[Bug 2157590] [NEW] Mic Mute LED not working on HP Laptop 15-fc0xxx (Board 8B2F) / Realtek ALC236

Public bug reported: Hello, I am running Ubuntu 26.04 on an HP Laptop 15-fc0xxx (Ryzen 3 7320U platform) and the physical microphone mute LED (on the F8 key) does not toggle or illuminate when the mic mute hotkey is pressed, even though the software mutes correctly. The standard 'hda::micmute' node is entirely missing from /sys/class/leds/. Here are the system details gathered from troubleshooting: - OS: Ubuntu 26.04 LTS - Kernel: 7.0.0-22-generic - Audio Codec: Realtek ALC236 (Subsystem Id: 0x103c8b2f) - Board ID: HP 8B2F (SKU: 946T5EA#UUG) Testing with evtest shows that 'HP WMI hotkeys' successfully registers EV_KEY / KEY_MICMUTE (code 248) on keypress, but the corresponding LED is not hooked up via the hp-wmi driver for this specific motherboard revision. Please consider adding a quirk mapping for Subsystem 0x103c8b2f / Board 8B2F to enable the mic mute LED trigger. Thank you! ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: 26.04 alc236 alsa-driver amd-acp hp-wmi micmute-led ** Tags added: 26.04 alc236 alsa-driver hp-wmi micmute-led -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2157590 Title: Mic Mute LED not working on HP Laptop 15-fc0xxx (Board 8B2F) / Realtek ALC236 Status in linux package in Ubuntu: New Bug description: Hello, I am running Ubuntu 26.04 on an HP Laptop 15-fc0xxx (Ryzen 3 7320U platform) and the physical microphone mute LED (on the F8 key) does not toggle or illuminate when the mic mute hotkey is pressed, even though the software mutes correctly. The standard 'hda::micmute' node is entirely missing from /sys/class/leds/. Here are the system details gathered from troubleshooting: - OS: Ubuntu 26.04 LTS - Kernel: 7.0.0-22-generic - Audio Codec: Realtek ALC236 (Subsystem Id: 0x103c8b2f) - Board ID: HP 8B2F (SKU: 946T5EA#UUG) Testing with evtest shows that 'HP WMI hotkeys' successfully registers EV_KEY / KEY_MICMUTE (code 248) on keypress, but the corresponding LED is not hooked up via the hp-wmi driver for this specific motherboard revision. Please consider adding a quirk mapping for Subsystem 0x103c8b2f / Board 8B2F to enable the mic mute LED trigger. Thank you! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2157590/+subscriptions