can't set 60hz v refresh rate

[sean]

David Becker wrote:
> sean wrote:
> 
>>On fc4, updated, I have a dell flat screen with a intel i915g chips -
>>using xoreg i820 - that I want to run at 1280x1024x60.
>>
>>Desktop-> Preferences -> Screen Resoltuion does not let me change the
>>refresh rate. It stays at 75hz.
>>
>>I hand edited xorg.conf so that the monitor section has
>>
>>VertRefresh   60
> 
> 
> It's best to leave these values at whatever your monitor specifies.
> 
> If X doesn't automatically choose a suitable modeline for your monitor
> (I assume you have some kind of TFT that doesn't work above 60 hz), then
> you can calculate these values yourself;
> 
> Find a modeline calculator on the net. Given your monitor's
> characteristics, they allow you to fix one or more parameters (such as
> Vertical refresh rate and resolution) while finding the modeline values
> to accommodate.
> 
> Copy the result of the modeline calculator to the 'Monitor' section of
> xorg.conf.
> 
> I for instance used this to calculate a suitable interlaced
> (exaggerated) 200Hz frequency for PAL television viewing as in:
> 
> Section "Monitor"
>         Identifier   "LG915FTPlus"
>         VendorName   "LG"
>         ModelName    "915FTPlus"
>         HorizSync    30.0 - 107.0
>         VertRefresh  50.0 - 200.0
>         Option      "dpms"
> # TV (PAL) Viewing
> # Measured xawtv dimensions at 760x573
> # 200hz
>         Modeline "760x573 at 200i" 64.46 760 792 1032 1064 573 582 593 603
> interlace
> EndSection
> 
> Then insert or append the modeline identifier ("760x573 at 200i") to the
> list of Modes in the 'Screen' section of xorg.conf.
> 
> Regards,
> 
> 	David
> 
> 


Great idea. I'll try it.

sean