So, this is a moderately common problem according to google. Fix is the usual: Remove the drivers, reinstall. If that doesn't work disable "AMD external events" service. First part didn't fix, second part did. Problem is, without that service, resuming from sleep weirdly lets the login screen come up, but then goes blank. I know it's that and not something else because I've bound a driver reset tool to a hotkey. Reset the driver, screen comes on. Enable service, screen comes on. It's definitely that. Not the greatest workaround. Ideally I'd like to fuck off the reboot message instead. Anyone come across this and found a different solution?