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

George Mari george_mythusers at mari1938.org
Thu Mar 11 01:51:49 UTC 2010


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?


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