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Old 03-26-06, 09:45 AM   #1
maddin
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Question changing console vertical refresh rate - mission impossible?

Hello!

Am I able to change the vertical refresh rate on my consoles ([Crtl]+[Alt]+[1-6])?

On my Suse 10.0 I am using a GeForce 4 MX 440, with the driver version 8178.
Now I like to change the refresh rate on my consoles.

Is that possible?

Thanks for your help in advance

Maddin
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Old 03-26-06, 12:21 PM   #2
pe1chl
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Default Re: changing console vertical refresh rate - mission impossible?

It depends on what kind of consoles you use.
Pure VGA textmode, extended VGA modes, framebuffer.

Documentation is in the file /usr/src/linux/Documentation/svga.txt
Note that this is independent from the installed driver, as these modes are controlled directly by the kernel and use plain VGA settings.
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Old 03-26-06, 01:02 PM   #3
maddin
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Default Re: changing console vertical refresh rate - mission impossible?

I read this file, but the size of the fonts or the resolution is not the problem. 60Hz are damn flickering on my screen. (CRT)

How can I find out, what kind of console I am using?
It is a standard installation of suse 10.0 with an afterwards installed NVidia-8178- driver.

with the kernel-parameter vga=... I can control the size/resolution, but notthe refresh rate.
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Old 03-26-06, 01:21 PM   #4
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Default Re: changing console vertical refresh rate - mission impossible?

Use vesafb-tng as your framebuffer driver. It supports choosing refresh rates.

http://dev.gentoo.org/~spock/projects/vesafb-tng/
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Old 03-26-06, 02:27 PM   #5
pe1chl
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Default Re: changing console vertical refresh rate - mission impossible?

Quote:
Originally Posted by maddin
with the kernel-parameter vga=... I can control the size/resolution, but notthe refresh rate.
Well, not immediately, but indirectly it should be possible.
For example, the standard 80x25 textmode is at 70 Hz.
So when you experiment with different (lower) sizes you should find some that are usable.
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Old 03-26-06, 03:45 PM   #6
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Default Re: changing console vertical refresh rate - mission impossible?

Quote:
Originally Posted by philipl
Use vesafb-tng as your framebuffer driver. It supports choosing refresh rates.

http://dev.gentoo.org/~spock/projects/vesafb-tng/
It doesn't work. These cards report themselves as VBE 3.0 compliant yet do not behave as such. They are locked at 60hz no matter what refresh you set it to. Blame NVIDIA for crippling their cards.

Only way to get > 60hz is with rivafb or nvidiafb, and we already know this doesn't work with the binary Linux drivers.
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Old 03-28-06, 01:56 PM   #7
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Default Re: changing console vertical refresh rate - mission impossible?

Just compiled vesafb-tng as described. It works. At least the console refresh rate is changed.
I didn't had the time to install the binary drivers for X, yet.

As I can remember, I tried nvidiafb a long time ago. I wondered why the binary drivers don't like to get installed. Now I know, that they do not want to go together very long.

I'm going to try to install the binary drivers the next day(s). Then I am going to report my experience and maybe success.

Thanks
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Old 03-28-06, 04:49 PM   #8
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Default Re: changing console vertical refresh rate - mission impossible?

I must add that it does not work on the 5xxx series cards and later.
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Old 04-12-06, 07:13 AM   #9
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Default Re: changing console vertical refresh rate - mission impossible?

Binary driver version 8756 and vesafb-tng-1.0-rc1-r3-2.6.16.patch and kernel 2.6.16 works fine together.
My consoles are now set to 1024x768-32 with a refresh rate of 120 Hz , the binary driver installs without problems.

Thanks for all you replies!!!

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