I haven't encountered your issue, but I typically use my laptop as a desktop replacement and choose not to use sleep or hibernate, preferring to shut down the system or lock it with the screen turned off for shorter intervals. Still, I wouldn't be concerned about flashes prior to the logon screen on resume, when things are starting up.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT