.mit.edu (Mr Background)
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> Has anyone managed to get a DEC5000 running with two color framebuffers?

But, the kernel device driver which (at least) MIT X uses only supports
a single frame buffer.  Additionally, the old driver also messes up the
cursor occasionally due to (according to friends at DEC) a bug in the Bt459
RAMDAC.

Ultrix 4.2 includes a completely new frame buffer interface which supports
multiple screens as well as working around the RAMDAC bug to make the
cursor stable.  R5 will include support for this new driver, and I can
say from personal experience that it is very nice (DISPLAY=:0.1 right now).

Keith Packard
MIT X Consortium