[Bug 221383] ideapad_laptop: Fn hotkeys stop emitting after s2idle resume on IdeaPad Slim 3 14ARP10 (Ryzen 7735HS)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221383

--- Comment #6 from sindrehenriksen93@gmail.com ---
Tested as requested. All seven modules blacklisted:

  blacklist ideapad_laptop
  blacklist lenovo_wmi_other
  blacklist lenovo_wmi_helpers
  blacklist lenovo_wmi_capdata01
  blacklist lenovo_wmi_hotkey_utilities
  blacklist sparse_keymap
  blacklist platform_profile

`update-initramfs -u` after — without the initramfs rebuild
ideapad_laptop still loads early. Post-reboot, `lsmod` confirms none
of the seven is loaded. Testing only against /dev/input/event2 (AT
Translated Set 2 keyboard), since event5/event6 paths are gone with
these modules blacklisted.

Working state (post-boot, pre-suspend):

  volume-up   Fx press -> MSC_SCAN 0xb0  KEY_VOLUMEUP
  volume-down Fx press -> MSC_SCAN 0xae  KEY_VOLUMEDOWN
  mute        Fx press -> MSC_SCAN 0xa0  KEY_MUTE

So event2 works normally without any of these modules — the EC is
translating Fx to the E0-extended media scancodes and atkbd is
delivering them as expected.

Broken state (after s2idle resume, ~21 min suspend):

  volume-up   Fx press -> MSC_SCAN 0x3d  KEY_F3
  volume-down Fx press -> MSC_SCAN 0x3c  KEY_F2
  mute        Fx press -> MSC_SCAN 0x3b  KEY_F1

Same machine, same kernel, same blacklist still in effect. The EC has
stopped translating Fx to media scancodes and is emitting raw F-key
scancodes (0x3b..0x3d = F1..F3).

Conclusion: the regression reproduces with ideapad_laptop,
lenovo_wmi_*, sparse_keymap, and platform_profile all absent. None of
them is in the code path that breaks. Matches your firmware/EC
hypothesis.

Attaching the two evtest captures (event2, --grab):
  evtest-blacklisted-working.txt
  evtest-blacklisted-broken.txt

Happy to run further tests — e.g. dynamic_debug on the acpi/ec path
across suspend/resume, `pm_test core/platform/processor` to narrow the
phase, or acpidump/ectool snapshots in both states. Let me know what
would help most.

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