xsrc/40310: Problem with SiS Driver for Older SiS Card

[graham%vpac.org@localhost]

>Number:         40310
>Category:       xsrc
>Synopsis:       Problem with SiS Driver for Older SiS Card
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 01 03:10:00 +0000 2009
>Originator:     Graham Jenkins
>Release:        50_BETA
>Organization:
Victorian Partnership for Advanced Computing
>Environment:
NetBSD bluetongue.jenkins.org 5.0_BETA NetBSD 5.0_BETA (GENERIC) #0: Mon Dec 29 
20:48:35 UTC 2008  
builds%b0.netbsd.org@localhost:/home/builds/ab/netbsd-5/i386/200812290000Z-obj/home/builds/ab/netbsd-5/src/sys/arch/i386/compile/GENERIC
 i386
>Description:
Xorg aborts with message:
 ...
(--) Chipset SIS6326/AGP/DVD found
(II) SIS(0): SiS driver (2005/09/20-1, compiled for X.org 1.4.2.0)
(II) SIS(0): Copyright (C) 2001-2005 Thomas Winischhofer 
<thomas%winischhofer.net@localhost> and others
(II) SIS(0): *** See http://www.winischhofer.at/linuxsisvga.shtml
(II) SIS(0): *** for documentation and updates.
(--) SIS(0): Chipset is SiS6326 AGP (H0) (revision 0x0b)
(--) SIS(0): Relocated I/O registers at 0xD000
(WW) SIS(0): remove MTRR a0000 - b0000
(==) SIS(0): Depth 24, (==) framebuffer bpp 32
(EE) SIS(0): **************************************************
(EE) SIS(0):                       ERROR:
(EE) SIS(0): Framebuffer bpp 32 not supported for this chipset
(EE) SIS(0):                   END OF MESSAGE
(EE) SIS(0): **************************************************
(II) UnloadModule: "sis"


Note: Google search also reveals that this problem was found (and addressed) in 
some recent Debian Releases.
>How-To-Repeat:
1) Use X -configure .. to create an  xorg.conf file

2) X -ac -broadcast -once 
>Fix:
Change Driver to "vesa".

This probably prevents the machine from using the full potential of the SiS 
chip :(