Ok, it seems that it really does not like more than one BusId statement, this causes failure: X will not boot. However if the BusId is the same it does boot, but still does  gives rise to just 1 Caymen device for use by poclbm.

I think 6990 cards provide 3 devices at 3 different PCI address at boot, a VGA adapter (for use by the bios etc) , an audio adapter and an ATI GPU device. Subsequently I think they reuse the VGA graphics adapter to add the 2nd GPU, this may be quite wrong of course.

I think that X, thinking there is a VGA adapter at the 2nd location doesnt know what to do.

This translates as, its broken.

Somebody with 6990 cards working like to comment?

I have managed to set this up. I have 2 cards, a 5850 and a 5870. But I only have 1 monitor connected.

shows my 2 cards, but only 1 is visible with the other commands such as:

I suspect this is because one of my cards is disabled because it has no monitor connected. I tried editingetc/X11/xorg.conf and add a second "Device" section, but to no avail.
Anybody with a suggestion here? Do I really have to buy a second monitor?

EDIT: hmm. I reran: I rebooted and now both my boards are active. Apparently manually editingetc/X11/xorg.conf and copying the "Device" Section (setting the PCI slot to the correct id) caused aticonfig to create the missing sections. After restarting X I am now mining with 2 boards yet using one single monitor.

Hope this helps for others who have the same problem.

I am at a similar stage to mjhorn.

I have started to focus less on the xorgfile, leaving out all bus id statements, and more on PyOpen and the sdk.

I see 1 Cayman device only.

Have moved to sdk 2.3. I still see only 1 Cayman device. For a period of 2 days I had 2 of my 3 6990's running (thats 4 devices) under 2.3. I do not seem to be able to achieve even that now.

CLinfo states there is one GPU and one CPU, effectively agreeing with poclbm.

I have become addept at changing sdk version, but I wonder if there is something missing when doing a reinstall of the sdk. This is what I do:

#!/bin/bash
rm siteconf.py
sdk=/opt/ati-stream-sdk-v2.3-lnx32

export LD_LIBRARY_PATH=$sdk/lib/x86
./configure.py --cl-inc-dir=$sdk/include/ --cl-lib-dir=$sdk/lib/x86
make clean
make -j3
sudo make install

And then

check that the name of the library inetc/OpenCL/vendors/atiocl32.icd agrees

and then edit .bashrc for the sdk name which currently is

export LD_LIBRARY_PATH=/opt/ati-stream-sdk-v2.3-lnx32/lib/x86/:$LD_LIBRARY_PATH

Wondering if DISPLAY=:0 is correct.

I'm sorry you guys are having so much trouble.  I'm working on acquiring a 6990 or two and I'll be able to work it out.  It's hard to get a hold of those beasts at a reasonable price.  Hopefully I can get one soon...  I did have one briefly and had some problems, but since I was selling it anyway, I didn't bother to look deeper into the issue.

I live in Kansas City, KS

I want to say I really appreciate your thread.  Helped me alot actually.  Got quite a few cards running now.

I'll send you some coins.  Starting off with 1 first

If you could only see the amount of hair I have left, you would be amazed: I have been tearing it out. But I think I have this figured out now, or at least "a method". The brilliance is not in fact mine.

I had brought 3 cards, and spent days getting nowhere. I was actually thinking of trying to return them because I was SOOO fed up, the did not after al;l seem to do what it said on the tin, which is work with Linux. I mean not in any simple way, and it all the worse for the fact that some people have it working, with, say the catalyst driver 11.3 which seems to have an installer that is broken on Ubuntu 11.04. And to even get X to accept the xorg.conf, I had to rtake out most of the busid statements, which are supposed to be mandatory. Aaaagh!.

The solution is Linuxcoin, in this thread. This is a bootable iso image: its not Ubuntu, but it is linux, and everything is installed, and it runs all 6 cores of my 3 6990 cards.

Of course it would be nice if the power supply did not overheat and blimp of with no warning, but that is another issue!!

http://forum.bitcoin.org/index.php?topic=7374.0

Well, finally able to get things running. After yet another wiping of the drivers and SDK, another reinstall is working, at least when run as root. Still unable to detect the cards as a normal user account however, but this seems like it should be much easier to fix. Any ideas where the permissions might be goofy that clinfo is able to run, but only detects the card as root?

Poclbm isn't seeing my 6870's. How do I install 2.4?

Okay I finally got everything to work.

When I do ./poclmb.py -o btcguild.com -u (username_user) --pass=(password) -p 8332 -d 1, it gives me problem connecting with bitcoin error. It'll stay there for about a minute, then it'll start mining. But then 5 seconds after that, it'll say "verification failed, check hardware!"

Help!! So close!!