I am testing Windows 8 RTM on a HP Envy 15 1050ca i7 laptop with a ATI (AMD) Radeon HD 4830 video chip.
Some time after installing Windows 8 the system started a crashing loop on start-up, possibly after being in standby.
The system goes to a blank black screen and hangs, or goes to a stop screen or partial stop screen, the stop usually does not make it through collecting information for the error report. After dozens of reboots trying various repair options I can get it into safe mode, or it may decide to work seemingly at random.
I had the same problem exactly with the consumer preview, in both cases (CP and RTM) I have been able to get the system to run normally by manually switching the video driver from ATI Radeon HD 4830 to Microsoft Basic Display Adapter using safe mode.
This system ran perfectly with Windows 7 leading up to the installation of Windows 8. This system did initially have video driver / firmware issues with Windows 7 but those eventually were resolved with a firmware / driver update from HP (Firmware F2B installed)
Has anybody else seen this? Is there a better fix than falling back to the basic generic video driver?
I'd even be willing to send the laptop to Microsoft so they can test a driver fix if that was possible.