2010/2/7 Dave Airlie <airl...@linux.ie>: >> This would thus narrow my investigation path to the AGP code >> of the radeon driver, right? > > No it narrows it down the to the AGP hardware in your machine along with > the probable lack of info on it, and maybe some tweaks that we know > nothing about.
By AGP hardware, do you mean the chipset or the graphics adapter? I know nothing about driver development, but it seems to me that the zx1 chipset is fairly well documented (http://ftp.parisc-linux.org/docs/chips/zx1-ioa-mercury_ers.pdf). And from the copyright in drivers/char/agp/hp-agp.c, it seems to me that the zx1 driver was written by Bjorn Helgaas who works at hp. About the ATI FireGL X1 graphics adapter, since it's powered by an FGL 9700 GPU and people had to reverse-engineer this range of products, maybe are there "some tweaks we know nothing about", indeed ;-) > If it was as simple as a codepath in the radeon driver I think we'd have > fixed it by now. Would it be possible that something in the codepath in the radeon driver behaves differently/incorrectly on ia64 systems? As an example of "generic code" that nevertheless triggers a bad behaviour on ia64 systems (only?), patch "drm: Preserve SHMLBA bits in hash key for _DRM_SHM mappings" prevents DRI from being enabled (http://bugzilla.kernel.org/show_bug.cgi?id=15212). Back to the radeon driver, would it help if I can put my hand on an ATI Radeon 9700 graphics adapter? It was probably more widely used by gamers, and thus tested by the Linux community, than the CAD-oriented FireGL X1 one. Émeric ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
