when I run apt update, I see the following output: root@spark:~# apt update (...) Err:5 https://workbench.download.nvidia.com/stable/linux/debian default InRelease The following signatures were invalid: EXPKEYSIG CD…

This is a known issue, there are details and a workaround posted here: [image] DGX Spark apt update failure (EXPKEYSIG) Announcements We’re aware of an issue where sudo apt update fails on DGX Spark due to an expired NVIDIA Workbench repo GPG key: The followi…

The fix for Ubuntu repo signature invalid: EXPKEYSIG CD63F8B21266DE3C svc-workbench sudo apt update (still see the error) sudo apt full-upgrade (installs a new key) sudo apt update (no error)

However, I have encountered a new problem now, about canonical-nvidia/vulkan-packages-nv-desktop. Can you fix it? Err:18 https://snapshot.ppa.launchpadcontent.net/canonical-nvidia/vulkan-packages-nv-desktop/ubuntu noble/main arm64 Packages File has unexpected size (5928 != 5920). Mirror sync in pr…

I hit the same thing, looks like an error on the package metadata update. There’s not a CDN reporting that I can find for this repo, so I put an issue on the CUDA CDN repository to see if that tips off the right team at NVIDIA: https://github.com/NVIDIA/cuda-repo-management/issues/33

Thanks, today it seems fixed. Merry Christmas!

Yep - probably @kmittman saving the day - Merry Christmas!

Fixed after apt full-upgrade. Merry Christmas!

Broken apt update?

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

NVES December 16, 2025, 7:47pm 3

Please reference DGX Spark apt update failure (EXPKEYSIG)

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Broken apt update?

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