Thank you for the quick response and for linking to bug #2156867. I have tested the fix on my Lenovo ThinkPad X1 Carbon Gen 10 (21CCS9K500) with kernel 7.0.0-38-generic and linux-firmware-misc 20260319.git217ca6e4-0ubuntu2.2.
Please note that my hardware is different from the Lenovo Yoga Pro 7 referenced in bug #2156867 — my system uses an Intel Alder Lake processor, not AMD. After the fix, I noticed a partial improvement: `hda codecs found, mask 5` now appears in dmesg after the first reboot, which is an improvement over the previous `mask 4`. However, internal speakers are still not available in `aplay -l` after the first reboot. After disconnecting and reconnecting the ThinkPad Thunderbolt 3 Dock (which sometimes causes monitor recognition issues), and then performing a second reboot, audio works correctly — HDA Analog appears in `aplay -l` and internal speakers function properly. It is possible that the dock reconnection triggers a hardware reinitialization that helps the audio codec initialize correctly. This behavior with the dock was also present before this fix. The issue is not fully resolved for the ThinkPad X1 Carbon Gen 10 — it requires specific conditions (dock reconnection + second reboot) to work reliably. --- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2170869 Title: ThinkPad X1 Carbon Gen 10 (ALC287) - audio codec not initialized at boot, "Dummy Output" issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2170869/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
