How to change the screen refresh rate for the boot logo?

Hello guys,

is there anybody who can tell me if there’s an abillity to set the systems screen refresh rate for the boot screen?
On the running system I can change resolution and refresh rate. When I reboot, the new settings for resolution are used for the boot logo but at 60Hz. This mean it will flickr when the system starts the desktop wich runs at 85Hz.

My graphics card is a GeForce 5600.

Thanks for your help.
Your Finest Bug

Very sure VESA mode is used when booting Haiku and switches to video driver if hardware is supported when leaving boot screen.

Even when using VESA mode you can only specify resolution & bit depth - not refresh rate.