I’ve updated my Jetson Nano a couple of times in the past few months with “apt-get upgrade” using the Nano without any monitor attached.
Well, I just attached a monitor and all I get is a blank screen. There is no Nvidia logo during boot. There is no desktop after boot (I have auto-login enabled). I just have a black screen. My monitor is turning on when the Jetson Nano turns on so clearly there is a signal.
I am able to ssh login over WiFi so I looked at dmesg and I see this:
[ 227.014501] tegradc tegradc.0: unblank
[ 227.094304] tegradc tegradc.0: blank - powerdown
[ 227.574624] tegradc tegradc.0: blank - normal
[ 227.896835] tegradc tegradc.0: unblank
[ 227.896848] tegradc tegradc.0: update windows ret = -14
[ 227.896851] tegradc tegradc.0: sync windows ret = -14
Please can someone help me get my Displayport video output working again?
P.S.
(I should also mention that the monitor works fine when I plug it into my laptop and the monitor used to work fine with the Jetson Nano a few months ago. I am using the same 5V 4A power supply I used since the start.)
Yesterday update don´t let my Jetson to boot properly…have the NVIDIA logo and some logs and no image on my monitor… I am trying to reflash sd right now
Reflashed memory… everything worked as normal now… updated software again, reboot and the problem appears again. Definitively the last software update have a problem
I have had the same issues as well. I have narrowed the issues down to the ubuntu updates. I do not know what package(s) is the offender but reflashing and installing only nvidia updates should not cause problems.
No offense. I just want to know what kind command would hit this problem.
We already tried apt-get upgrade these days and didn’t hit this error so I am wondering what command may trigger this.
This is for debug only. If more people share the methods or what they’ve done to trigger issue, it would be easier for us to find out cause.
Of course you can refuse if you don’t want to do that.
According to the kernel log in first comment here, update windows gives a -14 error which is “EFAULT”. However, this error would only return from that function if display controller is not enabled. And it is abnormal dc is not enabled after fb driver calls unblank.
I also wonder if everyone here sees the same kernel error.
I’m not offended and am very grateful for your assistance. Does Nvidia have an original SD card system that has been continually upgraded since the Jetson Nano product was created?
All I can do is look at my bash history to tell you what I did with “sudo”:
I did some stuff with udev to get GPIO working
I disabled nvgetty so I could connect my peripherals to the serial port
That’s all.
Unless you have any good ideas, I will try doing a diff on my /etc directory between the virgin SD card and my SD card.
Clearly the smoking gun is the “-14” error which indicates what the actual problem is. I wish I was able to fix that.
@fcomg_e although the device does not have working monitor, you should be able to ssh or use uart console to access the board. If you can do that, are you able to dump the dmesg too?
In my case, when starting the Jetson Nano after NVIDIA logo appears, I see some logs and then only the prompt blinking but I can´t do anything. I have no control over the Jetson Nano.