On my Thinkpad X230 I get: [idr@mumford-wire piglit]$ bin/read-front -auto Mesa warning: couldn't open libtxc_dxtn.so, software DXTn compression/decompression unavailable Probe color at (0,0) Expected: 0.000000 0.000000 1.000000 Observed: 0.000000 0.000000 0.000000 Probe color at (0,75) Expected: 0.000000 1.000000 0.000000 Observed: 0.000000 0.000000 0.000000 PIGLIT: {'result': 'fail' } This bisected to: commit cde8bad1c9363ee293ae7844bcecb6179426ea65 Author: Kenneth Graunke <kenneth@whitecape.org> Date: Mon May 5 11:02:18 2014 -0700 i965: Always intel_prepare_render() after invalidating front buffers. Fixes glean/texture_srgb, which hit recursive-flush prevention assertions in vbo_exec_FlushVertices. This probably hurts the performance of front buffer rendering, but very few people in their right mind do front buffer rendering. Fixes Glean's texture_srgb test. Cc: "10.2" <mesa-stable@lists.freedesktop.org> Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Acked-by: Anuj Phogat <anuj.phogat@gmail.com> Reviewed-by: Eric Anholt <eric@anholt.net>
note: QA missed this regression due to bug#48077.
I can reproduce this issue with Ubuntu Mesa 10.1.3, however, it passes fine with current master (29c23644cc8cf). In my IVB system, with master: $ bin/read-front -auto PIGLIT: {"result": "pass" }
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