Date: Thu, 8 Nov 2001 23:48:13 +1000 From: "Gerard Eviston" <geviston@bigpond.net.au> To: "Pete French" <pfrench@firstcallgroup.co.uk> Cc: <stable@freebsd.org> Subject: Re: Curious crash Message-ID: <003101c1685c$10ef6950$ca0010ac@brutus> References: <E161oml-0003lf-00@mailhost.firstcallgroup.co.uk>
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> > Aha, I've experienced it on a Matrox Millenium. > > I just heard from someone who has seen it under windows too - though it was > fixed by a driver update. I have been uusing these cards under OpenStep > for years thoygh, and have never come across this before. > Some well documented problems exist with some Matrox models, and I have personally seen problems which match the "SEEPROM leakage" description given by HP. http://forums.itrc.hp.com/cm/QuestionAnswer/1,11866,0x4a805220af9bd5118ff100 90279cd0f9,00.html Your vertical stripes problem seems quite different (see below) > > Was VESA support compiled into the kernel? I've written a screensaver > > module which crashes on the Matrox Millenium when I try and run in > > 800x600x8, I wonder if there's something odd with the Millenium > > VESA support? > VESA might be the right tree to be barking up according to http://www.seul.org/archives/independence-l/Aug-1999/msg00178.html which describes a problem with banked VGA write combining: "With a 2MB Millennium there were problems with BVWC -- most hires VESA modes would result in vertical stripes over the entire screen. This appears to be either a hardware or software bug on the part of Matrox. I found a workaround which eliminates the stripes but you don't get the full speed enhancement from the BVGA" > No, VESA support wasnt compiled in. It seems that these cards are very > sensetive to their device drivers - so maybe FreeBSD is doing something > valid-but-unusual which tickles a bug in it that doesnt get hit by other > operating systems ? > > Its frustrating that its so hard to reproduce too as it makes the chances of > fixng it very slim indeed. Sigh. > > -pcf. > Hope this helps, Gerard Eviston > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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