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The 12B model at 32k context uses only 7.7 GB of the 7900 XT's 20 GB, so
there is ample VRAM headroom for 64k with the q8_0 KV cache — agentic
coding tools are context-hungry and 32k is the practical bottleneck.
The keep-alive stops the default 5-minute idle unload from adding a
reload stall to every resumed session on a single-user workstation.
Update flake to get newer packages.
Assisted-by: Claude Code:claude-fable-5
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The recurring "ollama runs 100% on CPU" regressions were a boot-order
race, not a gfx-target mismatch: ollama.service only ordered after
network.target, and at boot it started between /dev/kfd and the 7900
XT's render node appearing. ollama probes GPUs once at startup, found
none, and silently fell back to CPU until the next manual restart —
which is why the previous HSA_OVERRIDE_GFX_VERSION commit "worked": the
deploy restarted the service on a long-running system, and the restart
was the actual cure.
The card is a 7900 XT (Navi 31), natively gfx1100 — verified that
discovery with no overrides finds it fine and drops only the
unsupported Raphael iGPU (gfx1036). Remove HSA_OVERRIDE_GFX_VERSION and
HIP_VISIBLE_DEVICES (ollama itself warns overriding visible devices can
break discovery).
Real fix: systemd-tag the kfd/renderD* char devices via udev (they get
no device units otherwise) and order ollama after them, so discovery
only runs once the GPU exists.
Assisted-by: claude-code:claude-fable-5
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Move the yokai agent-sandbox account (user, ikai group, /srv/git drop dir,
scoped sudo de-escalation, and the local-clones workflow docs) out of
machines/enzo into a shared profiles/sandbox.nix that both machines import.
The only per-machine value is the human owner allowed to drop into the
sandbox, exposed as a `sandbox.owner` string option so the profile stays
username-agnostic (enzo: hwebs, kusanagi: henz). kusanagi gains the sandbox
it didn't have before; enzo's inline block collapses to one setting.
Assisted-by: claude-code:claude-opus-4-8
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The RDNA3 card reports as gfx1101/gfx1102/gfx11-generic, which the ROCm
build bundled with ollama-rocm has no kernels for, so ollama found no
usable device and ran 100% on CPU after the nixpkgs bump. Force it to
present as gfx1100 via HSA_OVERRIDE_GFX_VERSION.
Also set OLLAMA_FLASH_ATTENTION=1 so the existing q8_0 KV cache actually
engages instead of silently falling back to f16 and inflating VRAM use.
Assisted-by: Claude-code:Opus-4.8
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- replace x-clip with wl-clipboard for wayland machines
- add TODOs I noticed while editing
Assisted-by: Claude Code:claude-opus-4-8
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Assisted-by: Claude:Opus-4.8
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kusanagi set XCURSOR_THEME=Bibata-Modern-Classic but never declared the
theme in Nix — it only resolved while bibata-cursors lingered in an old
nix-env profile. Once that was gone the theme fell off the icon path and
the pointer/hand cursor disappeared.
Standardize both hosts on Adwaita (matching the shared niri config.kdl):
move XCURSOR_THEME/XCURSOR_SIZE and the adwaita-icon-theme package into
the shared profiles/desktop.nix so the theme is always on the icon path.
Drop the inert HYPRCURSOR_* vars (hyprcursor is unused under niri).
Assisted-by: Claude:claude-opus-4-8
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Move the niri bar (yambar on enzo, waybar on kusanagi) and swaybg wallpaper out
of the shared stowed niri config and into per-machine systemd user services
bound to graphical-session.target, mirroring the existing xdg-user-dirs-update
unit. This makes the bar host-correct (kusanagi previously spawned yambar, which
isn't installed there) and keeps host-specific paths out of the shared config.
Also switch the greetd session to a small wrapper script that shows a fortune
greeting in tuigreet.
Assisted-by: Claude:claude-opus-4-8
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Bare niri has no power daemon watching for inactivity, so neither box
slept on its own. Add a user swayidle service bound to
graphical-session.target that fires after 15 min of no input:
- enzo: suspend-then-hibernate (matches the existing lid-switch policy)
- kusanagi: plain suspend-to-RAM, plus Wake-on-LAN on enp9s0 so it can
be woken remotely while the Kavita/Immich/Ollama/NFS servers sleep
Assisted-by: Claude:claude-opus-4-8
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The GNOME desktop was only enabled for its apps, but it pulled in ibus,
whose XDG autostart fired ibus-daemon under our niri session and popped
an "IBus has been started" notification on every login. Remove
services.desktopManager.gnome (and the unused X server/GDM) and instead
install nautilus and loupe directly, enabling gvfs so Nautilus keeps
trash, network shares, and removable-media mounting.
Assisted-by: Claude:claude-opus-4-8
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profiles/desktop.nix becomes a username-agnostic shared base (niri, dconf, the
dark-theme portal fix, greetd, pipewire base, gpg agent, graphics, Firefox with
blank-home/no-bookmarks prefs, common desktop tools, font base). Both hosts now
import it.
Per-host desktop config splits into machines/<host>/desktop.nix:
- enzo: Adwaita cursor + monospace, HiDPI console font, yambar, hwebs groups.
- kusanagi (new file): GNOME/X11, printing/avahi/udisks2, pro-audio
(rtkit/jack/32-bit), gpg ssh support, richer fonts, Bibata cursor, henz
desktop groups, waybar/nm-applet.
Shared profile is username-agnostic (enzo=hwebs, kusanagi=henz): shared desktop
tools moved to environment.systemPackages, per-user groups stay in machine
files. Firefox now owned by the shared profile, so its redundant enable is
dropped from profiles/apps.nix. Dark theme + Firefox tweaks now apply to both
hosts. Both configurations build.
Assisted-by: Claude:claude-opus-4-8
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Split the single-host config into a shared minimal base plus opt-in
profiles, and add a second machine (enzo laptop) alongside kusanagi.
- flake: add mkMachine helper; declare nixosConfigurations.kusanagi and
.enzo; add the disko input; move overlays per-machine.
- common/: minimal base only (boot, networking, tailscale, locale, nix
settings, neovim editor). Old configuration.nix/programs.nix removed.
- profiles/: coarse opt-in bundles (desktop, dev, apps). kusanagi imports
all three and stays byte-for-byte identical to the running system.
- machines/kusanagi/: all workstation-only config (ROCm, Scarlett audio,
optical-disc archiving, NAS mounts, kavita/immich/ollama); hardware
config moved here unchanged. User stays 'henz'.
- machines/enzo/: new laptop. Declarative LUKS+btrfs via disko
(LVM-on-LUKS, TPM2+PIN unlock, zram + encrypted swap for
suspend-then-hibernate); its own minimal niri desktop with
playback-only audio (no rtkit/jack); user 'hwebs'.
Assisted-by: Claude:claude-opus-4-8
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