From 6e0c5c33438e5e898bd075c33a45b3abf9d1b26b Mon Sep 17 00:00:00 2001 From: sommerfeld Date: Fri, 29 May 2026 11:18:15 +0100 Subject: feat(suspend): re-enable suspend on s2idle, drop diagnostic scaffolding MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Confirmed root cause: this hardware's S3 (deep) firmware path triggers a fatal wake-from-suspend hang only on linux-hardened. INIT_ON_FREE + slab hardening + tighter locking turn a latent driver race that stock linux gets away with into an unrecoverable panic so early the journal isn't even flushed. mem_sleep_default=s2idle bypasses the BIOS S3 path entirely (s0ix is a pure-kernel low-power state) and suspends/resumes reliably under hardened. This is a widespread Lenovo S3 firmware issue across post-2018 ThinkPads (see Ubuntu T560, X1C9/10/11 reports). Lenovo themselves moved newer firmwares to s2idle-only. Not a linux-hardened bug per se; just hardened being a strict enough kernel to make the bug fatal. Keep: * mem_sleep_default=s2idle in etc/kernel/cmdline-linux-hardened.tmpl (only the hardened UKI; stock linux keeps unchanged shared cmdline) Revert (all the diagnostic / speculative scaffolding from the last few commits): * MODULES=(intel_lpss_pci) → MODULES=() — Arch wiki touchpad fix was not the cause here * nmi_watchdog=panic softlockup_panic=1 panic=10 — only needed to auto-reboot during diagnosis * no_console_suspend — diagnostic-only * etc/systemd/logind.conf.d/20-no-suspend.conf — masking workaround * sleep-target masking block in run_onchange_after_deploy-etc.sh.tmpl, replaced with a one-shot cleanup that removes any leftover /dev/null symlinks from systems that ran the previous version * systemd-pstore.service from systemd-units/system.txt — added only to catch the diagnostic panic * diagnose-suspend.sh helper (and its .gitignore/.chezmoiignore entries) * sway suspend → lock-session keybind workaround * power-menu.sh Suspend entry restoration * KEYBINDS.md docs --- etc/mkinitcpio.conf | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'etc/mkinitcpio.conf') diff --git a/etc/mkinitcpio.conf b/etc/mkinitcpio.conf index d8ae3ff..fab5fa1 100644 --- a/etc/mkinitcpio.conf +++ b/etc/mkinitcpio.conf @@ -4,7 +4,7 @@ # run. Advanced users may wish to specify all system modules # in this array. For instance: # MODULES=(usbhid xhci_hcd) -MODULES=(intel_lpss_pci) +MODULES=() # BINARIES # This setting includes any additional binaries a given user may -- cgit v1.3.1