[mythtv-users] Can't read edid all of the sudden

[George Mari]

On 03/10/2010 08:02 PM, Yan Seiner wrote:
> George Mari wrote:
>> On 03/10/2010 07:44 PM, Yan Seiner wrote:
>>> Something broke.... My Sharp Aquos can't provide a valid edid to the
>>> nvidia driver:
>>>
>>> [ 1997.349] (WW) Mar 10 17:33:53 NVIDIA(GPU-0): The EDID read for
>>> display device DFP-0 is invalid:
>>> [ 1997.349] (WW) Mar 10 17:33:53 NVIDIA(GPU-0): unrecognized EDID
>>> Header.
>>> [ 1997.350] (II) Mar 10 17:33:53 NVIDIA(0): NVIDIA GPU GeForce 9500 GT
>>> (G96) at PCI:2:0:0 (GPU-0)
>>> [ 1997.350] (--) Mar 10 17:33:53 NVIDIA(0): Memory: 524288 kBytes
>>> [ 1997.350] (--) Mar 10 17:33:53 NVIDIA(0): VideoBIOS: 62.94.4b.00.51
>>> [ 1997.350] (II) Mar 10 17:33:53 NVIDIA(0): Detected PCI Express Link
>>> width: 8X
>>> [ 1997.350] (--) Mar 10 17:33:53 NVIDIA(0): Interlaced video modes are
>>> supported on this GPU
>>> [ 1997.350] (--) Mar 10 17:33:53 NVIDIA(0): Connected display device(s)
>>> on GeForce 9500 GT at PCI:2:0:0:
>>> [ 1997.350] (--) Mar 10 17:33:53 NVIDIA(0): DFP-0
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0): DFP-0: 330.0 MHz maximum
>>> pixel clock
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0): DFP-0: Internal Dual Link
>>> TMDS
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0):
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0): --- EDID for DFP-0 ---
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0):
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0): No EDID Available.
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0):
>>> [ 1997.351] (--) Mar 10 17:33:53 NVIDIA(0): --- End of EDID for DFP-0
>>> ---
>>>
>>> A few days ago, in the middle of a movie, the TV went blank. Backlight
>>> was on, but the picture was totally black. I restarted the X server and
>>> everything was fine.
>>>
>>> Now it's happened again, except that the panel comes up in the default
>>> 640x480 mode. No EDID information. This system has worked fine since the
>>> last major sofware upggrade on February 10th, and nothing has changed,
>>> so I'm pretty confident that it's not an errant software upgrade. The
>>> hardware has been unchanged for a year or so.
>>>
>>> Could be a) the TV itself is dying (I'd hate for that to be true) or b)
>>> the video card is dying (much cheaper) but before I start hacking away
>>> at hardware I'd like to get some opinions on what could possibly be
>>> causing the EDID to fail suddenly.
>>>
>>
>> How about a loose cable?
> Just reseated all the cables and restarted X; no joy.
>
> :-(
>

How about this line:

 >>> [ 1997.350] (II) Mar 10 17:33:53 NVIDIA(0): Detected PCI Express Link
 >>> width: 8X

I thought most PCI Express graphics cards were 16x - maybe the fact that 
it's only being detected as 8x indicates a problem with the card?

Or maybe it's just a limitation of your motherboard.