On Mit, 2013-11-13 at 19:07 +0100, Jochen Rollwagen wrote: > I started investigating the problem because AGP mode used to work with > the UMS drivers (although I now understand they didn’t really use AGP > memory) They used AGP memory but didn't dynamically bind memory to the AGP aperture or unbind it from there. > and in the second patch I mentioned below Benjamin Herrenschmidt > stated that “there's a chip errata (for the pre-R600 chips). On those > chips, the aperture must be aligned to the aperture size (that is > FB_START in MC_FB_LOCATION must be aligned to the aperture size).” > Since that workaround/patch definitely isn’t in the current DRM code > any more (probably got lost in the transition to KMS) my idea was to > re-apply the three-line workaround/patch (which should be quite > trivial given the comment in radeon_vram_location in the drm kernel > code). So, have you verified that the aperture is not aligned to its size for you? If it's not, does aligning it help stability with AGP? -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
