If you are not sure then you just didn't see it in the GPU-README

On Linux you virtually always need to export your display settings before
starting to get all the cards recognised and/or temperature+clocking working:

export DISPLAY=:0

in the FAQ:

Q: Cgminer cannot see any of my GPUs even though I have configured them all
to be enabled and installed OpenCL (+/- Xorg is running and the DISPLAY
variable is exported on linux)?
A: Check the output of 'cgminer -n', it will list what OpenCL devices your
installed SDK recognises. If it lists none, you have a problem with your
version or installation of the SDK.

and

GPUs mine with OpenCL software via the GPU device driver. This means you need
to have both an OpenCL SDK installed, and the GPU device driver RUNNING (i.e.
Xorg up and running configured for all devices that will mine on linux etc.)

Yeah oddly enough, I did say you need it for a reason ...

@kano
So i did install X server as described here http://askubuntu.com/questions/213678/how-to-install-x11-12-04-lts-x64
and then starded it with xinit
but now i getting this error


What does it mean?

From the Top Post - https://bt.irlbtc.com/view/28402.msg357369#msg357369

>> --temp-cutoff <arg> Temperature where a device will be automatically disabled, one value or comma separated list (default: 95)

To me that implies that the GPU is disabled permanently until you take action to re-enable it.

Now the verbiage in your post does imply that it is *trying* to re-enable your GPU, so I don't know why it isn't.

But I would use a reasonable Temp Target around 60C to 75C, Temp Overheat of 85C to 90C and a Temp Cutoff around 95C

>> --temp-overheat <arg> Overheat temperature when automatically managing fan and GPU speeds (default: 85)
>> --temp-target <arg> Target temperature when automatically managing fan and GPU speeds (default: 75)

Why don't you post your CGMiner command line and tell us what GPU's you are using in this rig?  Maybe we can come up with something that works better?
Sam

I must doing something wrong here.

I want to run only a jalapeno on my netbook, its an atom with integrated graphics. I have the zadig driver installed and the jally is detected. I fire up cgminer with -G or --disable-gpu and it still fails with a windows dialog box popup that says "no opencl.dll found." well I am not using opencl, I want the jally only to mine. what am I missing? using 3.1.1, and the command line is cgminer -G or cgminer --disable-gpu. does opencl.dll actually need to exist even if its not needed?

also, a minor display bug, when I plug the jally into my desktop with an already running cgminer, it detects the jally and it starts hashing with it but the status line for the jally is not added, it just lists the 6870 that was already hashing. shares are reported though in the scrolling part.

os2sam thank you for helping.
I am looking for "universal" for ati 6850 and ati 7770 and for ati 7850
-I d --auto-gpu --auto-fan --gpu-fan 60-80 --temp-overheat 85 --temp-cutoff 95

OK, the only similar hardware I have is my 5770 and here is what I use for it.  Also I have a 5830 which is the first GPU and 5770 which is my 2nd and the 5770 is driving my display

-I 8,d --auto-gpu --gpu-engine 300-960,300-920 --gpu-memclock 250 --auto-fan --gpu-fan 25-85 --temp-target 75 --temp-overheat 85 --temp-cutoff 95

You HAVE to put an Engine Clock RANGE so that CGMiner can clock down to meet the target temp when the fans have done all they can.

Also if you want only one set of clock range's for all your GPU's you can do that, but, you will need to select the highest engine clock of your slowest GPU and then set your low engine clock range to 300 or some low number per what ckolivas said earlier.
Sam

Well if you don't believe me here it is from the CGMiner Primary author.

To be realistic your not going to be able to set all of your PC's to the same settings.  Different GPU's will need different settings or you will have a HUGE performance deficit for your higher end GPU's.  Even the same GPU's in different PC's will most likely have different settings because every card/GPU chip has it's own unique characteristics.

For your 6850 this is *probably* ok

--auto-gpu --gpu-engine 300-940 --gpu-memclock 300 --auto-fan --gpu-fan 50-85 --temp-target 75 --temp-overheat 85 --temp-cutoff 95

For your 7850

--auto-gpu --gpu-engine 300-960 --gpu-memdiff 150 --auto-fan --gpu-fan 50-85 --temp-target 75 --temp-overheat 85 --temp-cutoff 95

If you don't know what your GPU engines are running at then *before* you set --gpu-engine run with just --auto-gpu and go into CGMiner's GPU screen and see what it is running at by default and use that number for your upper limit.

You can also use this hardware comparison chart to help you optimize each GPU, if you want.

https://en.bitcoin.it/wiki/Mining_hardware_comparison

If you set your GPU clock too high it will either go dead and/or get a bunch of hardware error's.
Sam

soryy about the post --temp-cutoff 75
it was just for testing purpose to see when cgminer cuts off gpu and if it will starts again when temperature drops.

it will be good if cgminer can lower gpu engine by default if I setup gpu fan speed for exampe on 90%.
Maybe will be good some more auto-default setup of cgminer withouth so many parameters

yes it works ok. thank you
but as I said maybe developer will think about more auto setup cgminer which will lower gpu engine with fan settings or temperature settings

cut off doesnt restart gpu