Re: framebuffer console problems: not enough video RAM?

James Miller
2004-10-24T03:25:50Z

Hello Ray:

On Sat, 23 Oct 2004, Ray Olszewski wrote:

> One more thought: although the spec for setting video mode looks like you
> can put in any old values, in fact you have to use a mode that the kernel
> source understands. I don't have a 2.6.x source tree handy, but 2.4.21
> doesn't include any 1024x758-b@75 choices. The only entries I can find for
> 1024x768 in that source are:
>
> /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync *
> /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
> /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
> /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
> /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
> /* 1024x768 @ 100Hz, 80.21 kHz hsync */
>
> So if your LCD panel will support multiple refresh rates, try picking from
> the choices listed above. Or get the kernel source and look in
> ./drivers/video/modedb.c to see what is available in your 2.6.x kernel.

I think I already tried 1024x768 @ 60 Hz and 1024x768 @ 70 Hz--unless I
entered the video= argument wrong. That remains a possibility, but until
I find out how to list them right, I can't say for sure.

On whether my monitor supports multiple refresh rates. This excerpt from
the manual seems relevant, doesn't it? "1.2 Features a. Multi-scanning at
horizontal frequencies of 31KHz to 64KHz and vertical frequencies of 60Hz
to 75Hz."

James