Re: Is it possible to issue a VBE3.0 call from Grub (1.95) to set desired refresh rate?

[Robert Millan <rmh@aybabtu.com>]

On Tue, May 29, 2007 at 10:03:35AM -0400, Dimitry Golubovsky wrote:
> Hi,
> 
> I am using Linux 2.6 on x86-64 with framebuffer console, VIA Unichrome
> integrated graphics chip on a VIA K9MM-V motherboard.
> 
> When the videomode is set using Linux kernel boot options
> (video=vesafb vga=...), default refresh rate is 60Hz which causes
> visible blinking on a CRT monitor. The vesafb-tng driver does not work
> in 64 bit kernels. Kernel framebuffer driver modules specific to VIA
> Unichrome were tried, but none worked.
> 
> Is setting a videomode via VBE3.0 call 4f02h with desired refresh rate
> possible from within Grub - using the grub.cfg file, or with some
> programming?

I'm not familiar with the video API either, but vbe.c:grub_video_vbe_init()
looks like a good place to start digging for the information you want.

grub_video_vbe_fini() might also be useful.

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Robert Millan

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