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I'm trying with (below my sh file):

export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
cd /home/x/cgminer-3.7.2-kalroth/
find *.bin -delete
sleep 3

cgminer --scrypt -o stratum+tcp://stratum.fast-pool.com:3333 -u user.x -p pass --thread-concurrency 24550 --lookup-gap 2 --auto-gpu --gpu-engine 950 --gpu-memclock 1250 -w 512 -I 20 --gpu-powertune 20 --auto-fan --gpu-fan 40-100 --temp-overheat 90 --temp-target 85 --temp-cutoff 95 -g 1

This gives me average ~660 kh :(

I was trying also with config from GUI miner for windows called "R9 290 high":

cgminer --scrypt -o stratum+tcp://stratum.fast-pool.com:3333 -u user.x -p pass --thread-concurrency 32765 --lookup-gap 2 --auto-gpu --gpu-engine 950 --gpu-memclock 1250 -w 256 -I 20 --gpu-powertune 20 --auto-fan --gpu-fan 40-100 --temp-overheat 80 --temp-target 75 --temp-cutoff 85 -g 1

but it gives e something like this:

 [2014-02-13 11:00:29] Started cgminer 3.7.2
 [2014-02-13 11:00:29] Started cgminer 3.7.2
 [2014-02-13 11:00:29] Probing for an alive pool
 [2014-02-13 11:00:29] Pool 0 difficulty changed to 128
 [2014-02-13 11:00:34] Maximum buffer memory device 0 supports says 774897664
 [2014-02-13 11:00:34] Your scrypt settings come to 2147287040
 [2014-02-13 11:00:34] Error -61: clCreateBuffer (padbuffer8), decrease TC or increase LG
 [2014-02-13 11:00:34] Failed to init GPU thread 0, disabling device 0
 [2014-02-13 11:00:34] Restarting the GPU from the menu will not fix this.
 [2014-02-13 11:00:34] Try restarting cgminer.

Above configs works fine (better hashrate) on windows 7 64, but i prefer to use ubuntu beacause windows is unstable.

Anyone can help me?

I have installed latest catalyst, sdk ofcourse.

1

Since you have R9 290 you likely need patched Catalyst drivers as well as patch cgminer itself as described here. If you already done so, then search reddit and experiment with different configurations. You should be getting around 840-870kH/s with your card.

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