Problem running multiple GPU's using bitminter and cgminer

[scooternew]

I know this is my first post here and i'm relegated to newbie world, so i'm hoping a moderator will take pity upon me and move this to the bitminter and cgminer forum.
i'm new to mining 1 month but not new to troubleshooting. I've been working with Linux of various flavors for 12 years now. so i'm just trying to get a handle on this problem and I've been working on it for about week now, in my spare time. kind of hard to do since i'm getting good hash rates out of the 3 gpus separately and i have to take two of the cards down to test. so here's my current setup and a description of the problem below.
thanks.

Current setup:
3 separate systems

MB: Asus M5A97 R2.0
Proc: AMD FX-6100
Ram: 8GB
PS: 850w
Video: 1x XFX HD7850  o/c Gpu:1100Mhz Mem:700 V:1.075 gpu temp: 67c
OS: Xubuntu 12.10 64bit
Overclock Software: AMDOverDriveCtrl
Mining Software: Bitminter 1.32
Hash Rate: 320Mh/s

MB: Intel D955xbk
Proc: Intel Pentium D 950
Ram: 4GB
PS: 500w
Video: 1x XFX HD7850  o/c Gpu:1100Mhz Mem:700 V:1.075 temp: 68c
OS: Xubuntu 12.10 64bit
Overclock Software: AMDOverDriveCtrl
Mining Software: Bitminter 1.32
Hash Rate: 320Mh/s

MB: e-machine
Proc: Intel Pentium D 950
Ram: 2GB
PS: 450w
Video: 1x XFX HD7850  o/c Gpu:1100Mhz Mem:700 V:1.075 temp: 73c
OS: Xubuntu 12.10 64bit
Overclock Software: AMDOverDriveCtrl
Mining Software: Bitminter 1.32
Hash Rate: 320Mh/s

I have been attempting to move the gpu from the e-machine to the asus computer for a couple of weeks now,
however when i do, the bitminter client will not recognize the the second gpu. So i setup cgminer v2.11.3
cgminer will recognize both gpus and send workunit to them, but they will only run at half the hash rate i was getting
with the bitminter client, so i go from 1gpu@320Mh/s to 2gpus@155Mh/s using cgminer. Stranger yet cgminer seems to run one
gpu at the specified 1100mhz v:1.138 from the config file and the 2nd gpu at 300mhz v:.825 so i can understand why i'm only getting
around half the hash rate on the 2nd gpu. Cgminer will not let me change the settings on the 2nd gpu while on the 1st gpu it seems
i can change most settings, with the exception of the memory, which it will not let me underclock to 700mhz.

So i have two problems:
problem one: 1xgpu bitminter client and amdoverdrivectrl will let me change setting at will and hash at 320Mh/s but will
not recognize a second gpu plugged into a 16x slot.

Problem two: 2xgpu cgminer with same oc settings will hash at approx 155Mh/s per gpu (300Mh/s Total) and runs one card at min. clock rates, which
i cannot change with cgminer.

I've tried both fglrx and fglrx-updates from the repositories and i downloaded the latest from amd and tried it. each with clean installs
of xubuntu. makes no difference, doesn't even seem to affect the bitminter client, still get the same hash rates running single gpu.

amdconfig clearly sees both cards as does "cgminer -n" after i run "amdconfig --initial --adapters=all -f and reboot"

I hope i have given enough information about the problem, if anyone has a more specific question about the problem, just ask. and
i'll try to explain in more detail.
Thanks

[camaro69327]

One Question...(out of my league in linuix)

What AMD APP do you Use?

I found in Windows the latest APP don't like 7 series cards. (in windows)

2.5 works great with 2 cards in windows.

[scooternew]

Ubuntu software center reports it as v 2.9
amdcccle reports ccc v-2.17
                        opengl v-4.2.11903

[shockr]

I have this exact same issue,

I am trying to use a 7850 and a 6950

flgrx : 9.00.11-120920a
catalyst : 2.1.7
opengl : 4.2.11903

atitweak shows only the first card (7850) using 99%, while the 2nd card (6950) is always 0.

If I swap the cards pcie slots the 6950 will be 99% and the 7850 will be 0%

I have tried Reaper v13b4 and cgminer.

running xubuntu 12.10 x64.

[scooternew]

I wondered if it might be related to the slot, but i didn't try swapping them since both cards are identical. i may have to get a 1x pcie extender,  so i can try another slot or the older MB i have running.

[shockr]

I wondered if it might be related to the slot, but i didn't try swapping them since both cards are identical. i may have to get a 1x pcie extender,  so i can try another slot or the older MB i have running.

I have ordered a few 1xpcie extenders from ebay early last week.

Im guessing this is driver related, maybe I should (down/up)grade the driver,

what fglrx driver you are running (dpkg -l | grep fglrx)

[scooternew]

i've tried fglrx and fglrx-updates from the xubuntu repositories.
funny thing though, when i do a "dpkg -l | grep fglrx" i get the same version number for both drivers. 9.000-0ubuntu3

[shockr]

hmm,

Just looking at the AMD website, there appears to be 13.3 drivers, so the 9.x we are running is quite out of date: http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx?type=2.4.1&product=2.4.1.3.42&lang=English


Im not physically near my mining machines until wed next week so I cant plug the cards back into the same machine to test if it works.

[scooternew]

Ok, i'm game, i'll rebuild tomorrow, clean xubuntu w/ the 13.1 driver from amd. i'll post my results.

Edit: i'm downloading 13.1 and the 13.3 beta, i'll try them both.

[scooternew]

Ok, lots of testing today, i'll try to make it brief.

Clean install #1 of xubuntu 12.10 64bit w/ amd catalyst 13.3 beta -- 2x HD7850 gpu's

Bitminter - would not detect any opencl gpu's  
cgminer - detected both gpu's, ran each gpu at approx 300Mh/s using poclbm kernel, could not change some O/C settings even though they were withing the default ranges detected for the cards. Vddc could not be changed at all, memclock could not be lowered beyond 900mhz
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Clean install #2 of xubuntu 12.10 64bit w/ amd catalyst 13.1 -- 2x HD7850 gpu's

Bitminter - would not detect any opencl gpu's  
cgminer - detected both gpu's, ran each gpu at approx 300Mh/s using poclbm kernel, could not change some O/C settings even though they were withing the default ranges detected for the cards. Vddc could not be changed at all, memclock could not be lowered beyond 900mhz
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
Clean install #3 of xubuntu 12.10 64bit w/ fglrx driver from ubuntu repository -- 2x HD7850 gpu's

Bitminter - detect 1 opencl gpu -- runs 320Mh/s with O/C from AMDOverdriveCtrl  
cgminer - detected both gpu's, ran each gpu at approx 155Mh/s using poclbm kernel, could not change some O/C settings even though they were withing the default ranges detected for the cards. Vddc could not be changed at all, memclock could not be lowered beyond 900mhz
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
Clean install #4 of xubuntu 12.10 64bit w/ fglrx-updates driver from ubuntu repository -- 2x HD7850 gpu's

Bitminter - detect 1 opencl gpu -- runs 320Mh/s with O/C from AMDOverdriveCtrl  
cgminer - detected both gpu's, ran each gpu at approx 155Mh/s using poclbm kernel, could not change some O/C settings even though they were withing the default ranges detected for the cards. Vddc could not be changed at all, memclock could not be lowered beyond 900mhz
-------------------------------------------------------------------------------------------------------------------------------------------------------------------

Clean install #5 of xubuntu 13.04 beta 64bit w/ fglrx-updates driver from ubuntu repository -- 2x HD7850 gpu's
installed Python-pyopencl from ubuntu repository. According to a ubuntu bug report this package was broken in 12.10 and will not install. this is fixed in 13.04

Bitminter - detect 2 opencl gpu -- runs each gpu 310Mh/s with O/C from AMDOverdriveCtrl still tweaking...  
cgminer - detected both gpu's, ran each gpu at approx 300Mh/s using poclbm kernel, haven't tried O/C settings yet.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------

Bitminter finally works like i wanted it to, not sure if it was because of the lack of a working python-pyopencl package or other changes to 13.04.
i'll have to test the O/C settings in cgminer to see if they work correctly as well.

bottom line.... use xubuntu 13.04 64bit , fglrx-updates, fglrx-amdcccle-updates and fglrx-updates-dev from the repositories, install python-pyopencl?
 

Thank you to a couple of gentelmen who made suggestions in this thread.  

[scooternew]

I had a chance to try cgminer 2.11.4 with Xubuntu 13.04 last night, apparently cgminer depends on libudev.so.0 in /lib/x86_64-linux-gnu....
only libudev.so.1.2.2 is provided with a symlink to libudev.so.1.... meaning that cgminer will not start.

the fix:

cd /lib/x86_64-linux-gnu
sudo ln -s libudev.so.1.2.2 libudev.so.0

cgminer will now start in xubuntu 13.04