[mythtv-users] new HDMI cable give no display
ramonhofer at bluewin.ch
Tue May 24 19:41:26 UTC 2011
On 05/24/2011 06:40 PM, Tim Draper wrote:
> On 24 May 2011 17:21, Ken Truesdale <kat at tiac.net
> <mailto:kat at tiac.net>> wrote:
> On May 24, 2011, at 12:07 PM, Tim Draper wrote:
> > upto now i've been using an unknown HDMI cable (came with sky+HD
> box, which i've now sold). i've had to buy a new HDMI cable to go
> with my mythtv setup.
> > the local shop had 2 types, so i went for the more expensive
> HDMI 1.4 specced cable.
> > now when mythtv boots, i either get no display (with the tv
> switching between wide and 16:9 ratio), or a load of snow over the
> screen (like an untuned analogue tv signal).
> > i reboot the mythtv pc, and it shows a picture fine at bios
> level, just not once mythbuntu starts booting.
> > i've been able to get into mythbuntu 'safe mode', enter safe
> graphics mode, and re-configure the display. reboot as requested,
> but still no display once mythbuntu starts to load.
> > annoying.
> > but whats even more annoying, is the cable works perfect with my
> HDMI laptop (intel HD graphics) at 1080p.
> > since i bought 2 of the same cable, i try both; they both
> exhibit the same issue with mythbuntu.
> > mythbuntu setup:
> > nvidia 210 gfx
> > mythbuntu 0.24
> > any ideas how i can fix this? i know it's a bit overkill, but i
> COULD rebuild it from scratch if it came to it. i'm not very good
> with linux - i can get my way around and usually understand what
> im doing when i follow a guide, but not actually diagnosing issues.
> > oh, SSH and VNC works fine and mythtv seems to be fully working
> (hdd activity when i use the controller to go around the menus),
> just im getting no display..
> So MythTV used to work with your TV with the old cable and doesn't
> with the new cable? Is it possible that the old cable wasn't
> setting up a good connection to the Myth box and the video display
> was taking a guess. Now you can get a good EDID through the new
> cable and your Myth box doesn't have the right drivers? If so,
> then it is just a matter of debugging why your Myth box doesn't
> like your TV now that it knows what it is.
> The alternative is that the cable isn't working with your setup
> which seems easy enough to check by returning one of the two
> cables you got and trying the other kind that was offered.
> god knows what the issue is; these new cables dont seem to like the
> mythtv pc. work fine with everything else, and other cables work fine
> with mythtv.
> i think i'll swap cables around to get a working setup for tonight,
> and see what they can do for replacement tomorrow..
> i think i might look at upgrading to 11.04/0.24.1 next week and see if
> i suffer the same issues.
> thanks for the sugestions..
I had a similar problem: no problem with a DVI to HDMI adapter and a
short cable. But when I changed the short cable with a longer one there
was no picture.
When I connected my Nvidia card with the adapter and the short cable to
the audio amplifier (Yamaha) and from there to the TV (Sony) I had no
I suppose the signal from the PC was just too weak.
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