DGX Spark HDMI Display Stops Working Every

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10
1

Hi everyone,

I’m experiencing a persistent HDMI display issue with my DGX Spark that’s becoming a major problem. Looking for help troubleshooting this before I lose important work or return my device within the 30 day window (coming up soon!).

The Problem:

  • HDMI output stops working randomly every 1-2 days

  • Screen goes black, no signal to monitor

  • System is still running (can hear it’s on, but can’t see anything)

  • Hardware Keyboard(s)/mouse input doesn’t wake the display

  • Happens even when I’m actively running overnight processing jobs

What I’ve Already Tried:

  • ✓ Unplugging/replugging HDMI cable multiple times

  • ✓ Tested with different HDMI cables

  • ✓ Tried connecting through HDMI switcher (preferred method)

  • ✓ Tried connecting directly to monitor (same issue persists)

  • ✓ Disconnected and reconnected keyboard

  • ✓ Pressed Escape, Enter, random and many keys.. moved mouse constantly - no response

  • ✓ Attempted SSH connection via Ethernet (couldn’t establish connection and gave up shortly after but ssh shouldn’t be needed and I don’t want a headless server anyway..)

  • ✓ Checked monitor with other devices (Mac Mini, Windows PC) - monitor works perfectly

Why I Believe It’s NOT a Hardware Issue:

  • The moment I force restart the DGX Spark, HDMI works immediately - no cable swapping needed, just press the power button and display comes right back

  • Same setup works flawlessly with my Mac Minis (2 different ones), Windows machine, and MacBook Pro laptops - never had this issue once with any of those.. over years..

  • This only happens with the new DGX Spark

  • I’ve plugged directly into the monitor and still get the same issue (though I normally prefer using my HDMI switcher)

Hardware Setup:

  • Monitor: Raven MTI (2022) - zero problems in 2+ years of use

  • HDMI Switcher: www.amazon.com/dp/B0DHXP11YB (always worked flawlessly)

  • HDMI Cables: www.amazon.com/dp/B091GWJPJ5 (worked flawlessly on all other devices)

  • All of this hardware has been tested extensively with multiple machines without a single issue

My Concerns:

  • I’m running long processing jobs overnight that I can’t afford to lose

  • Even if I’m not running long processing jobs overnight, and have only a browser or terminal open.. if I step away even for a couple hours and come back, sometimes I’m forced to restart it!

  • Can’t force restart without losing all my work and progress

  • This happens regularly (every other day, sometimes every day) making the system unreliable

  • No SSH access set up, so I’m locked out when display fails. And refuse to use my DGX Spark as a headless device anyway.

Questions:

  1. Is this a known display manager bug in Ubuntu on DGX Spark? I’ve fully updated and have even reset the device according to the NVIDIA Recovery Guide once (System Recovery — DGX Spark User Guide)

  2. How do I prevent the screen from blanking/sleeping permanently? (FYI I’ve asked AI and have followed along the GUI System Settings to changed a few option to not turn off the screen/monitor)

  3. Any other recommendations?

  4. Do I have a lemon?

System Info:

  • DGX Spark (native Ubuntu version that came with the system)

  • Connected via HDMI

  • USB-C Keyboard. (have used several and bought a new one, to no avail: RK ROYAL KLUDGE R75)

  • Bluetooth Mouse: Anker 2.4G Wireless Vertical Ergonomic Optical Mouse

  • Screen: Steven Slate Audio Raven MTi (Only monitor since 2021/2022)

Has anyone else experienced this? Any solutions that don’t involve force restarting?

Thanks in advance!