fixed aspect scaling and 16:10 modes

[Rafi Rubin]

You'll see the modes that I keep around in my xorg.conf.  I don't actually use all that many of them with much regularity, but they
are nice have.

I think the ones I consider most important are those that match the most common vesa modes in height while maintaining the 16:10
aspect ratio.  And I also like the have the modes that precisely half the dimensions of the native resolution of the screen.

At this point most the newer screen I work with are 1280x800 or 1920x1200.

So, I'd personally suggest including:
640x400, 768x480, 960x600, 1229x768, 1280x800, and 1920x1200
(not terribly fond of the 1024 high resolutions, too much pain with 5x4 screens).


Anyway, I think aside from listing resolutions people like, ignoring modelines in x config is a bad idea.  Especially if the driver
gives no indication as to why its rejecting them or some warning that it doesn't even want to process them.


As for the fixed aspect scaling.  Its just nice to be able to play some of the less sophisticated games that don't really handle the
resolutions nicely without odd jiggery pokery.  Though just having used xrandr 1.3 for the first time today, I see that manual
scaling and panning will suffice to make things nice for those games.  But it still requires a bit of fiddling.

Alex Deucher wrote:
> On 4/10/09, Rafi Rubin <rafi at ugcs.caltech.edu> wrote:
>> It seems that after one of the updates in march the driver stopped respecting the modelines I defined in my xorg.conf.  It also ignores my requested resolution list, which hadn't included any 4:3 modes.  Is this behavior intentional?  I had resorted to adding my favorites with xrandr in my .Xsession, though I've finally just added them to the list of resolutions in the source.
>>
> 
> Can you be more precise about what problem you are having?  Can you
> post your xorg log and config and explain exactly which modes you want
> or don't want to be available?  You should be able to specify
> modelines in your config per monitor.  See this page for more info:
> http://wiki.debian.org/XStrikeForce/HowToRandR12
> 
>>  Also how can I determine if my setup will support fixed aspect ratio scaling?  Is there anything I can do to help get that working, or help test it?
> 
> you can specify the scaling mode as an xrandr property; options are
> full, center or aspect:
> xrandr --output <output> --set scaler aspect
> etc.
> 
> On pre-avivo chips (r1xx-r4xx) only full and center are available.
> Aspect should be possible, it's just not implemented yet.  On
> avivo-based radeons (r5xx-r7xx and rs6xx), full, center, and aspect
> are supported.
> 
> Alex
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