Comment 2 for bug 507148

dmesg shows:

[ 213.812640] [TTM] Failed moving buffer. Proposed placement 0x00060004
[ 213.812650] [TTM] Out of aperture space or DRM memory quota.
[ 213.812660] [drm:radeon_object_create] *ERROR* Failed to allocate TTM object (5914624, 0x00060004, 0)
[ 213.812667] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (5914624, 4, 4096)