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Old 07-11-07, 05:33 AM   #1
creatix
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Join Date: Jul 2007
Posts: 1
Default vesafb (vesa-tng): Refresh rate > 60 Hz

Hi

Is there any way to increase the refresh rate beyond the default 60 Hz for vesafb (vesa-tng) frame buffers?

Below is a dmesg part given the following boot parameter:
video=vesafb:noedid,maxhf:115,maxvf:160,maxclk:350 ,1024x768-32@75

vesafb: Build 060809.4
, MCP61 - mcp61-80, Chip Rev (OEM: NVIDIA)
vesafb: VBE version: 3.0
vesafb: protected mode interface info at c000:d180
vesafb: pmi: set display start = c00cd1b6, set palette = c00cd220
vesafb: pmi: ports = 3b4 3b5 3ba 3c0 3c1 3c4 3c5 3c6 3c7 3c8 3c9 3cc 3ce 3cf 3d0 3d1 3d2 3d3 3d4 3d5 3da
vesafb: monitor limits: vf = 160 Hz, hf = 115 kHz, clk = 350 MHz
vesafb: scrolling: redraw
Console: switching to colour frame buffer device 128x48
vesafb: framebuffer at 0xd0000000, mapped to 0xf8880000, using 24576k, total 131072k

I tried different kind of parameters but the vesa bios seems to ignore settings of the refresh rate. BTW, I have a nforce 430 chipset (mobo: gigabyte m61p-s3).

It seems that I experience the problems illustrated at: http://dev.gentoo.org/~spock/project...leshooting.php
Hence, the chipset is not VBE 3.0 conformant.

Can anybody confirm this?
Is there a workaround, e.g. modify video BIOS?

Thanks for your support.


Cheers,

Thomas
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