[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 #24 from sindrehenriksen93@gmail.com ---
I almost forgot — reading through these comments made me realise I also
experience the complete keyboard failure, not just the Fn key issue. After
resume the internal keyboard stops responding entirely. I've been running a
systemd-sleep hook that rescans serio0 on resume to work around it — might be
useful for you, Daniel:

#!/bin/sh
case "$1" in
  post)
    echo -n "rescan" > /sys/devices/platform/i8042/serio0/drvctl 2>/dev/null
    echo -n "1" > /sys/bus/pci/rescan 2>/dev/null
    echo -n "serio0" > /sys/bus/serio/drivers/atkbd/bind 2>/dev/null
    ;;
esac

Install to /usr/lib/systemd/system-sleep/ with chmod +x. Restores basic
keyboard function after resume, but not Fn key translation.

On the amd_pmc angle — I've seen similar "fixes" floating around, but they're
not really viable given the battery impact.

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