I don't know what's involved in making the DRI work on multiple physical graphics cards, but if you want HW accelerated 3D on a dualheaded radeon card check out my mergedfb patch:
http://bugs.xfree86.org//cgi-bin/bugzilla/show_bug.cgi?id=276 I'm not sure you'll be able to get dual independant 3D accelerated heads from a dualheaded card since there is only one 3D engine. I don't know if it could be made to work with things like different color depths. Then there is the issue of 2 heads fighting for the same graphics engine. there would have to be some sort of coordination. perhaps you could somehow make the second head a 3D client of the first? I could be wrong though; I'm still learning the 3D side of things. Actually htinking about it more, you could take the mergedfb code and rearrange it a bit to give the impression of being two separate independant heads, but actually sharing a framebuffer on the backend. just divide the big frambeuffer into two "virtual" framebuffers that corresponded to each "independant" head. I think both heads would have to be the same color depth. Alex --- "Andreakis, Dean (MED)" <[EMAIL PROTECTED]> wrote: > I would like to help enable DRI for multiple head configurations but > I > need a little direction to get started. I understand from previous > postings and comments I have seen in the source that DRI is currently > disabled in multiple head cfg's because of "sync. problems" but I am > not > sure of the exact technical meaning of this. > > My development platform is an iBook w/ an ATI Radeon Mobility 7500, > Debian (sid)(2.4.19 kernel), XFree86 v4.3.0 and Michael Danzer's DRI > trunk. I did some initial work on the 2D radeon driver to enable dual > independent heads and this works ok for now. I then backed-off to > just > the internal panel and using Michael's DRI trunk got DRI enabled. Now > I > would like to take the last step and get DRI going w/ this dual > independent head configuration. > > I am not sure what modules to start looking at for this effort...i.e. > are the changes required in the XFree86 3D drivers in > xc/lib/GL/mesa/src/drv/radeon/ and/or in the kernel-mode drm modules > in > xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/. Also, > some > direction from a design standpoint and hints/tips on where to look > would > be useful. > > -dean andreakis > __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com ------------------------------------------------------- This SF.Net email is sponsored by: INetU Attention Web Developers & Consultants: Become An INetU Hosting Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission! INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
