Display on HDMI-connected TV to large

Alex Deucher alexdeucher at gmail.com
Fri Feb 19 12:02:38 PST 2010

2010/2/19 Tomasz Torcz <tomek at pipebreaker.pl>:
> On Fri, Feb 19, 2010 at 08:37:13PM +0100, Sebastian Beßler wrote:
>> Hello,
>> recently I changed my dual-head setting from fglrx and old zephod to
>> xf86-video-ati, KMS and xrandr.
>> Nearly all works great, since KDE 4.4 even that, but the display on my
>> TFT-TV is a bit too large on all sides so that it doesn't fit completely
>> in. It is only a cm or so on all sides that overlap but it is really
>> annoying.
>> My 19" TV is connected via HDMI and runs at 1280x720
>  I do not have solution, but I experience this bug also on completly
> different hardware: some Nvidia GeForce 5xxx card, Panasonic 32" (1280x720)
> connected via HDMI. Driver is nouveau as available in Fedora 12.
>  Picture stretches over the edge, pixels are blurred. It isn't problem
> of TV setting, it offers few "zoom" modes, neither looks fine.
>  As my HW is different, but problem the same, it may be something
> in X server itself, not drivers. I suggest opening a bug.

It's not a driver or xserver bug.  The TV is overscanning the image.
You need to either disable overscanning on your TV, or compensate for
it in your modeline.  Google for "underscan modeline"


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