Arch Linux

pam

Member

Registered: 2012-12-21

Posts: 27

Re: Crossfire Troubles

Hey schmidtbag,
see if this helps for IOMMU....
https://bbs.archlinux.org/viewtopic.php?id=163102

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Main workstation: HP-Pavilion G6-2005ax, AMD quad core trinity APU(devastator) with 7640 HD 512 MB radeon + 7670m 1GB Gddr3 dedicated, 240 gb zalman ssd, 8GB ddr 3 1600mhz, OS: Arch 2013, Ultimate 3.4 lite, Windows 8.
Moderator at www.ultimateeditionoz.com Admin at:http://forumubuntusoftware.info

schmidtbag

Member

From: NH, USA

Registered: 2011-02-08

Posts: 344

Re: Crossfire Troubles

No BIOS update for me, I'm actually using an unofficial beta haha.  But the iommu=soft might work.  For now, it isn't really a concern to me.  I do want IOMMU support but won't be using it any time soon.

lano1106

Member

From: Canada, Montreal

Registered: 2012-11-22

Posts: 95

Website

Re: Crossfire Troubles

good news.

catalyst v13.6 beta apparently has removed the hardlock my X server was experiencing as soon as I was enabling crossfire on my dual 7970 setup.

Still looking how to verify that crossfire is enabled and working but at least the freeze is gone.

I tried the

aticonfig --cfl=on (crossfire logo switch)

and the

aticonfig --mgpu-sli=on

Honestly, I could really not tell the difference with or without crossfire.

schmidtbag

Member

From: NH, USA

Registered: 2011-02-08

Posts: 344

Re: Crossfire Troubles

I forget what it is off the top of my head but there's another aticonfig option you can use that enables a crossfire watermark.  The watermark shows up on the upper-right corner of the screen whenever crossfire is activated, so that's a good way to test if it's working or not.  For my personal use, the Unigine Heaven benchmark is the only thing I have that actually uses crossfire.  I tried about 10 different Humble Bundle games and none of them use the 2nd GPU.  Unfortunately, the linux version of Catalyst doesn't seem to have the same feature Windows has where you can force CF to be enabled regardless of game compatibility.

HalosGhost

Forum Moderator

From: Twin Cities, MN

Registered: 2012-06-22

Posts: 2,095

Website

Re: Crossfire Troubles

$ echo "This thread needs lots of code tags"

This thread needs lots of code tags.

All the best,

-HG

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