Bug 28470

Summary:	Cannot set AGP rate - system unstable.
Product:	xorg	Reporter:	mike (a51473) <a51473>
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	blocker
Priority:	medium
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description mike (a51473@bofthew.com) 2010-06-09 12:36:35 UTC

I have gigabyte 7nf-rz motherboard. It is nforce2 based.
Problem is that chipset or particular board or bios or whatever... is unstable when AGP rate is set to x8.
During heavy use (3d or even flash/mplayer video play) it tends to lock system hard. So hard, that even played sound is looped inside soundcard buffers.
This problem is persistent over many windows xp installations, various linux distros, many nvidia blob drivers. My card is nv7600gs, but even amd radeon 9200 suffer same problem.

Solution is simple: set agp to x4 - problem solved 100%.
Nvidia blob allowed me to do it.

Now I'm using fedora13 with nouveau.
Is there any way to set agp rate to x4?

My setup:
xorg-x11-drv-nouveau-0.0.16-6.20100423git13c1043.fc13.i686
libdrm-2.4.20-1.fc13.i686
kernel-PAE-2.6.33.5-112.fc13.i686

Yes, this problem is a blocker for me to became nouveau user in long term.

Have nice day.

Comment 1 Francisco Jerez 2010-09-07 17:46:56 UTC

(In reply to comment #0)
> I have gigabyte 7nf-rz motherboard. It is nforce2 based.
> Problem is that chipset or particular board or bios or whatever... is unstable
> when AGP rate is set to x8.
> During heavy use (3d or even flash/mplayer video play) it tends to lock system
> hard. So hard, that even played sound is looped inside soundcard buffers.
> This problem is persistent over many windows xp installations, various linux
> distros, many nvidia blob drivers. My card is nv7600gs, but even amd radeon
> 9200 suffer same problem.
> 
> Solution is simple: set agp to x4 - problem solved 100%.
> Nvidia blob allowed me to do it.
> 
> Now I'm using fedora13 with nouveau.
> Is there any way to set agp rate to x4?
> 
I've added an option to control the AGP rate, "modprobe nouveau agpmode=4" should do what you want, I hope it helps.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.