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compucoder
Apprentice
Joined: 16 Sep 2002
Posts: 246
Location: London, Canada
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 Posted: Sat Jul 26, 2003 4:28 pm Post subject: framebuffer refresh rate and card support |
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Hey, I setup framebuffer support in my kernel and am now enjoying a nice display. What I am wndering about is the refresh rate possibilities....
Right now it uses 60hz where as my minitor can do 85hz at 1024x768. I compiled in vesa support only in my kernel for fb
I really have no clue whats the best I could be getting.
I have a geforce2 MX - didnt really see support for that in the framebuffer kernel options...also not sure what kernel options I have available to config framebuffer??
Right now I use vga=792
IF anyone can offer some suggestions to how I can get the most out of the framebuffer tech with the hardware I have available.
thanx!
Hardware:
Acer Monitor 17" - Vert:50-120, Horz:30-86, 1024x768/100hz
Geforce2 MX 32MB
Via Apollo Pro 133Z Chipset / Agp4x |
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compucoder
Apprentice
Joined: 16 Sep 2002
Posts: 246
Location: London, Canada
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| Posted: Sat Jul 26, 2003 5:53 pm Post subject: |
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igonre my request. Wasnt using the best keywords in my searches on this earlier. Found a plethora of things about fb and my hardware.
thanx. |
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thadk
Tux's lil' helper
Joined: 21 Jun 2002
Posts: 123
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| Posted: Mon Jul 28, 2003 9:12 am Post subject: |
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| Could you perhaps link to your solutions? I'm not finding anything and I have a similiar situation. Everything seems to point towards there being no workable solution. You make it sound like you found one. |
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Wedge_
Advocate
Joined: 08 Aug 2002
Posts: 3614
Location: Scotland
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| Posted: Mon Jul 28, 2003 9:27 am Post subject: |
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AFAIK, using vesa you're stuck with 60Hz, I don't think there's any way around it.
Edit: from linux/Documentation/fb/vesafb.txt: | Code: | Refresh rates
=============
There is no way to change the vesafb video mode and/or timings after
booting linux. If you are not happy with the 60 Hz refresh rate, you
have these options:
* configure and load the DOS-Tools for your the graphics board (if
available) and boot linux with loadlin.
* use a native driver (matroxfb/atyfb) instead if vesafb. If none
is available, write a new one!
* VBE 3.0 might work too. I have neither a gfx board with VBE 3.0
support nor the specs, so I have not checked this yet.
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Peaceable Frood
Guru
Joined: 06 Apr 2003
Posts: 338
Location: New Jersey, USA
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| Posted: Sun Aug 03, 2003 1:22 pm Post subject: |
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Its now possible, you have to patch and recompile your kernel, as well as know about your monitors specs, but you can do it. How to increase your refresh rate using vesafb
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