Issue detecting 2nd GPU on Linux Miner

[MinerNiner]

Hello,

I had my rig setup and working successfully with two 5830's running on Ubuntu mostly following the Natty Narwhal Mining Guide http://bitcointalk.org/?topic=7514.0. I was getting close to 285 mh/s per GPU and seeming like things were going smooth. Following a sudden power outage in the house, I've been having difficulty getting the second card to be fully detected or mine.

Both cards work independently if I place them in the 1st PCIe slot, but neither work if in the 2nd.

lspci | grep VGA detects the following:

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 5800 Series (Cypress LE)
02:00.0 VGA compatible controller: ATI Technologies Inc Radeon HD 5800 Series (Cypress LE)

aticonfig --list-adapters detects the following:

* 0. 01:00.0 ATI Radeon HD 5800 Series
  1. 02:00.0 ATI Radeon HD 5800 Series

* - Default adapter

Yet aticonfig --odgt --adapter=all only works on the first GPU:

Adapter 0 - ATI Radeon HD 5800 Series
            Sensor 0: Temperature - 76.00 C
ERROR - Get temperature failed for Adapter 1 - ATI Radeon HD 5800 Series

And when I try to use -d 2 for poclbm to start mining I get the following:

No device specified or device not found, use -d to specify one of the following

•      AMD Sempron(tm) 140 Processor
[1]     Cypress

Any suggestions on how to resolve or ways to confirm it is / is not a hardware issue would be greatly appreciated.

Thanks!

[Anonymailer]

as it followed a power outage, i recommend swapping the cards around and seeing whether it's the card or the second slot that's the problem.

[MinerNiner]

as it followed a power outage, i recommend swapping the cards around and seeing whether it's the card or the second slot that's the problem.

I have done so and both cards work in the first slot. What I (and the few of the people in the ArsBitCoinPool IRC) found strange is that the basic detections show the second slot and the video card in it - but specific actions like get / set the fanspeed generate the errors.

[bcforum]

Does youre xorg.conf file list both adapters? I think the command is "aticonfig --initial --adapter=all" to create a default xorg.conf file.

[MinerNiner]

Does youre xorg.conf file list both adapters? I think the command is "aticonfig --initial --adapter=all" to create a default xorg.conf file.

Indirectly, this did help me solve my problem. There were a number of different xorg.conf files in the /etc/X11/ folder and after removing them, re-creating a new one and rebooting it is now operational again. Another issue that I noticed in swapping the cards was that two of the wires from the motherboard were bumping up against the fan of the second GPU which could have led to a long-term problem down the road.

Thanks for help all!

[bcforum]

aticonfig creates a backup copy every time it runs, only 'xorg.conf' exactly is important.

Good catch on the wire, I had that problem and it showed up as abnormally high temps on one adapter.

You might also enjoy: https://bitcointalk.org/index.php?topic=33550.msg419241#msg419241