[Bug 26916] Current xf86-video-ati lacks size and position controls for the TV-out

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Mar 15 01:48:38 PDT 2012


--- Comment #12 from Da Fox <da_fox at mad.scientist.com> 2012-03-15 01:48:38 PDT ---
(In reply to comment #11)
> Created attachment 58292 [details] [review]
> v5: more control

Ok, I finally got around to doing a quick test:

- The increased accuracy for horizontal positioning seems to be working great
- The vertical position and horizontal size still use the 'steps of 10', it
would be great if these could be positioned more accurately too.
- There seems to be some discrepancy between NTSC and PAL modes (I only tested
these two): the horizontal position adjust in the PAL case wasn't able to shift
the image as far left as in the NTSC case. In fact setting the value to '0'
(lowest value) it was still too far to the right.
- The same seemed true for the vertical size too (cannot move up the image far
- The horizontal size control is ineffective/not working.
- Is it possible to have a vertical size control too?

Final remarks: It's a bit unintuitive to have 50 as a center, as you have to do
remember to subtract or add the desired offset from 50. If there is a way to
make the negative values work that would also be nice.
Also everytime xrandr is invoked the image on the TV set 'flickers', as if the
tv needs to re-adjust to the signal or something, even if nothing was changed
(e.g. invalid parameter, etc). 
Would it possible to 
a) not take an action/reinit tvout if nothing changed
b) reduce the amount of 'flicker' even when something does change? Perhaps
waiting for vblank or something? (I'm just throwing some ideas).

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