VGA Compatible?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

I have a monitor which connects via VGA to hdmi adapter. I see that the screen shows up and prompts me to start the whole process for setting up ubuntu but then the monitor loses connection after 5 seconds.

Is VGA compatible? I wanted to double check before I go out and buy a new monitor.

2

Hi, Jetson has not historically worked with HDMI->VGA converters or supported VGA, so would recommend trying with a native HDMI display (1080p if possible).

3

I see. Welp time to update my monitor then, thanks for your answer.

4

This is an old thread, but others may benefit… I am successfully using a DisplayPort to VGA adapter to drive an old 10" VGA display. Works well. One note is that the Apple DisplayPort to VGA adapter does not work, but another non-Apple did work fine.

5

Success probably depends on any EDID added by the adapter. Sometimes a lack of EDID falls back to a mode the monitor supports, but there are some adapters which automatically report some standard modes even if not custom programmed.

6

I use hdmi to vga with AOC E1670Sw but the display color so weird.

7

The VGA adapter is perhaps giving an invalid EDID for that monitor, but something the monitor partially functions with. What do you see from:

sudo -s
cat `find /sys -name edid`
exit
8

The monitor cannot read red signal. I guess got problem with the converter. Thank you for the tips btw, ill try it later

this is my result when execute your script

No EDID
 00 ff ff ff ff ff ff 00 38 73 75 22 00 00 00 00
 01 1c 01 03 a0 1e 17 64 ea e4 de 9e 54 4a 97 23
 1c 4c 54 00 08 00 81 80 81 40 81 00 01 01 95 00
 01 01 01 01 01 01 64 19 00 40 41 00 26 30 18 88
 36 00 00 c0 10 00 00 18 02 3a 80 18 71 38 2d 40
 58 2c 45 00 dd 0c 11 00 00 1e 66 21 50 b0 51 00
 1b 30 40 70 36 00 32 31 34 00 00 1e 00 00 00 fa
 00 81 99 81 c0 81 fc 01 01 01 01 95 0f 0a 01 04
 02 03 1b 61 43 90 84 02 23 09 07 07 83 01 00 00
 67 03 0c 00 20 00 80 28 e2 00 0f 8c 0a d0 8a 20
 e0 2d 10 10 3e 96 00 a0 5a 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2e
9

So there are two logical display controllers, one has a monitor with EDID detected, the other does not. Copy and paste the data into http://www.edidreader.com to see what the monitor is telling the driver about itself. If the modes reported in the driver support the modes the EDID reports, then those modes can be used. The display controller without EDID will just be a case of luck as to whether it works (or if there isn’t actually a monitor, then I’ll predict no display will work :P).

Note that interlaced modes and extension modes tend to not be supported.