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1b596c8c30
NVIDIA GB10, aarch64, 121 GB unified, sm_121. Ships booting to graphical.target with GDM and GNOME Remote Desktop running. playbooks/gx10-headless.yaml sets multi-user.target, stops gnome-remote-desktop, masks the sleep/suspend/hibernate targets, makes logind ignore lid and idle, and adds sshd keepalives so a stalled link does not kill a long-running job. Two things learned the hard way and recorded in the playbook: - gdm is a STATIC unit on Ubuntu, pulled in by display-manager.service and never 'enabled'. A guard of always skips, and a verify written the same way passes while the desktop is still running. Both now test is-active. The first run reported six green verifies having not stopped gdm. - elway's --sudo applies only to ad-hoc --shell/--upload. Playbook steps run as the connecting user and must carry their own sudo; connect as infra-ops. The playbook refuses to stop the display manager while a seat session is held, overridable with --var force_dm_stop=true. Networking is deliberately out of scope: the box is on a desk on Wi-Fi with a temporary DHCP lease and no ethernet carrier, and belongs to the rack-install change.
pfi-gx10 — ASUS Ascent GX10 (NVIDIA GB10)
Grace-Blackwell desktop supercomputer. Registered 2026-09-01.
| GPU | NVIDIA GB10, driver 580.173.02, compute capability 12.1 (sm_121) |
| CPU | 20 cores, aarch64 |
| Memory | 121 GB unified (CPU and GPU share it — not 121 GB plus VRAM) |
| Storage | 916 GB NVMe, 6% used |
| Kernel | 6.17.0-1031-nvidia |
| Hostname | pfi-gx10 (shipped with static gx10-a745, corrected) |
⚠ The address in ssh-target is TEMPORARY
As of 2026-09-01 this box is on a desk, on Wi-Fi, holding a DHCP lease at
10.100.10.226 on nh3-userland (VLAN 10). Ethernet enP7s7 has no carrier.
It is going into the rack later. At that point it needs a wired link, a static
address, a decision about VLAN placement (a compute node arguably belongs on
nh3-servers, VLAN 50, with the rest of them), a dns/internal.yaml entry, and
this file plus ssh-target updated. None of that was configured now — an
address that is about to be wrong is worse than DHCP.
Expect ~65–80 ms RTT until it is wired. That is Wi-Fi power-save, not a fault.
Access
infra-ops with NOPASSWD sudo (operator-bootstrapped). lkraven also has key
auth but needs a password for sudo — automation must connect as infra-ops.
Headless conversion
playbooks/gx10-headless.yaml — run it with the infra-ops@ prefix, since
elway's --sudo applies only to ad-hoc commands and playbook steps carry their
own.
Ships booting to graphical.target with GDM and GNOME Remote Desktop. The
playbook sets multi-user.target, stops the remote-desktop service, masks the
sleep/suspend/hibernate targets, tells logind to ignore lid and idle, and adds
sshd keepalives so a stalled link does not kill a long job.
⚠ GDM is static on Ubuntu — pulled in by display-manager.service, never
"enabled". Guard and verify on is-active, not is-enabled; the latter passes
trivially while the desktop is still running.
The playbook will not stop GDM while someone holds a seat session. Override with
--var force_dm_stop=true, or just let the rack-install reboot handle it.
Relevance to Flash-Next
sm_121, not sm_120. The SGLang fork evaluated for ana-ml2 (henge item 49)
narrows to exact SM120 and explicitly excludes SM121/GB10 — it does not apply
here. This chip has its own path: the DGX Spark recipe, which mmaps the ~48 GiB
PLE n-gram table from NVMe rather than holding it in memory. 121 GB unified and
822 GB of free NVMe make that viable on this box in a way it is not on a 96 GB
discrete card.