Frank
334e5d0ee0
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
65 lines
2.2 KiB
KDL
65 lines
2.2 KiB
KDL
// ────────────── Desk Profile: home (current rig) ──────────────
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// Applied by symlinking this file to cfg/display.kdl (see scripts/desk.sh).
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// Panels are keyed by EDID identity (manufacturer model serial), NOT by
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// connector name — connector names reshuffle between desks; identity travels.
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//
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// requires: Sceptre Tech Inc Sceptre M34 Unknown
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// requires: Lenovo Group Limited 0x40A9 Unknown
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// optional: HDMI-A-1 (PM1601, dock-dependent)
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// The panel offers 3440x1440@239.998 as well as @180.000 (`niri msg outputs`, 2026-10-21), and
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// 180 is driven DELIBERATELY: the link trained at x8 32.0 GT/s against a max of x16 and the
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// display engine is throwing DMCUB errors with EINVAL page flips after s2idle, so the 240-class
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// mode stays undriven until a reboot clears that state. niri matches mode strings VERBATIM and
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// does not round: "@239.999" is not "@239.998", and a mode it cannot find does not fail — it
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// logs "could not be found, falling back to preferred" and drops the panel to 60 Hz on every
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// reconnect, which is how this desk ran for weeks. Copy the string from `niri msg outputs`.
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// Reasoning and triage: omp-docs/tools/niri/displays.md ("The config pattern", rules 4 and 5).
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output "Sceptre Tech Inc Sceptre M34 Unknown" {
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mode "3440x1440@180.000"
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scale 1
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transform "normal"
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position x=1581 y=-600
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focus-at-startup
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}
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// PM1601 portrait panel (dock-dependent). EDID string NOT captured as of
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// 2026-10-09 (panel disconnected) — connector-keyed placeholder.
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// When plugged in: run `desk.sh capture`, re-key this block to the printed
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// long name, update #optional above.
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output "HDMI-A-1" {
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scale 1
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transform "90"
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position x=1200 y=0
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}
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output "Lenovo Group Limited 0x40A9 Unknown" {
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scale 1.0
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position x=-339 y=-240
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focus-at-startup
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}
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output "DP-2" {
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mode "3440x1440@180.000"
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scale 1.0
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transform "normal"
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position x=1581 y=-600
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}
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output "eDP-1" {
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mode "1920x1080@60.001"
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scale 1.0
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transform "normal"
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position x=-339 y=-240
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}
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output "DP-1" {
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mode "3440x1440@180.000"
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scale 1.0
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transform "normal"
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position x=1581 y=-600
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}
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