newer kernels can't see \ HDMI

[John Wendel]

On 02/13/2013 05:10 PM, Per Bothner wrote:
> [again somewhat off-topic.]
>
> I have 60" Mitsubishi TV connected to the HDMI output of
> a home-brew box running MythTV on Fedora 17.  I have not been
> able to do any updates lately for fear of losing the one
> kernel that can see the Mitsubishi.
>
> When I boot into 3.5.3-1, it works - I get the Fedora (Gnome)
> desktop on my TV connected to the HDMI output.
>
> When I boot into 3.6.10-2, it doesn't see the TV.  I can hook
> up a smaller monitor to the VGA output, and that works.  When
> I start System Settings / Display -> Detect Monitors it only
> detects the VGA monitor.
>
> The two cases are otherwise the same - the difference is just
> kernel I select in the Grub screen.  I don't dare to update
> Fedora (at least not the kernel), because then I'll lose the
> one working kernel.
>
> I also booted up the F18 Live disk (KDE).  Same deal: I get a
> desktop on the VGA monitor, but nothing on the TV.
>
> Also, the newer kernels don't seem to detect the correct
> resolutions on the (admittedly old) VGA monitor.
>
> I also tried replacing with TV with 27" monitor, also
> connected to HDMI - same result: 3.5.3-1; 3.6.10-2 doesn't.
>
> Does this ring a bell with anyone?  I do have Xorg.0.log
> and /var/log/messages copied from a non-working setup.

What video card? Which video driver?

I have F18, latest updates, with an Nvidia card and Nvidia
driver working with HDMI output, video and sound.

John