[arch-general] No signal on external monitor with 3.5 Kernel

Hi Everyone, I have an external monitor connected to my laptop via HDMI which I use side by side to get an extended desktop. When I boot the system with 3.5 Kernel I don't get any signal on the external monitor, laptop display and everything else work fine. It works fine with 3.4.x Kernels, and I believe it's not a X problem as it's not getting any signal even before X starts (It does with 3.4.x). I was wondering if anyone else has this issue and possibly a solution, or is this something I need to submit upstream? Thanks. -- Sudaraka Wijesinghe