When i use the radeon omega drivers in my laptop, i usually UNDERCLOCK both the core and memory by about one increment each [10Mhz or something like that]. This has solved all graphics instability problems like crashes to desktop, system lockups, pixel flickering, mis-mapped textures, and even a small performance boost!!
Basically these laptops just get too hot when used for a prolonged amount of time, the small reduction in frequency means that the laptops heat doesnt reach a critical threshold where errors are made by the GPU. The performance boost i mentioned refers to the laptop having been running for an hour or so, with a higher clock rate mistakes are made as the graphics card overheats, this actually reduces performance.
Another up-side to this is that the battery lasts for a good 20 minutes longer when playing games! This is because with less frequency, less current is used, which means less drain and less cooling from the fan is needed. So with the fan running less often and lower clock rate, you see a performance boost in battery life.
So this problem for me is sorted, thanks to underclocking.
