System Environment: -------------------------- Host: x-g45b Arch: x86_64 Platform: G45 Libdrm: (master)3d4bfe8c893d016ef43d1ebf28e4607aa1f540a4 Mesa: (mesa_7_5_branch)fb64365642be82ac0dc0d43452afc4650d309b53 Xserver: (server-1.6-branch)6be19e8f43086fb4b7fb30a47b89b5f3eed798ef Xf86_video_intel: (master)cdbf84f20295c8a78624318aa6fdfff3f5c8ce27 Kernel: (for-linus)0e7ddf7eeeef5aea85412120539ab5369577faeb Bug detailed description: -------------------------- It is a regression on server-1.6-branch of Xserver. oglc cases blendfunc.c/blend-constcolor.c fail due to Ian's commit as below: d7277296ed7aea7bd41b3489d4ceef750d400206 is first bad commit commit d7277296ed7aea7bd41b3489d4ceef750d400206 Author: Ian Romanick <ian.d.romanick@intel.com> Date: Thu Apr 9 14:38:24 2009 -0700 DRI2: Synchronize the contents of the real and fake front-buffers Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> (cherry picked from commit 567cf67959b30432ae30f4851ec17b3a375ab838) Reproduce Steps: ---------------------------------- 1.xinit& 2. run oglc case
this issue also happens with xserver master. commit 567cf67959b30432ae30f4851ec17b3a375ab838 Author: Ian Romanick <ian.d.romanick@intel.com> Date: Thu Apr 9 14:38:24 2009 -0700 DRI2: Synchronize the contents of the real and fake front-buffers Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
It looks like all the single buffered visuals that have a depth buffer fail, but all of the other visuals, even other single buffered visuals, pass.
This should be fixed by this commit: commit 2d86503471cb8691ce266342810237fc1b15a7b2 Author: Ian Romanick <ian.d.romanick@intel.com> Date: Fri Jun 26 13:30:16 2009 -0700 intel / DRI2: Additional flush of fake front-buffer to real front-buffer To maintain correctness, the server will copy the real front-buffer to a newly allocated fake front-buffer in DRI2GetBuffersWithFormat. However, if the DRI2GetBuffersWithFormat is triggered by glViewport, this will copy stale data into the new buffer. Fix this by flushing the current fake front-buffer to the real front-buffer in intel_viewport. Fixes bug #22288.
verified with below commits: Libdrm: (master)790097c51330090b2b7b90429b9ab8ddf259fd8e Mesa: (mesa_7_5_branch)418987ff05f892d3c33ed4ddbe856c496b05ea14 Xserver: (server-1.6-branch)dbac41b624e4aa86a6a184b7ebb52bfdd367bbf0 Xf86_video_intel: (master)f0270bbb47baed78a0ff6189ae20d3ac322ec02b
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