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
Frank
334e5d0ee0