I can confirm that there is something wrong when mining with R9 290's (not sure if other cards mine fine with scrypt). The same cgminer.conf works fine on bamt, giving me 850KH/s on each card, when tested with this distro on the cgminer included, I just get HW errors
Heres the settings im using
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "27400",
"shaders" : "0",
"api-listen" : true,
"api-port" : "4028",
"api-allow" : "W:127.0.0.1",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "950,950",
"gpu-memclock" : "1375,1375",
"gpu-powertune" : "20,20",
"temp-target" : "83,83",
"temp-overheat" : "90,90",
"temp-cutoff" : "95,95",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
I'll try and see if i can recompile the cgminer-opencl and see if it was a bad compile or its the built in amd drivers