Re: How to test a computer's HDMI port on FC33

[George R Goffe]

Sizpack13/Samuel,

Thanks for responding.

This journal got jumbled somehow.

I'm currently booted from a Live Fedora 31 system. I did this in the hope that the monitor would work. It did NOT. When I first connected this TV (2 years ago?) I did nothing special... it just worked. I have been running with kernel option "nomodeset" for a long time. Tried removing that with NO change in behavior.

"stopped working" means: before power cycle, display worked perfectly, AFTER power cycle, TV had a box "NO SIGNAL" or "NO CONNECTION".

I switched IDENTICAL CABLES with no change in behavior. Cables ARE DIRECTIONAL (Saphire 15'). Connected properly, i.e., arrows on both ends pointing AWAY from the computer.

xrandr -q reports:

HDMI-1 disconnected (normal left inverted right x axis y axis)
> what has happend between the working / non-working state ?

just a power cycle
> video related updates ?

none that I know of.
> video related BIOS settings still okay ?

I made no changes.
> settings from the TV still okay (maybe a hidden FW update) ?

I made no changes or FW updates. How would that happen?

On 11.04.20 01:45, George R Goffe via users wrote:
> Hi,
>
> My HDMI to TV (Samsung) stopped working 2 days ago and I'm trying to find out how to test the port. This is a Fedora 33 (Rawhide) (x86_64) system. The cable is good... swapped with a known working cable. Directional 15' Saphire cables... have arrows and are pointing the right direction (away from the system, to the TV).
>
> Any hints/tips/suggestions would be beyond GREATLY appreciated.

what means "stopped working" ?

AFAIK, "known working cable" is relative:
Got two boxes, both "working" with HDMI.
but exchanging the cables => one box: NO picture ...(sometimes)

No idea how to test a HDMI port, just some idea's:

what has happend between the working / non-working state ?

video related updates ?
video related BIOS settings still okay ?
settings from the TV still okay (maybe a hidden FW update) ?
> xrandr -q
> => HDMI yes/no ?

see above
> sound via HDMI and headphone output at the TV

Sound card is broken in the system. TV sound self test worked as did the picture self test.
> what type of graphics device?

01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 550M] (rev a1) (prog-if 00 [VGA controller])
> Does the display settings panel show the other screen?

This is a KDE FC31 live system booted now. KDE system settings for the display does not show the TV.

On Friday, April 10, 2020, 7:45:59 PM EDT, George R Goffe  wrote:

Hi,

My HDMI to TV (Samsung) stopped working 2 days ago and I'm trying to find out how to test the port. This is a Fedora 33 (Rawhide) (x86_64) system. The cable is good... swapped with a known working cable. Directional 15' Saphire cables... have arrows and are pointing the right direction (away from the system, to the TV).

Any hints/tips/suggestions would be beyond GREATLY appreciated.

Best regards,

George...

How to test a computer's HDMI port on FC33

[Ed Greshko]

On 2020-04-11 11:28, George R Goffe via users wrote:
> > what type of graphics device?
>
> 01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 550M] (rev a1) (prog-if 00 [VGA controller])

Is this system a laptop?  Does it have an Fn+KEY which may possibly disable the HDMI port?
I had an Acer which did this years ago.  Drove me crazy.

How to test a computer's HDMI port on FC33

[Samuel Sieb]

On 4/10/20 8:28 PM, George R Goffe via users wrote:
> > what type of graphics device?
>
> 01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 550M] (rev a1) (prog-if 00 [VGA controller])

nouveau or proprietary NVidia drivers?

The live image would be using nouveau.

Had you done any updates between the two reboots?
Did you try booting a different kernel from the boot menu?