docs: 2026-08-21 incident (distro upgrade dropped CUDA 12 runtime) + Dankserver now Ubuntu 26.04
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## Server Overview
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Dankserver is an NVIDIA GPU server for vLLM inference. The host runs Ubuntu 24.04 with an RTX 3090 and 62 GB of system RAM.
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Dankserver is an NVIDIA GPU server for vLLM inference. The host runs Ubuntu 26.04 (Resolute Raccoon) with an RTX 3090 and 62 GB of system RAM.
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## Hardware Specifications
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| Property | Value |
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|----------|-------|
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| OS | Ubuntu 24.04.4 LTS (Noble Numbat) |
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| Kernel | 7.0.0-28-generic |
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| Python | 3.12.3 |
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| OS | Ubuntu 26.04 LTS (Resolute Raccoon) |
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| Kernel | 7.0.0-30-generic |
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| Python | 3.14.4 |
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### Active Services
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Historical: on the retired topology, parallel jobs on the Dankserver 35B service died with a cuBLAS crash under researcher load. The affected service is retired. A client abort logs `W srv stop: cancel task, id_task = N`; a natural stop logs only `slot release` with `truncated = 0`. The server never preempts a running generation.
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## Incident: frank-default-small Crash Loop After Distro Upgrade (2026-08-21)
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On 2026-08-21 a release upgrade moved Dankserver from Ubuntu 24.04 to Ubuntu 26.04 (Resolute Raccoon). The upgrade removed the CUDA 12 runtime packages: `libcudart12`, `libcublas12`, `libcublaslt12`, and `nvidia-cuda-toolkit`. The `llama-server` binary links `libcudart.so.12` and `libcublas.so.12`. On every start the binary exited with code 127. systemd restart-looped the service continuously. The health endpoint on port 7770 stayed down.
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Fix: reinstall the runtime packages. The same versions remain in the 26.04 repository.
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sudo apt-get install -y libcudart12 libcublas12 libcublaslt12
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Verify that the binary resolves all libraries:
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ldd /home/dank/llama.cpp/build/bin/llama-server | grep "not found"
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Start the service and check the health endpoint on port 7770.
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After any release upgrade on Dankserver, run the `ldd` check above. A missing CUDA 12 library means the packages need a reinstall.
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## See Also
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- [AGENTS.md](../AGENTS.md) — the git workflow rules
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+2
-2
@@ -8,7 +8,7 @@ CIRU ROCmFPX llama.cpp on Dankclaw (frank-default-large).
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```mermaid
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graph LR
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subgraph Dankserver[NVIDIA Dankserver - Ubuntu 24.04]
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subgraph Dankserver[NVIDIA Dankserver - Ubuntu 26.04]
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A[RTX 3090 24GB + 62GB RAM]
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B[upstream llama.cpp b10121
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frank-default-small, port 7770]
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@@ -34,7 +34,7 @@ frank-default-large, port 52625]
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| Server | GPU | VRAM / Memory | OS |
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| --------------------------------------- | ----------------------------- | -------------------- | ------------ |
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| [[Dankserver System Specs\|Dankserver]] | NVIDIA RTX 3090 | 24 GB VRAM, 62 GB RAM | Ubuntu 24.04 |
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| [[Dankserver System Specs\|Dankserver]] | NVIDIA RTX 3090 | 24 GB VRAM, 62 GB RAM | Ubuntu 26.04 |
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| [[Dankclaw System Specs\|Dankclaw]] | AMD Radeon 8060S (Strix Halo) | gfx1151 unified memory | Ubuntu 26.04 |
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## Active Deployment
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