Date: Fri, 15 May 1998 10:56:50 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: dyson@FreeBSD.ORG Cc: sos@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: People having problems with X windows? Message-ID: <2028.895222610@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 15 May 1998 02:38:54 CDT." <199805150738.CAA03075@dyson.iquest.net>
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In message <199805150738.CAA03075@dyson.iquest.net>, "John S. Dyson" writes: >I just removed my WC "improvements", by adding the return to the >subroutine in the pmap code. See if it is more friendly. The >symptoms appear to be those associated with improper setting of >WC mode for a display adaptor. I had to add a heuristic to make >it work correctly on one of my cards, but I guess it was bad. > >The code is still in there, but I guess there is the need for more >research into the issue. I would expect WC to break any and all accelerated adapters that communicate with the graphics engine through the ram window... What is needed is to XFree86 to be able to madvise the true frame buffer as "Write-combine" and leave the rest of the ram window unaffected. -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." "ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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