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