https://bugzilla.kernel.org/show_bug.cgi?id=221746
Bug ID: 221746
Summary: Acer Nitro ANV15-41: Mic-mute LED not
controllable/synced via acer_wmi
Product: ACPI
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: low
Priority: P3
Component: Other
Assignee: [email protected]
Reporter: [email protected]
Regression: No
On the Acer Nitro ANV15-41 (AMD Ryzen 5 6600H + NVIDIA RTX 3050 hybrid), the
microphone mute function works correctly via software (e.g. wpctl set-mute),
and the Fn+F4 hotkey correctly sends a scancode recognized by the kernel input
layer (reports as XF86Launch6 under Wayland/libinput, key code 193). However,
the physical mic-mute LED on the keyboard does not light up or reflect the mute
state in any way.
Steps to reproduce:
Boot into Arch Linux (kernel 7.1.3-arch1-2), Hyprland/Wayland session.
Mute the microphone via software: wpctl set-mute @DEFAULT_AUDIO_SOURCE@ toggle
(or press Fn+F4).
Observe: audio is correctly muted (confirmed via wpctl status / application
behavior).
Observe: mic-mute LED indicator on the keyboard does not illuminate.
Expected behavior:
Mic-mute LED should light up when the microphone is muted, matching Windows
behavior on the same hardware.
Actual behavior:
LED never activates regardless of mute state.
Additional investigation performed:
ls /sys/class/leds/ shows no mic-mute-related entry — only input3::capslock,
input3::numlock, input3::scrolllock, input4::capslock, input4::numlock,
input4::compose, input4::scrolllock, input4::kana, and Ethernet activity LEDs
(enp3s0-*::lan). No acer:: or platform::mic* LED class device is exposed.
acer_wmi module is loaded (confirms general WMI support works on this model for
other functions, e.g. battery reporting per frederik-h/acer-wmi-battery#92).
This appears consistent with similar unresolved reports on other Acer Nitro
models (AN515-47, AN515-57, AN515-58) where mute audio works but the LED does
not sync, suggesting Acer's mic-mute LED control uses an EC/ACPI method not yet
implemented in acer_wmi.
System information:
Model: Acer Nitro ANV15-41 (AMD + NVIDIA hybrid)
CPU: AMD Ryzen 5 6600H
Kernel: 7.1.3-arch1-2 (Linux archlinux 7.1.3-arch1-2 #1 SMP PREEMPT_DYNAMIC
Thu, 09 Jul 2026 19:55:55 +0000 x86_64 GNU/Linux)
Distro: Arch Linux
DMI product name: Nitro ANV15-41
DMI board vendor: RB
BIOS version: V1.20
Relevant kernel module:
acer_wmi
dmesg | grep -i acer:
[ 0.000000] DMI: Acer Nitro ANV15-41/Sportage_RBH, BIOS V1.20 10/23/2025
[ 7.310348] acer_wmi: Acer Laptop ACPI-WMI Extras
[ 7.310372] acer_wmi: Function bitmap for Communication Button: 0x1
[ 7.324282] input: Acer WMI hotkeys as /devices/virtual/input/input13
dmesg | grep -i wmi:
[ 1.337633] wmi_bus wmi_bus-PNP0C14:01: [Firmware Bug]: WMBF method block
execution control method not found
[ 1.338090] wmi_bus wmi_bus-PNP0C14:01: [Firmware Info]:
FDAE8C0C-6FA2-49C3-87A0-97483BE485F2 has zero instances
ls /sys/bus/wmi/devices/
05901221-D566-11D1-B2F0-00A0C9062910-16
05901221-D566-11D1-B2F0-00A0C9062910-18
05901221-D566-11D1-B2F0-00A0C9062910-2
1E2A0DA0-2B9E-424F-9C87-B1DAC3F4E9DA-1
1EA0BC57-521E-461B-A7A9-5D36F141A82A-6
2E6B3CE2-6A58-4AF2-8767-4640CA8A38E3-4
48E699DB-C63C-4472-9468-4B4189905D24-15
4BB53443-488A-430D-A25C-874660E23BDD-12
61EF69EA-865C-4BC3-A502-A0DEBA0CB531-5
676AA15E-6A47-4D9F-A2CC-1E6D18D14026-3
77B0C3A7-F71D-43CB-B749-91CBFF5DDC43-10
79772EC5-04B1-4BFD-843C-61E7F77B6CC9-7
7A4DDFE7-5B5D-40B4-8595-4408E0CC7F56-11
9F98130E-3B48-40B3-9402-DE8E160F30CC-14
A9D77EF6-55E0-4706-B139-96ACE13F2269-13
ABBC0F6A-8EA1-11D1-00A0-C90629100000-17
B2526ED4-CB45-49FA-9230-8D2FE8AFB8EC-0
F75F5666-B8B3-4A5D-A91C-7488F62E5637-8
FE1DBBDA-3014-4856-870C-5B3A744BF341-9
(79772EC5-04B1-4BFD-843C-61E7F77B6CC9 is a Microsoft-defined standard WMI GUID
sometimes associated with button/LED control on various laptop vendors — may be
worth investigating first if a maintainer wants to probe further.)
Full BIOS/board string: Acer Nitro ANV15-41/Sportage_RBH, BIOS V1.20,
10/23/2025
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