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Date:      Fri, 26 Feb 1999 08:20:59 -0800 (PST)
From:      omega@asdf.org
To:        freebsd-gnats-submit@freebsd.org
Subject:   kern/10280: Display Adapters (PCI) probed wrong way - Xservers fail to see display memory
Message-ID:  <19990226162059.84A6F14FD6@hub.freebsd.org>

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>Number:         10280
>Category:       kern
>Synopsis:       Display Adapters (PCI) probed wrong way - Xservers fail to see display memory
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Feb 26 10:10:07 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Osku Sneits
>Release:        3.0-REL, 3.1-REL
>Organization:
Solid Information Technology
>Environment:
FreeBSD he.asdf.org 3.1-RELEASE FreeBSD 3.1-RELEASE #1: Fti Feb 26 17:05:21 EET 1999
root@he.asdf.org:/usr/src/sys/compile/FILTHY  i386
>Description:
My envinroment: Pentium II, Soyo D6IBA motherboard, 2 of 128M SDRAM DIMMs,
2940UW plus SCSI disk, two Millennium Matrox display adapters (one primary,
one DIPped to non-VGA)

Before:
I had a common Pentium motherboard with a 166MMX cpu and both common
XFree86 X-server SVGA (with primary) and MetroX (multi-headed with both
adapters) worked fine.

Now:
I upgraded to Soyo D6IBA motherboard (Bios 1.4, latest) with BX chipset
and somehow the display adapters are mis-configured badly. I believe
that the primary adapter's display memory is not seen at all.
Both XFree and MetroX servers report 0 kilobytes of display memory
and trying to "fix" it by manually telling the amount of memory does
the same as with the probed 0k: servers hang the system.
This might be a problem with BX chipset and probing of the PCI cards
incorrectly. This with 3.0-REL
With 3.1-REL, even the standard atk* console fails, after kernel is loaded
absolutely nothing comes to either of the displays and keyboard is hung.

This is a bit annoying as all this worked before, plus win NT 4.0 still
works fine both with one display card only AND multi-headed with both
cards.

I even tried to upgrade Matrox BIOSes to the latest (3.0) which did not
change anything.

I even tried with MSI motherboard, Model MS-6120 and the symptoms were
the same.

I will try with other Soyo BX motherboards next week.

>How-To-Repeat:
Try BX equipped PII motherboard and two Matrox Milleniums (PCI).
Try MetroX or the standard XFree86 server with the both cards, alter
"VGA enable" DIP between those two.


>Fix:
None known, unfortunately.

>Release-Note:
>Audit-Trail:
>Unformatted:


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