[mythtv-users] Issues with HDMI after TV Turned off

[James Crow]

Norm wrote:
> Phill Edwards wrote:
>>> I have never been able to see the system boot up with HDMI.  The screen only
>>> becomes visable after the X-Display comes up.  I can watch TV and everything
>>> is great from that perspective.
>>>     
>>
>> This isn't going to help much, but it might jog something - so
>> apologies in advance.. I think this may be normal. I seem to remember
>> having a similar issue when I got a new plasma. I think it's something
>> to do with X displaying over the HDMI interface, but the rest of it
>> (like the boot-up) was displaying over the VGA interface. Again,
>> apologies if that makes no sense, but someone else may be able to
>> clarify it.
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>>   
>
> I agree that I can see the system boot with it connected to VGA or 
> component.  HDMI will almost always not come up with another video 
> type connected.
>
> Norm
> ------------------------------------------------------------------------
You did not mention what video card/chipset you are using, but nvidia 
has worked well for me. I know that the nvidia cards look for analog 
devices first, digital next. If neither is found then the video just 
gets sent out the analog (VGA) port. Even with my TV off, but still 
connected to power the video card detects that it is connected and will 
use the digital output.

On both of my HDMI connected TV sets I can see the entire boot process 
over HDMI. Both sets are connected to GeForce 9500 cards. One with 
native HDMI and one with DVI->HDMI. One thing you may want to do is see 
what video modes the TV reports. Try running X with the log set to 
verbose 6. Then check the log for what resolutions the TV set is reporting.

My TV sets will display 480i over HDMI which is about what the bios and 
initial boot screens run at. Once X starts
the nvidia driver takes over and gives you much finer control. I have 
not seen any problem with turning the TV off. Do you remove power or 
just use the on/off built into the TV?

You could try leaving the TV turned off, but connected to power. Boot 
into X with verbose 6 for the X log. Check the log and see if your video 
card can detect the presence of the TV. My cards do even with the TV 
off. If your card does not that may be the cause of your problem.

Cheers,
James