Xorg support for adding a graphics card

doug at safeport.com doug at safeport.com
Fri Nov 12 17:02:43 UTC 2010

On Fri, 12 Nov 2010, Fbsd8 wrote:

> doug wrote:
>> On Mon, 8 Nov 2010, doug wrote:
>>> On Mon, 8 Nov 2010, Jerry wrote:
>>>> On Mon, 8 Nov 2010 17:08:23 -0500 (EST)
>>>> doug at safeport.com <doug at safeport.com> articulated:
>>>>> When I slid froward from FreeBSD 7.2 and Xorg (whatever) to 8.0 and
>>>>> xorg-7.4_4 I lost the ability to use the graphics card I had added to
>>>>> my Dell PE300 built in the last century. I was told the ability to
>>>>> have two cards in one box was lost due to int10 provided by
>>>>> libpciaccess.
>>>>> Is this still the case? The BIOS on the PE300 does not allow the
>>>>> on-board card to 'disappear'. I can not find any information to
>>>>> suggest things have changed.
>>>> Isn't there a jumper on the motherboard that can be used to disable
>>>> the on board card? Not all motherboards had one but it is worth a check
>>>> anyway, assuming you have not done so all ready.
>>> I was not aware of the possibility - thanks
>> The PE300 has no documented jumpers on the mother board effecting the VGA. 
>> Am I correct in my understanding that this is a FreeBSD issue that makes 
>> Xorg a 'victim'?
>> _______________________________________________
> Check the motherboard bios setup to disable the on motherboard vga port.

Thanks. The [latest] BIOS has one VGA option:

    Video DAC Snoop Controls how VGA and graphics devices on the PCI or AGP
    bus respond to palette register accesses.

     * On  - forces VGA and graphics devices to snoop VGA palette register
             accesses and forward them to the ISA bus.
     * Off - (the default) forces VGA and graphics devices to respond
             positively to palette register accesses.

There is no hardware relief for the Dell PE300 that does not involve 
modifying the mother, assuming that is possible.

I have [mostly] covered the fact that I have 1152x864 as the screen 
resolution by making things smaller in KDE and setting fonts in xterm. This 
system was made less useful by upgrading to FreeBSD 8. I am trying to find 
out if support for multiple VGA cards is in the works and what needs to 
change for that to happen.

Douglas Denault
doug at safeport.com
Voice: 301-217-9220
   Fax: 301-217-9277

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