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Community/Discussion/QNX4 Community Support (EOL)/Dual-head graphics/List of Posts
Forum Topic - Dual-head graphics: (5 Items)
   
Update
Thomas Haupt
02/17/2009 8:49 AM
post22339
Dual-head graphics   
Do we have graphics drivers that support dual-head graphics cards, e.g. like matroxg?

Thanks,
- Thomas
Michael Van Reenen
02/17/2009 8:55 AM
post22340
Re: Dual-head graphics   
The QNX4 graphics framework doesn't support multi-head cards.  The only way to get multi-display is to have multiple 
graphics cards.   The only drivers that are known to have worked in a multi-card setup with QNX4 Photon are Pg.rage128 
and Pg.radeon.
Thomas Haupt
02/17/2009 9:30 AM
post22343
RE: Dual-head graphics   
Hi Mike,

good to know, thanks. Is there a reason why other cards would not work
in a multi-card setup? (i.e., what is the reason?)

Thanks,
- Thomas

> -----Original Message-----
> From: Michael Van Reenen [mailto:community-noreply@qnx.com] 
> Sent: 17 February 2009 14:55
> To: qnx4-community
> Subject: Re: Dual-head graphics
> 
> The QNX4 graphics framework doesn't support multi-head cards. 
>  The only way to get multi-display is to have multiple 
> graphics cards.   The only drivers that are known to have 
> worked in a multi-card setup with QNX4 Photon are Pg.rage128 
> and Pg.radeon.
> 
> 
> 
> _______________________________________________
> QNX4 Community Support
> http://community.qnx.com/sf/go/post22340
> 
>
Michael Van Reenen
02/17/2009 9:35 AM
post22345
Re: RE: Dual-head graphics   
At power-on only the primary card gets initialized by the BIOS.

For a driver to work as a secondary device this extra initialization needs to be done in the driver.   Only Pg.rage128.
so and Pg.radeon have this capability.

There are a couple of reasons for this including specific requests for therse devices, availability of requried 
documentation and HW,  and generally multi-card has been a low-runner use case.
Thomas Haupt
02/17/2009 10:17 AM
post22350
RE: RE: Dual-head graphics   
Thanks, Mike. Good stuff.

- Thomas 

> -----Original Message-----
> From: Michael Van Reenen [mailto:community-noreply@qnx.com] 
> Sent: 17 February 2009 15:35
> To: qnx4-community
> Subject: Re: RE: Dual-head graphics
> 
> 
> At power-on only the primary card gets initialized by the BIOS.
> 
> For a driver to work as a secondary device this extra 
> initialization needs to be done in the driver.   Only 
> Pg.rage128.so and Pg.radeon have this capability.
> 
> There are a couple of reasons for this including specific 
> requests for therse devices, availability of requried 
> documentation and HW,  and generally multi-card has been a 
> low-runner use case.
> 
> 
> _______________________________________________
> QNX4 Community Support
> http://community.qnx.com/sf/go/post22345
> 
>

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