TX2 black screen on boot ... 5 min later comes up with wrong resolution

background:
tx2 used to work with no problems. turned it back on after a few months of non-use.

problem:
on boot resolution was 640x480. no option to change display resolution.

actions to fix:
flash with latest jetpack 3.2 with all the latest drivers.
succeeded.

new problem:
nvidia splash page loads, then screen goes black for about 5 minutes.
finally screen turns on at resolution 1280x720 and detects monitor as 40inch.
other display option (720x576)

actions tried to fix:
used two different HDMI cables
used two different montors (asus 4k), (LG 1080p)

searched the forums. i didnt see any solutions besides running debug statements.

nvidia@tegra-ubuntu:~$ sudo su
root@tegra-ubuntu:/home/nvidia# cat /sys/kernel/debug/tegradc.0/edid 
 00 ff ff ff ff ff ff 00 4c 2d 80 01 00 00 00 00
 2c 0e 01 03 80 59 32 8c 0a e2 bd a1 5b 4a 98 24
 15 47 4a 20 00 00 01 01 01 01 01 01 01 01 01 01
 01 01 01 01 01 01 01 1d 00 72 51 d0 1e 20 6e 28
 55 00 75 f2 31 00 00 1e 01 1d 00 bc 52 d0 1e 20
 b8 28 55 40 75 f2 31 00 00 1e 00 00 00 fd 00 32
 3d 0f 2e 08 00 0a 20 20 20 20 20 20 00 00 00 fc
 00 53 41 4d 53 55 4e 47 0a 20 20 20 20 20 01 81
 02 03 19 71 46 84 13 05 14 03 12 23 09 07 07 83
 01 00 00 65 03 0c 00 10 00 01 1d 80 18 71 1c 16
 20 58 2c 25 00 75 f2 31 00 00 9e 01 1d 80 d0 72
 1c 16 20 10 2c 25 80 75 f2 31 00 00 9e 8c 0a d0
 8a 20 e0 2d 10 10 3e 96 00 75 f2 31 00 00 18 8c
 0a d0 90 20 40 31 20 0c 40 55 00 75 f2 31 00 00
 18 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 ca
root@tegra-ubuntu:/home/nvidia#
nvidia@tegra-ubuntu:~$ sudo get-edid | parse-edid 
[sudo] password for nvidia: 
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
No EDID on bus 0
No EDID on bus 1
No EDID on bus 2
No EDID on bus 3
No EDID on bus 4
No EDID on bus 5
No EDID on bus 6
No EDID on bus 8
1 potential busses found: 7
Bus 7 doesn't really have an EDID...
Couldn't find an accessible EDID on this computer.
I'm sorry nothing was successful. Maybe try some other arguments
if you played with them, or send an email to Matthew Kern <pyrophobicman@gmail.com>.
Partial Read... Try again

/var/log/Xorg.0.log

https://www.dropbox.com/s/weuiym5fdmahrc4/Xorg.0.log?dl=0

Hello,

Few steps to try

  1. Try with hotplug HDMI. That is, you connect your display cable after system is up. We can see if skipping bootloader helps.

  2. How about the result of changing monitors?

  3. Could you share the dmesg during the 5 mins monitor blanking?

In fact, your xorg log shows the best resolution that we support is 1280x720_60. The next one is 720x576_50. This matches your description.

Wayne,
Thank you for responding quickly.

  1. hot plug does not work. same symptoms as hdmi plugged in on boot
  2. changing monitors does not work, same as above
  3. dmesg attached https://www.dropbox.com/s/5hd0j71xh6vd49t/tx2_bad_video_dmesg.txt?dl=0

I captured dmesg for full boot up sequence, then it comes online as 1280x720, then after a few minutes it shuts off. then I did the hotplug test.

Anything else to try?

-Charles

According to log, i2c seems fail to read edid. Are you using nvidia devkit? It looks like a hardware issue.

[  209.328273] tegradc 15210000.nvdisplay: hdmi: edid read failed
[  209.334304] tegradc 15210000.nvdisplay: hdmi: using fallback edid

Wayne,

Yes I am using the TX2 developers kit.

Yeah I figured it was hardware related… since nothing software wise had changed since my last use. I turned it on this week after a period of non-usage and it just did not work.

I did keep it safe, it was not dropped or damaged, or anything.

Can I submit a RMA request?

-Charles

charlesua8r9,

If changing HDMI cable also not works (I believe you had tried), please submit a RMA request.