Re: unaligned access problem in XAA

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

On Monday 29 November 2010 22:58:59 Michael wrote:
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> Hello,
> 
> On Nov 29, 2010, at 8:04 AM, Nick Hudson wrote:
> > On Monday 29 November 2010 13:00:59 Michael wrote:
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> >> Hello,
> >>
> >> On Nov 29, 2010, at 3:30 AM, Nick Hudson wrote:
> >>> On Monday 29 November 2010 07:40:54 Nick Hudson wrote:
> >>>> Hi,
> >>>>
> >>>> I found an unaligned access that I've fixed with the attached
> >>>> patch.
> >>>> Anyone see any problems with it and/or test it on a big endian
> >>>> platform?
> >>>
> >>> Some helpful people (you know who you are) spotted some problems
> >>> with this
> >>> version.  Updated version attached.
> >>
> >> I'll give it a shot on sparc64 and friends.
> >> Since I didn't run into it myself, how do you trigger the problem?
> >
> > Start X without an xorg.conf on NetBSD/cats with an S3 :)
> 
> So the S3 driver defaults to 24bit packed pixels? That's weird, pretty
> much everything else defaults to 24bit in 32bit pixels. A bug in the
> S3 driver?

Here's an extract from my Xorg.0.log

 [  6373.054] (II) S3VIRGE(0): Creating default Display subsection in Screen 
section
        "Builtin Default s3virge Screen 0" for depth/fbbpp 24/24
[  6373.055] (==) S3VIRGE(0): Depth 24, (--) framebuffer bpp 24
[  6373.056] (==) S3VIRGE(0): RGB weight 888
[  6373.058] (==) S3VIRGE(0): Default visual is TrueColor
[  6373.060] (==) S3VIRGE(0): Using HW Cursor
[  6373.061] (==) S3VIRGE(0): mx_cr3a_fix.

> I'm not even sure I have hardware that supports 24bit packed without
> major contortions.

It works! *shrug*

> 
> have fun
> Michael

Nick