I'm also seeing this issue on my machine. Monitor signal is lost when login screen appears (I can see the Ubuntu logo flashing just before).
My system: Ubuntu 10.04, 64-bit CPU: Intel i5 760 MOBO: Asus P7P55D LE GPU: ATI 5750-based PowerColor GoGreen-card (pci-express) MEM: 2x2 GB Corsair at 1333 MHz HD: 80 GB SSD X-25 G2 PSU: 750W Corsair DISPLAY: 24" BenQ, using DVI connection between GFX.
I'm also seeing this issue on my machine. Monitor signal is lost when login screen appears (I can see the Ubuntu logo flashing just before).
My system:
Ubuntu 10.04, 64-bit
CPU: Intel i5 760
MOBO: Asus P7P55D LE
GPU: ATI 5750-based PowerColor GoGreen-card (pci-express)
MEM: 2x2 GB Corsair at 1333 MHz
HD: 80 GB SSD X-25 G2
PSU: 750W Corsair
DISPLAY: 24" BenQ, using DVI connection between GFX.