SLES 11 displays blurred screen on HP Prolian DL380 server

[adebuki]

Hi there,

I have installed SLES 11 on HP Proliant GL380 G5 XN 5450.
During installation, everything looks fine and the screen display is normal, but after installation, when it reboots, the screen come up blurred.
We have installed other OS on the same server - Windows and RH - and they don't experience the same problem.
HP website says SLES 11 is supported on the hardware.
Any ideas what the problem might be?

Thank you,
Buki