Experimental Linux x86 ATI app errors
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Crispin Cooper
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Message 9378 - Posted: 27 Aug 2010, 15:56:07 UTC

Hi,
I'm trying to get Collatz to run on my 32bit Linux (Ubuntu 10.04 32bit) system with an ATI HD4650. I'm using the application:

collatz_2.09_i686-pc-linux-gnu__ati14.tar.bz2 (Linux 32-bit ATI - EXPERIMENTAL!!!)


It is (I think) correctly set up and BOINC will download GPU work units for me. However, when they run they go to "Error in computation" within 3 seconds of starting. Example is attached here:

Fri 27 Aug 2010 16:29:16 BST Collatz Conjecture Starting collatz_1282112751_626564_1
Fri 27 Aug 2010 16:29:16 BST Collatz Conjecture Starting task collatz_1282112751_626564_1 using collatz version 209
Fri 27 Aug 2010 16:29:20 BST Collatz Conjecture Computation for task collatz_1282112751_626564_1 finished
Fri 27 Aug 2010 16:29:20 BST Collatz Conjecture Output file collatz_1282112751_626564_1_0 for task collatz_1282112751_626564_1 absent


I don't know what the issue is, but my card appears to work with no problems in all other situations. I know the app is marked as experimental, but it would be nice to get teh card working.

I've got it successfully installed and running on my HD4550 64bit system (Ubuntu 10.04 64bit) with no problems. It would be nice to get my (more powreful) 4650 working as well...

Any help greatly appreciated.

Crispin Cooper
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Message 9643 - Posted: 10 Sep 2010, 14:54:20 UTC - in response to Message 9378.

Anyone? Is there someone specific I should try and direct this question to?

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Message 9644 - Posted: 10 Sep 2010, 16:55:18 UTC - in response to Message 9643.

Anyone? Is there someone specific I should try and direct this question to?


http://boinc.thesonntags.com/collatz/forum_thread.php?id=309&sort=5#5618
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Crispin Cooper
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Message 9716 - Posted: 20 Sep 2010, 12:55:05 UTC

Hi again & thanks,
From the thread you've linked and a message from "Slicker @ SETI.USA" I've managed to get it further. I needed to create and set environment variable BRT_PERMIT_READ_WRITE_ALIASING to 1.

Unfortunately this has not allowed me to run collatz work units on the GPU. Upon starting a GPU task the computer now freezes. Mouse pointer doesn't move, nothing on screen changes, caps lock key doesn't toggle the light on the keybord on / off, ctrl + alt + F? combinations do nothing. The only thing that works is the alt+sysrq+REISUB reboot trick.

I'm not sure why I'm having this problem. As before any help much appreciated.

Is anyone reading this forum running the 32bit ATI linux client successfully? (and more specifically on Ubuntu 10.04 and an ATI 4650?)

Thanks & apologies if I'm being thick.

PS: I've just tried running the CAL examples provided in the ATI stream SDK and they run with no problems on my system.


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