Bug 9232

Summary:	crash when AGPFastWrite is true
Product:	DRI	Reporter:	Jacek Poplawski <jacekpoplawski>
Component:	General	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED INVALID	QA Contact:
Severity:	normal
Priority:	high
Version:	DRI git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Jacek Poplawski 2006-12-03 15:02:40 UTC

When option "AGPFastWrite" is set to "true" - X crashes just after "startx".

Option "AGPMode" can be set to "1", "2" or "4" and it works stable. When it it
set to "8" - glxgears crashes system.

My card is Radeon 9800 Pro:

(--) PCI:*(1:0:0) ATI Technologies Inc Radeon R350 [Radeon 9800 Pro] rev 0, Mem 
@ 0xe8000000/27, 0xfbe00000/16, I/O @ 0xe000/8, BIOS @ 0xfbd00000/17
(--) PCI: (1:0:1) ATI Technologies Inc Radeon R350 [Radeon 9800 Pro] (Secondary)
 rev 0, Mem @ 0xf0000000/27, 0xfbf00000/16
(...)
(--) Chipset ATI Radeon 9800PRO NH (AGP) found
(...)
(--) RADEON(0): Chipset: "ATI Radeon 9800PRO NH (AGP)" (ChipID = 0x4e48)

OpenGL renderer string: Mesa DRI R300 20060815 AGP 4x x86/MMX+/3DNow!+/SSE2 TCL
OpenGL version string: 1.3 Mesa 6.5.2

My motherboard is Asus K8V-X SE, CPU is Athlon 64 3000+, kernel 2.6.18.4.

Comment 1 Daniel Stone 2006-12-03 15:22:11 UTC

yes, it does.

(that's why it's not enabled by default.)

Comment 2 Roland Scheidegger 2006-12-03 15:39:59 UTC

There is already a bug for fast writes, #6001. It never works (with radeons at
least), and noone really knows why. As for AGP8x, should work. However, since it
seems to almost work for you and only crashes when starting a 3d app (so
potentially lots of agp traffic happens), sounds like a hw issue to me. It is
possible the windows driver hacks this up with changing agp drive strength and
other nasty settings (if you tried it there and it worked).

Comment 3 Sacha 2006-12-04 06:49:14 UTC

I have the same Motherboard, CPU and a Radeon 9600 card. I also get crash with 
Fast Write on.

It crashes when using Windows as well. I believe this is a known issue with 
motherboard too.

Comment 4 Jacek Poplawski 2007-02-19 06:36:06 UTC

I found information about AGP problem on this board here:

http://ubuntuforums.org/showthread.php?t=302902

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