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

[Marius Gröger]

Am 08.08.2010 20:09, wrote Alex Deucher:
> 2010/8/8 Marius Gröger<marius.groeger at googlemail.com>:
>> 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?
>
> You may be seeing this issue:
> http://lists.x.org/archives/xorg-devel/2010-August/011743.html

"In the absence of the user specifying an overriding monitor
configuration, trust the KMS drivers to have correctly probed the output
modes."

Well, in my case I *am* specifying an overriding monitor configuration. 
Is there still a chance that video=1280x720 at 50 could be meaning s.th. 
different then the corresponding mode in X that I explicitly choose.

Regards
Marius