Bug 27300

Summary:	[r300g] Oolite fragment shaders are too big for r3xx
Product:	Mesa	Reporter:	Darren Salt <bugspam>
Component:	Other	Assignee:	mesa-dev
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	Shader log from Oolite

Description Darren Salt 2010-03-24 19:21:37 UTC

Hit while trying out the r300g driver by playing Oolite (svn HEAD, no OXPs needed, but shaders turned up to full).

Setup: Debian testing/unstable, with bits from experimental.
  xserver-xorg-core 1.7.5
  xserver-xorg-video-radeon 6.12.192-1
  libdrm 2.4.19 (local build, with packaging adapted from 2.4.18-4)
  mesa git 2ad8692a (local build, with packaging adapted from 7.7-4)

Oolite: svn://svn.berlios.de/oolite-linux/trunk

Comment 1 Corbin Simpson 2010-03-26 04:33:35 UTC

Reverting cba6430524198a1bdcdeada03cbe946a454f3935 stops the hardlock, but now there's a failing vertex shader. Looking into it now.

Comment 2 Corbin Simpson 2010-03-26 04:57:09 UTC

Tired, commented on wrong bug. Investigating yours now.

Comment 3 Corbin Simpson 2010-03-26 05:40:07 UTC

Can't figure out how to build your program. :T

You hit the generic "error in shader compiler" assert. Could you run again with RADEON_DEBUG=fp set, and attach that log here?

Comment 4 Darren Salt 2010-03-26 08:21:21 UTC

Created attachment 34486 [details]
Shader log from Oolite

One log file, as requested. (This is with shader-effects-level set to 3.)

Comment 5 Darren Salt 2010-03-26 08:31:41 UTC

About compiling Oolite: "make -f Makefile pkg-deb" works here. ("debuild binary" would be fine, but debian/changelog is generated.)

http://www.oolite.org/download has links to binaries.

Comment 6 Corbin Simpson 2010-03-27 14:08:20 UTC

I won't be able to reproduce exactly, without finding one of my older cards. Also oolite appears to refuse to enable fancy shaders. :T

Basically, the shader is too big for the hardware. There's no obvious optimizations to be done, but I bet I could find some, if the shader is known to work on fglrx.

I've pushed a patch to make it so that you get an error message instead of just an empty assertion.

Comment 7 Marek Olšák 2010-05-08 09:22:22 UTC

Closing because the game loads longer shaders than hardware can handle.

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