Bug 27827

Summary:	commit 745c4b568573fd5353e0f790251af64098742b1a causes problems and system lockups
Product:	Mesa	Reporter:	kowalski marcin <yoshi314>
Component:	Mesa core	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	dmesg ilustrating the errors

Description kowalski marcin 2010-04-24 13:35:45 UTC

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"

Comment 1 kowalski marcin 2010-04-26 11:45:00 UTC

Created attachment 35297 [details]
dmesg ilustrating the errors

since pastebin link seems to have expired, i'm attaching the dmesg output

Comment 2 Marek Olšák 2010-04-26 12:02:30 UTC

I've disabled point sprites in the driver until we know what's wrong.

Comment 3 kowalski marcin 2010-05-02 06:46:03 UTC

ok , today's commits fixed the problem. 

also, previously the sprites showed up as green squares, now they are round dots - i suppose this is the intended behaviour of the game.

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