[Mesa-dev] [Bug 27827] New: commit 745c4b568573fd5353e0f790251af64098742b1a causes problems and system lockups

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27827

           Summary: commit 745c4b568573fd5353e0f790251af64098742b1a causes
                    problems and system lockups
           Product: Mesa
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: yoshi314 at gmail.com


i've been testing ta3d game with radeon gallium driver (rv515 card) recently.
it uses a particular effect that looks like green spray in certain moments of
the game quite extensively ( 
http://www.youtube.com/watch?v=eh_APBlgH-E for reference )

mesa git master after mentioned commit causes various gpu stalls and sometimes
system lockups. 

basically when the effect appears, all rendering stops or drops to 1 frame per
few seconds. when the game stops rendering the effect, everything returns to
normal. the non-gfx related game and system activites still work normally (e.g.
network and sound playback)

reverting to one commit before fixes the problem.

dmesg output illustrating the problem (at the very end of the file) : 
http://pastebin.com/t6ZxL6fJ

after bisecting the offending commit is

745c4b568573fd5353e0f790251af64098742b1a 
"r300g: add generating texture coordinates for point sprites"

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