[Bug 221065] ideapad_acpi: unexpected charge_types spam on Yoga Pro 7 14ASP9

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221065

--- Comment #77 from Rong Zhang (i@rong.moe) ---
(In reply to Rick from comment #76)
> (In reply to jeffrey from comment #74)
> 
> I completely blacklisted Ideapad_laptop on my system (using Mint Kernel
> 6.17.0-23-generic) and this seems to have completely solved the 1 second
> pauses every 7 minutes for me.

Hmm, interesting. I assume the pauses had existed before I introduced the
warning message (unexpected charge_types...), right?

This sounds like a slow SMI handling due to the broken firmware.

Could you kindly provide more detailed information about the pause? When it
happened, did you notice a spike in CPU usage? Did you see any dmesg message at
that time? Did it freeze your system completely or just make things laggy?

Could you also monitor the SMI count, i.e.,

  sudo perf stat -e ls_smi_rx -I 1000

..., wait for the pause to occur, and check how many SMIs have occurred during
the pause?

You can also mess around with sysfs attributes of ideapad-laptop, power_supply,
and firmware-attributes to see if reading them causes SMIs:

  sudo tail /sys/bus/acpi/devices/VPC2004\:00/physical_node/*
  sudo tail /sys/class/power_supply/*/*
  sudo tail /sys/class/firmware-attributes/*/attributes/*/*

On my device, reading /sys/class/firmware-attributes/thinklmi/attributes/*/*
always causes 580 SMIs, and other attributes do not cause any SMI.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.