[mythtv-users] Emergency video debug

[Mark Wedel]

On 01/30/15 04:49 AM, Ian Evans wrote:
> On Thu, Jan 29, 2015 at 9:23 PM, Nick Rout <nick.rout at gmail.com
> <mailto:nick.rout at gmail.com>> wrote:
>
>     Have you tried real simple stuff like unplugging and replugging the hdmi cable?
>
>
>
> Relative was over watching a Blu-ray with the missus, so I didn't have a chance
> due to the location of the box. When I was finally able to, luckily the box came
> back. Just curious, how does that happen? Neither the TV nor the mythbox had
> been moved. And I did multiple reboots. So what in the physical act of
> re-plugging makes the change? Is it something like a transient electrical blip
> causing the issue and then the reconnecting handshake fixing it?

  Note if it is an overheating problem, this may be normal.  When the fan on my 
video card failed, playback would freeze up and the video card would 'disappear' 
from the system.

  Rebooting the system would have things working again (because the vid card had 
cooled enough in the mean time since it wasn't doing anything), and worked again 
until watching a fair amount of TV (took 10-15 minutes for it to overheat).

  So unless you have actually watched an hour of TV, things may not really be 
fixed.  Running just the GUI doesn't stress the video card at all (or at least, 
not enough to cause it to overheat).

  And as other have said, it could be beyond just the fan for the video card (if 
it has one) - could also be a case fan such that nothing is sucking the hot air 
out of the case, so the video card fan is just circulating hot air.