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docs(backlog): re-measure #146 — zero genuine hypridle zombies post-fix
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Re-ran the measurement per the entry's own recipe on the dev box (user
journal persistent to 2026-05-01, full window). Post-linger-fix
(2026-07-16 ~18:00 on) every `Disconnected from pollfd id 1` is a clean
teardown bracketed by a logind `Session N logged out` + a systemd
`Stopped hypridle` within <=11s (07-16 20:13, 07-17 17:04, 07-18 13:35,
07-19 16:46). Zero genuine zombies. Live daemon healthy (ss Recv-Q 0,
NRestarts=0, active, ExecMainPID==pid). Caveat: all four were deliberate
logouts, no compositor crash post-fix yet, so the crash path is confirmed
by argument not observation, and 4 days < the "few weeks" bar. Set an
explicit close condition (~2026-08-10 if still 0). Not closing today.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Bernardo Magri
2026-07-20 19:48:00 +01:00
parent 3536abc656
commit 374f70c76f
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@@ -128,6 +128,26 @@ v1+ polish, not a v1 blocker.
### 146. `[watch]` hypridle hangs instead of exiting when its compositor vanishes
**Re-measured 2026-07-20 (dev box; user journal is persistent back to 2026-05-01,
so this is the full window, not a fragment).** The linger fix landed between 17:25
and 20:13 on 2026-07-16: the last zombie-shaped disconnect is the known one
(17:25:39, PID 1698 — logout→greeter with **no** following `Stopped hypridle`), and
**every** `Disconnected from pollfd id 1` since is a clean teardown bracketed by both
a logind `Session N logged out` and a systemd `Stopped hypridle` within ≤11s
(07-16 20:13:04, 07-17 17:04:38, 07-18 13:35:25, 07-19 16:46:49). **Genuine zombies
post-fix: 0.** The live daemon is healthy too — PID 1707: `active`, `NRestarts=0`,
`ExecMainPID`==pid, `ss` Recv-Q 0 on its D-Bus socket (reading, not the 48 KB-unread
wedge), `WCHAN futex_do_wait`, logged activity <10 min before inspection. **Why this
stays open a little longer, not closed today:** all four post-fix disconnects were
*deliberate* logouts — no Hyprland *crash* (the zombie's actual trigger; the nearby
coredumps were xdg-desktop-portal/swww/swayosd during teardown, not the compositor)
has occurred since the fix, so the crash path is confirmed by argument (a crash ends
the logind session too → no-linger manager teardown reaps hypridle) but not yet by an
observed crash, and ~4 days is under the "few weeks" bar. **Close condition:** if
genuine zombies stay 0 by ~2026-08-10 (≈3 weeks post-fix), close unbuilt; one wedged
process (`ps` alive + `ss` Recv-Q high + `NRestarts=0` while `active`) reopens it as
real work. Everything below is prior context, unchanged.
**Rewritten 2026-07-16, hours after filing: the premise was disproven and almost
nothing survives.** As filed it said hypridle "dies silently ~2×/week — 19 times
in 11 days", with Jul 14 as the clean example ("`CRITICAL` at 13:08:17, then