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...reen capture, so I'm afraid we're stuck with my hand-wavy description. Long ago, this used to just work, so I've bisected to find which commits broke things, and found that these related commits appear to be the culprit: 77bce8e drm/nouveau: fix for ttm interface changes, and ad49f50 drm/ttm/radeon: add dma32 support. I've found that commenting out the bit of ttm_tt_alloc page which adds __GFP_DMA32 to the alloc_page flags fixes this issue, as does forcing the last argument of ttm_bo_device_init() to false in nouveau_mem_init(). This, of course, makes no sense -- the DMA...

http://bugs.freedesktop.org/show_bug.cgi?id=26193 Summary: nouveau falls back to NoAccel on 9400M Product: xorg Version: git Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Driver/nouveau AssignedTo: nouveau at lists.freedesktop.org ReportedBy: bjt23