Hi, I've got a problem with sgminer on Radeon HD5750. I'm mining quarks on p2pool and I get many many HW.
But the console is showing accepted shares.

Where is the problem?
Try without -w -g options, lower intensity.
Next add them and try some values going up.
try adding +1 to your address if its still to easy go up (+16) if to hard go down (+.1)
Having same problems with HD6770. Maybe this is a driver issue (amd_bytealign function)? Using 13.12 driver with Vista64.
No problems with mining scrypt, but have erros with sha256 too: GPU0: invalid nonce - HW error.
Quark is using SHA-3, so if amd_bytealign implemented in miner's cernel - this can be a problem, as new ATI drivers has a littlebit different amd_bytealign function...