Re: ports/116851: x11-drivers/xf86-video-mga - Xorg 7.3 mga driver fails to read video BIOS (G450 du

The following reply was made to PR ports/116851; it has been
noted by GNATS.

From: Warren Block <wblockwonkity.com>
To: bug-followupFreeBSD.org, wblockwonkity.com
Cc:  
Subject: Re: ports/116851: x11-drivers/xf86-video-mga - Xorg
7.3 mga driver
 fails to read video BIOS (G450 dual-VGA)
Date: Sat, 20 Oct 2007 21:40:09 -0600 (MDT)

 When the FreeBSD port of xorg-server starts using
libpciaccess, the 
 problem reading the video BIOS ROM should be fixed.  Until
then, I have 
 an easier patch and instructions for xorg-server 1.4.1:
 
 http://www.wonkity.com/~wblock/mgapatch/xorg-patch.txt

 
 -Warren Block * Rapid City, South Dakota USA
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Warren Block wrote:
> Subject: Re: ports/116851: x11-drivers/xf86-video-mga -
Xorg 7.3 mga driver
>  fails to read video BIOS (G450 dual-VGA)
> Date: Sat, 20 Oct 2007 21:40:09 -0600 (MDT)
> 
>  When the FreeBSD port of xorg-server starts using
libpciaccess, the 
>  problem reading the video BIOS ROM should be fixed. 
Until then, I have 
>  an easier patch and instructions for xorg-server
1.4.1:
>  
>  http://www.wonkity.com/~wblock/mgapatch/xorg-patch.txt

>  
Just to inform you: the patch does what it's supposed to
do with my G550 AGP card, the BIOS gets loaded. I don't
use a dual head configuration, so I can't say anything
about that.

The patch doesn't help with the problem I've tried it for;
version 1.9.100 of the mga driver is not willing to give
me a modeline for a 1600x1200 screen. I hoped it would
be a video bios issue, but apparently it's something else.

Anyway, thanks for your investigations,
  Rainer
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> Date: Sun, 21 Oct 2007 14:00:03 GMT
> From: Warren Block <wblockwonkity.com>
> 
>  When the FreeBSD port of xorg-server starts using
libpciaccess, the 
>  problem reading the video BIOS ROM should be fixed. 
Until then, I have 
>  an easier patch and instructions for xorg-server
1.4.1:
>  
>  http://www.wonkity.com/~wblock/mgapatch/xorg-patch.txt

>  
>  -Warren Block * Rapid City, South Dakota USA

Warren,

I installed your patch and I no longer get errors in the
Xorg.0.log
file, but I still have problems.

I now have two displays, but the right display only runs at
1024x768
with the left runs at 1280x1024. 

If I try swapping the "Position" lines between
monitor 0 and 1, I go
back to the old mirror effect, with the right screen still
at 1024x768.

I get the following messages on my vty:
WB: Reading 128K from /dev/mem address 0xc0000
info: [drm] Initialized card for AGP DMA
drm0: [ITHREAD]
[config/hal] couldn't initialise context: (null) ((null))
SESSION_MANAGER=local/pak.es.net:/tmp/.ICE-unix/98465

The only warning in the log is:
(WW) OS did not count PCI devices, guessing wildly
(WW) MGA(0): Option "Position" is not used
I don't like the look of the latter error.

Any ideas? I did edit the "Monitor" sections and
tried both with
explicit sync rates and commenting them out and using DCC.
Made no
difference. I must admit that I am baffled.

Also, is xinerama no longer usable with the 7.3 and the
G450? Or so you
just prefer randr? (I can see that randr has advantages.)
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley
Lab)
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