Hdmi hardware emulators

we are trying to use HDMI hardware emulator with Jetson in order to be able to see the screen output remotely via vino;
xrandr wouldn’t find any display.
vino doesn’t see any display
Any ideas?

Does the tegra hdmi driver detect this device?

detects to which extent? I saw some messages about nvdisplay in dmesg outputs.
would you need dfmesg output file? some other output of some other command executed?
I assume that installation of vino service might hhhave screwed remote ssh xrandr execution

If the driver detects the emulator, then it should have EDID data from this:

sudo -s
egrep -H '.*' `find /sys -name edid`
exit

(but if you have an actual monitor attached then that too would provide one of the edid files)

egrep -H '.*' `find /sys -name edid`
/sys/kernel/debug/tegradc.1/edid:No EDID
/sys/kernel/debug/tegradc.0/edid: 00 ff ff ff ff ff ff 00 05 e3 cd 0c 00 00 00 00
/sys/kernel/debug/tegradc.0/edid: 03 1b 01 03 80 3e 22 78 ea 1e c5 ae 4f 34 b1 26
/sys/kernel/debug/tegradc.0/edid: 0e 50 54 2f cf 00 d1 cf b3 00 a9 c0 95 00 81 81
/sys/kernel/debug/tegradc.0/edid: 81 00 81 c0 d1 00 02 3a 80 18 71 38 2d 40 58 2c
/sys/kernel/debug/tegradc.0/edid: 35 00 e0 0e 11 00 00 1a e2 68 00 a0 a0 40 2e 60
/sys/kernel/debug/tegradc.0/edid: 30 20 36 00 80 90 21 00 00 1a 56 5e 00 a0 a0 a0
/sys/kernel/debug/tegradc.0/edid: 29 50 30 20 36 00 80 68 21 00 00 1a 00 00 00 fc
/sys/kernel/debug/tegradc.0/edid: 00 32 38 45 38 35 30 0a 20 20 20 20 20 20 01 b2
/sys/kernel/debug/tegradc.0/edid: 02 03 3c 70 52 61 bf 05 04 60 65 66 03 01 1f 12
/sys/kernel/debug/tegradc.0/edid: 13 14 20 5d 5e 5f 62 23 09 07 07 83 01 00 00 6d
/sys/kernel/debug/tegradc.0/edid: 03 0c 00 10 00 38 44 20 00 60 01 02 03 67 d8 5d
/sys/kernel/debug/tegradc.0/edid: c4 01 78 00 00 e3 05 03 01 e2 0f 71 88 83 40 a0
/sys/kernel/debug/tegradc.0/edid: b0 08 2e 70 30 20 36 00 d0 c2 21 00 00 1a 04 74
/sys/kernel/debug/tegradc.0/edid: 00 30 f2 70 5a 80 30 20 46 00 c0 1c 32 00 00 1a
/sys/kernel/debug/tegradc.0/edid: 08 e8 00 30 f2 70 5a 80 b0 58 2a 00 c0 1c 32 00
/sys/kernel/debug/tegradc.0/edid: 00 1e 00 00 00 00 00 00 00 00 00 00 00 00 00 4e

xrandr
Can't open display 

does it look like it is working? no monitor, but emulator attached

Yes, please paste the dmesg.

Also, please check xorg.0.log.

it seems that eventually
emulators started to work
as everything is remote I can consdier them to work as VNC worrks finally
thank you everyone!