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Topic: cgminer is only finding single gpu (Read 792 times)

hero member
Activity: 546
Merit: 500
June 16, 2013, 10:54:29 AM
#6
For now, I have switched Xinerama off and switched to using RandR.  This is not ideal, but better than keeping one gpu idle.
member
Activity: 98
Merit: 10
June 15, 2013, 03:09:14 PM
#5
i more or less followed this guide to get it working:
https://docs.google.com/document/d/1Gw7YPYgMgNNU42skibULbJJUx_suP_CpjSEdSi8_z9U/edit

skip the driver part if you know your drivers are new enough.
hero member
Activity: 546
Merit: 500
June 15, 2013, 03:04:54 PM
#4
thanks.

I have four monitors plugged in, and i already tried recreating the xorg config.
member
Activity: 98
Merit: 10
June 15, 2013, 02:59:50 PM
#3
If you dont see the second card in amdcccle you could try:

Code:
sudo aticonfig --adapter=all --initial
This updates the X server settings file.
member
Activity: 98
Merit: 10
June 15, 2013, 02:57:10 PM
#2
Think you need to plug the second 7900 card with a dvi-dummy in order to enable it. Can you see the second card in amdcccle?
hero member
Activity: 546
Merit: 500
June 15, 2013, 09:42:25 AM
#1
cgminer is only finding single gpu


Code:
#:~$ aticonfig --lsa
* 0. 01:00.0 AMD Radeon HD 7900 Series
  1. 07:00.0 AMD Radeon HD 7900 Series


Code:
#:~$ cgminer -n
 [2013-06-15 15:35:36] CL Platform 0 vendor: Advanced Micro Devices, Inc.                   
 [2013-06-15 15:35:36] CL Platform 0 name: AMD Accelerated Parallel Processing                   
 [2013-06-15 15:35:36] CL Platform 0 version: OpenCL 1.2 AMD-APP (1113.2)                   
 [2013-06-15 15:35:36] Platform 0 devices: 1                   
 [2013-06-15 15:35:36]  0       Tahiti                   
 [2013-06-15 15:35:36] 1 GPU devices max detected 

From my research, it seems to be a known problem with OpenCL and Xinerama.  This is a 4 monitor workstation, and I need to have Xinerama switched on.

Most of the info I have found is old.  Are there any fixes?
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