[mythtv-users] nvidia via DVI to LCD TV - no EDID if tv off causing problems

[Nick Rout]

On Mon, Jun 21, 2010 at 8:17 PM, John Taylor <john at vetsurgeon.org.uk> wrote:
> Hi
>
> I have a NVIDIA GPU GeForce 9400 GT running on Ubuntu 10.04 / myth
> 0.23 connected to Panasonic flat screen via DVI using the proprietary
> nvidia driver
>
> If the TV is on during boot, X configures itself correctly; if it is
> off, the graphics card can't retrieve the EDID info and X can not
> start.
>
> I have almost worked around this by manually setting xorg.conf.
> However, I have one last problem
> - if the TV is on during boot, the screen is perfect
> - if the TV is off during boot, when I turn it on I can see X is about
> 20 pixels too large on all sides, almost as if overscan is turned on.
> I can correct this by setting the overscan compensation in
> nvidia-settings, but if the next time the system boots the tv is on
> then the screen is too small! (overscan turned off in TV)

short answer, use nvidia-settings to retrieve the edid while the
system is running. Then point xorg.conf to the edid file (can't recall
the exact line in xorg.conf)