I'm using my new laptop I bought earlier this month which also has AMD Radeon. Toggling ALM on and off did nothing on both the SL and firestorm viewer. I went to my device manager and tried to rollback the driver update but it's grayed out. (Almost brand new laptop maybe?) I'm worried I'll install the old driver incorrectly if I pull it from the website and mess up my brand new computer. Are there any third party viewers that will work? Maybe switching to 32bit rather than 64bit?
EDIT: I went to AMD Support page, downloaded Radeon Adrenalin, ran it, let it auto detect my chipset, and downloaded all suggested driver updates, and then restarted my pc. Everything works now, and I can even have ALM enabled. I have no idea why this worked, but it did.