[mythtv-users] overscan compensating display manager?

[Daniel Agar]

> I don't believe it is possible to correct my HDMI TV with modeline
> changes, so what I would like is a display manager or window manager
> that runs under X on Linux that can be configured to not use the whole
> screen.
>
> Looking at the readme for Linux and Windows from nvidia, in Linux they
> are completely silent on the topic of DVI overscan.  In the windows
> readme they say to go to control panel and configure the size of the
> desktop.
>
> I am trying to set up Linux and eventually mythtv with a new motherboard
> with built-in hdmi and new binary nvidia driver.
>
> Changing the Modeline causes the TV to go from progressive to interlace
> (I have no 1080p).  It appears that any change to modeline in 720p
> results in the TV displaying in 1080i, and startx -- -logverbose 6
> doesn't yield any errors. Here is an example that modified my modeline
> slightly and threw the TV into 1080i:
>
> Modeline       "1296x724 at 60" 75.13 1296 1328 1608 1640 724 739 746 761
> +hsync +vsync
>
> This is 720p from EDID:
> ModeLine       "720p" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync
> +vsync
>
> Driver results:
> (II) NVIDIA(0): Assigned Display Device: DFP-0
> (II) NVIDIA(0): Validated modes:
> (II) NVIDIA(0):     "1296x724 at 60"
> (II) NVIDIA(0): Virtual screen size determined to be 1296 x 724
> (**) NVIDIA(0): DPI set to (125, 125); computed from "DPI" X config option
>   ...
> (II) NVIDIA(0): Setting mode "1296x724 at 60"
> (II) Loading extension NV-GLX
>
> I don't see any indication that it is going into 1080i mode in the
> Xorg.0.log file, but the raster lines are shimmering, and the TV reports
> 1080i.
>
> If there is no such thing as a desktop in Linux that can center itself
> and scale itself appropriately, is there a way to get the main panel
> into the field of view in KDE?  It seems to always be towards the edge
> of the screen.
>
You can adjust mythfrontend and mplayer to fit the screen. I gave up on
the custom modeline quite some time ago when the nvidia driver started
rejecting my modeline because it wasn't divisible by 8. I just started
adjusting the mythfrontend window size. It's buried in the settings
somewhere, maybe under appearance?