The page asserted the Sceptre M34's EDID tops out at 180 Hz. Measured on blankpad
after the merge, `niri msg outputs` lists 3440x1440@239.998 — the claim was false
in main, and it was load-bearing: it is the reason nobody questioned the profile
while the panel ran at 60 Hz for weeks. The real defect was one character: the
profile asked for 239.999, the panel offers 239.998, and niri matches mode strings
verbatim, falling back to *preferred* without failing.
Corrected to the measured mode list, and the deployed 180 is now documented as a
deliberate choice (the link is trained at x8 32.0 GT/s against a max of x16 and the
display engine throws EINVAL), so the next reader neither "restores 240" blind nor
re-pins 180 as a hardware ceiling. The kdl profile comment carries the same facts at
the point of edit, because that is where the next change to this mode gets typed.
Refs #60
desk-1-home.kdl asked the Sceptre M34 for 3440x1440@239.999, a mode the panel
has never offered. niri does not reject an unavailable mode: it logs "configured
mode ... could not be found, falling back to preferred" and drives the EDID
preferred mode - 60 Hz - on every connector event, which is why the monitor
looked like it was dying rather than misconfigured. Read live with
`niri msg outputs`, the mode list tops out at 180.
Also destroys the copies of the phantom number: displays.md carried 239.999 in
its diagram, its panel table and its copy-paste pattern block, and its rule 4
claimed an impossible mode leaves the output dark. Rule 4 now states the real
failure mode, a new section separates config / DP-link / amdgpu-driver faults by
log signature, and wlr-randr is corrected to not-installed (three pages claimed
it; `pacman -Qs wlr` matches nothing).
Applied live with `niri msg output <panel> mode <mode>` - the temporary
per-output path, so no config reload and no logged-out session - verified at
3440x1440 @ 180.000 Hz with the compositor PID unchanged.
Refs #58
Frank's call: no per-host graveyard. The four /system/dankware/ pages carried
two pieces of knowledge that outlive the box, and one that does not.
Distilled:
- omp-docs/system/network.md (new) — LAN topology plus the multi-link resolver
law: a client with two +DefaultRoute links flaps its DNS, and the fix is a
static per-connection resolver, not resolved.conf. Keeps the
flush-caches-loop verification, because one successful dig proves nothing.
- omp-docs/tools/niri/displays.md (new) — the multi-monitor rig: portrait
transforms, absolute positions, auto-placed third panel, the iGPU
render-node pin, and the three failure modes (duplicate output blocks,
positions that do not reflow, a mode the panel cannot drive).
Dropped: the machine's own spec sheet (CPU/GPU/PCI/NVMe inventory for a box
Frank sold) and its quick-facts table. The OS and userspace facts it repeated
already live in tools/cachyos.md.
omp-docs/system/dankware/ moved to .AGENTTRASH/20260928-retired-workstation/
(not deleted; git history holds it too). system/index.md and the niri index
repoint; niri's [[displays]] wikilink now resolves to the new page instead of
the trashed one. kb-lint: 0 violations.
Frank