I have already applied his patches on my PowerBook running Jessie to get accelerated graphics. However they are only a work around and not a real fix so they will be committed to mesa.
On Fri, Feb 5, 2016 at 8:44 AM, Mike <michael.hel...@gmail.com> wrote: > Herminio, > > Ok, take a look at this. > https://github.com/threader/mesa-11.1.1-ppc-r300-debian or if on stable > maybe this is more fitting > https://github.com/threader/mesa-10.6.3-ppc-r300-debian - this only fixes > the issue for r300 on powerpc though. > > On 5 February 2016 at 14:32, Herminio Hernandez Jr. < > herminio.hernande...@gmail.com> wrote: > >> I have been experiencing the same thing with my iBook and PowerBook. >> >> Sent from my iPhone >> >> On Feb 4, 2016, at 8:47 PM, Mike <michael.hel...@gmail.com> wrote: >> >> Hi. >> Managed to get the Radeon R300 running on mesa 11.1.1 with an old 2013 >> patch from Michel Dànzer, next problem is of course enabling agpmode, >> running with pci-mode with radeon.agpmode=-1 works, but is of course slow, >> and seems to load the cpu a lot. >> >> Upon initial investigation i could not initially believe agp could be >> this this broken for this long, until i found this. >> "committed with Ben Skeggs on Feb 26, 2013" >> >> https://github.com/DespairFactor/bullhead/commit/650e1203c11354ba84d69ba445abc0efcfe3890a >> >> http://lxr.free-electrons.com/source/drivers/gpu/drm/nouveau/nouveau_agp.c?v=4.2 >> #ifdef __powerpc__ >> /* Disable AGP by default on all PowerPC machines for >> * now -- At least some UniNorth-2 AGP bridges are >> * known to be broken: DMA from the host to the card >> * works just fine, but writeback from the card to the >> * host goes straight to memory untranslated bypassing >> * the GATT somehow, making them quite painful to deal >> * with... >> */ >> if (nouveau_agpmode == -1) >> return false; >> #endif >> >> and now later this: >> >> https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c >> #ifdef __powerpc__ >> /* Disable AGP by default on all PowerPC machines for now -- At >> * least some UniNorth-2 AGP bridges are known to be broken: >> * DMA from the host to the card works just fine, but writeback >> * from the card to the host goes straight to memory >> * untranslated bypassing that GATT somehow, making them quite >> * painful to deal with... >> */ >> mode = 0; >> #endif >> >> All seems to point to serious issues had around the time of change to ums >> to kms and a serious regression hitting the linux kernel? No? >> >> Cheers >> -Mike >> >> _______________________________________________ >> Linuxppc-dev mailing list >> Linuxppc-dev@lists.ozlabs.org >> https://lists.ozlabs.org/listinfo/linuxppc-dev >> >> >
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