Nothing stood between "memory is tight" and "processes die at random":
the kernel OOM killer only fires after an allocation has already failed,
so a machine under pressure thrashes in reclaim until something breaks
somewhere fatal — seen in practice as Hyprland taking SIGBUS mid-memcpy
from a client shm pool that memory pressure was tearing down.
Enable systemd-oomd, which keys on PSI stall time rather than free
pages, and mark app.slice — and only app.slice — as its kill candidate.
Hyprland runs in session.slice, so the compositor is structurally
ineligible as a victim: oomd takes the app that caused the pressure and
the session survives. Thresholds (50% stall over 20s, Fedora's desktop
defaults) live in an oomd.conf.d drop-in; candidacy ships as a vendor
drop-in under /usr/lib/systemd/user so existing users get it on package
upgrade with no per-user seeding.
New installs enable the daemon from enable-services.sh; a migration
covers existing ones, restarting an already-running oomd so it doesn't
keep stale thresholds until reboot.
Deliberately not earlyoom: it triggers only when free RAM and free swap
are both under threshold, so Omarchy's large, mostly-idle swapfiles
keep it asleep through exactly this failure.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
pacman checks file conflicts during transaction prepare, so the --overwrite
entry added alongside /etc/systemd/zram-generator.conf never got to run: the
copy of omarchy-update-system-pkgs driving the upgrade is the one already on
disk. Every machine carrying archinstall's copy aborted the transaction.
zram-generator.conf(5) reserves /etc for the local admin and has vendors ship
snippets under /usr/lib/systemd/zram-generator.conf.d/, where drop-ins outrank
the main config file. Nothing collides, and the tuning wins whether or not
archinstall's file is still around.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LjeyQZsNBxqyYy9z8KaKm7
Closing the lid could suspend the machine with the session still exposed.
omarchy-sleep-lock held a delay inhibitor and waited for Quickshell to report
the session secure, but a delay inhibitor is a timer rather than a promise:
logind suspends once InhibitDelayMaxSec expires, locked or not. The default is
five seconds, and closing the lid also reconfigures displays -- exactly when
the lock service is waiting for the screen set to settle before it can secure.
The race is now off the critical path. switch:on:Lid Switch runs
omarchy-system-lid-close, which requests the lock the moment the lid closes,
before logind has decided to suspend at all, so the inhibitor window usually
finds the session already secure. A docked lid close does not suspend
(HandleLidSwitchDocked defaults to ignore) and must not lock either, since that
is clamshell mode still in use on the external display, so the handler gates on
the same closed-and-undocked pair logind itself keys on.
Suspends that never touch the lid -- idle timeout, the system menu, low battery
-- still arrive through the inhibitor, so that path gets room to work too. The
shipped drop-in raises InhibitDelayMaxSec to 15s, and the helper derives its
budget from logind's live InhibitDelayMaxUSec rather than assuming the drop-in
landed: a machine that has not reloaded logind yet, or that carries its own
override, gets a budget that fits what logind will actually allow. It leaves
logind a fifth of its own window and caps at 12s, so a hand-raised window
cannot strand a closed laptop awake in a bag.
The wait itself had three defects. Its deadline arithmetic read EPOCHREALTIME
assuming a period, so under any comma-decimal locale the subtraction parsed as
bash's comma operator and silently voided the deadline, leaving only the
attempt counter to stop it. The lock request shared the status polls' timeout
and exited on first failure, so a shell 300ms slow meant suspending unlocked;
it now has its own budget and is simply retried, since asking again is
idempotent. And a refusal the shell reports on stdout with a zero exit --
missing-pam -- read as success, burning the whole window on a lock that could
never happen.
Every call is bounded by what is left of the budget rather than by an estimate
of what the step should cost, so the deadline holds on hardware slower than
anything the constants were fitted to.
Failure is still possible and it used to be silent. It now writes to the
journal and raises a critical notification, which lands on the screen the user
unlocks into.
Incidentally, monitor-recovery-test asserted lid probing against
omarchy-hw-clamshell after that logic moved to omarchy-hw-laptop-closed. It
aborted the file under set -e, skipping the nine assertions behind it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Omarchy installed zram-generator but never shipped a config for it, so the
only zram tuning any machine had was whatever the ISO wrote once, and the VM
sysctls were untouched kernel defaults aimed at spinning disks.
The generator's own default caps the device at 4G, which on a large machine
sends reclaim to the hibernation swapfile far earlier than it needs to go.
Ship min(ram / 2, 8192) instead, matching what Fedora settles on, and state
the priority explicitly since it has to sit above the pri=0 that
omarchy-hibernation-setup gives the disk swapfile.
The four sysctls follow from swap being RAM rather than a disk. swappiness
above 100 says evicting an anonymous page beats dropping a page-cache page
that would have to be read back, which is true once swap is compressed
memory. page-cluster drops to one page per fault because the default of 8
buys readahead for a seek zram doesn't have and pays a decompression for
each page. Zeroing watermark_boost_factor stops fragmentation from producing
reclaim bursts while memory is still free, and raising watermark_scale_factor
gives kswapd room to reclaim in the background instead of letting allocations
stall in direct reclaim. The last two are what actually addresses the stutter
people notice and misread as swap being used too eagerly: proactive swapping
to zram is the cure, and synchronous direct reclaim is the disease.
Every ISO-installed machine already has an unowned zram-generator.conf, which
pacman would refuse to overwrite, so both upgrade paths need it listed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Four scripts that wrote static /etc or /usr files become package-shipped
files. The other config-script audit candidates (omarchy-ai-skill,
nautilus-python, omarchy-toggles, input-group) correctly stay scripts —
they're user-level operations, not /etc writes.
New package-owned files (omarchy-installer/etc/, shipped by
omarchy-settings):
- etc/systemd/system/plocate-updatedb.service.d/ac-only.conf
- etc/udev/rules.d/99-omarchy-power-profile.rules
- etc/udev/rules.d/99-omarchy-wifi-powersave.rules
The two udev rule files are renamed for namespacing (99-power-profile
-> 99-omarchy-power-profile; 99-wifi-powersave -> 99-omarchy-wifi-powersave)
and rewritten to invoke /usr/bin/omarchy-powerprofiles-set and
/usr/bin/omarchy-wifi-powersave instead of $HOME/.local/share/omarchy/bin/...
(both binaries ship in the omarchy package at /usr/bin/).
The battery-present gate from the original scripts is dropped — the rules
trigger on power_supply udev events, which are benign on desktops without
batteries. (The runtime commands no-op on AC-only systems.)
Script changes:
- install/config/plocate-ac-only.sh: DELETED (file ships, daemon-reload
happens via pacman hook).
- install/config/unmount-fuse.sh: DELETED (file ships at
/usr/lib/systemd/system-sleep/unmount-fuse via omarchy-settings).
- install/config/powerprofilesctl-rules.sh: SHRINK to runtime ops
(enable power-profiles-daemon, udevadm reload+trigger).
- install/config/wifi-powersave-rules.sh: SHRINK to udevadm reload+trigger.
- install/config/all.sh: drop the two deleted entries.
bin/omarchy-update-system-pkgs: add --overwrite for plocate-updatedb
drop-in and unmount-fuse paths (the udev rule renames need no overwrite
since the new paths are virgin).
migrations/1779307845.sh: remove the legacy 99-power-profile.rules and
99-wifi-powersave.rules paths on existing installs, then reload udev.
This tree is the source for omarchy-settings to install into /etc
(for paths Omarchy fully owns) or stage at /usr/share/omarchy/etc-overrides
(for paths upstream packages own, which the post_install copies into place).
Package-owned drop-ins (no upstream conflict):
- etc/docker/daemon.json
- etc/systemd/system/docker.service.d/no-block-boot.conf
- etc/systemd/resolved.conf.d/20-docker-dns.conf
- etc/systemd/resolved.conf.d/10-disable-multicast.conf
- etc/systemd/system.conf.d/10-faster-shutdown.conf
- etc/systemd/system/user@.service.d/10-faster-shutdown.conf
(renamed from .../faster-shutdown.conf for consistency)
- etc/systemd/logind.conf.d/10-ignore-power-button.conf
(replaces the previous in-place sed-edit of logind.conf)
- etc/gnupg/dirmngr.conf
- etc/sysctl.d/99-omarchy-sysctl.conf (renamed from the 99-sysctl.conf
appendage; a migration cleans up the old path on existing installs)
- etc/sysctl.d/90-omarchy-file-watchers.conf
- etc/modprobe.d/omarchy-usb-autosuspend.conf
(renamed from disable-usb-autosuspend.conf)
- etc/sudoers.d/omarchy-asdcontrol
(renamed from asdcontrol; $USER -> %wheel for packaging)
- etc/sudoers.d/omarchy-tzupdate
- etc/sudoers.d/omarchy-passwd-tries
(renamed from passwd-tries for namespacing)
Etc-overrides (upstream-owned paths; staged by the PKGBUILD at
/usr/share/omarchy/etc-overrides/ and cp'd in by post_install):
- etc/security/faillock.conf (owned by pam)
- etc/nsswitch.conf (owned by filesystem)
- etc/cups/cups-browsed.conf (owned by cups-browsed)
- etc/plymouth/plymouthd.conf (owned by plymouth)
All sudoers files validate with visudo -cf.
The install scripts that previously wrote these files are updated or
removed in follow-up commits.
