[mythtv-users] Weird HDMI problem

[PJR]

Have you tried ALT-CNTRL-BACKSPACE?  If this is supported, it used to be
'standard' for X-Windows, this can be used to kill the X Server which
will then be auto-restarted, which if the TV is  'on' it might get the
correct data to start.  This is not a solution, just a means of finding
out what might be happening.



On 03/04/12 10:20, Simon Hobson wrote:
> Igor Cicimov wrote:
>
>> When I switch on the TV first and then the Mythtv all is fine. But
>> the other way around I get a black screen. Same happens if I leave
>> the Mythtv box idle for some time: when I switch back to it I get
>> black screen. It is like due to some power savings, I assume on the
>> TV side, the HDMI gets switched off.
>
> I have the same issue (0.24, MythBuntu, Samsung TV, Intel chipset)
>
> What I'm guessing is happening is ...
>
> If the TV is not powered up when the <the graphics system starts>*,
> then there is no feedback from the TV and so the HDMI port is not
> enabled for output - looking in the xorg log, it's clear it's
> auto-detecting displays for all the ports. Thus when you switch on the
> TV, you get a blank screen because nothing was detected and the output
> was not enabled.
>
> * This seems to be not only when the system starts, but also when
> waking from (at least some) sleep mode.
>
>
> I have tried fiddling around with xorg.conf, but not really knowing
> what I'm doing it does seem a lot like you need to configure loads of
> stuff to add a fixed modeline - and I've never managed to get anything
> other than a broken system.
>
> If my TV supported it, I'd be tempted to get an HDMI-CEC adapter and
> try re-configuring the system to turn the TV off/on instead of
> activating a screen saver. I've disabled all the screen saver options
> in the control panel but it still seems to do it.
>