[PATCH 2/2] drm/radeon/kms: enable underscan option for digital connectors

Marius Gröger marius.groeger at googlemail.com
Sun Aug 8 10:58:13 PDT 2010


Am 08.08.2010 18:22, wrote Alex Deucher:
>> Also, I kind of was hoping that once I could use 1280x720 for both the
>> console and the X screen, it would would allow me to switch between the two
>> transparently. Instead, the TV takes notice of the switch and needs some
>> extra syncing time. Is this expected behaviour?
>
> You mean switching underscan off and on or a VT switch?  The hw has to
> reprogram the mode when it changes the underscan.  As for a VT switch,
> it should just be changing the crtc base, but IIRC there was a bug
> where X and the console used slightly different modes in some cases.

VT switch. I use video=1280x720 at 50 on the command line and select the 
corresponding EDID resolution within X. Is this bug still pending or is 
my scenario supposed to work?

Regards
Marius


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