@David For BeiJing site, the external mic works on new received Lenovo ThinkPad X240. Upload the alsa-info log. The sound with a little buzzing when dumping alsa-info.
more info: Machine information: Test image: Stock Ubuntu 14.04 BIOS Version: GIET60WW (2.10 ) Audio cards: 00:03.0 Audio device [0403]: Intel Corporation Device [8086:0a0c] (rev 09) 00:1b.0 Audio device [0403]: Intel Corporation Device [8086:9c20] (rev 04) Codec: Realtek ALC292 Headset: philips shm7110 #uname -a Linux u-ThinkPad-X240 3.13.0-46-generic #77-Ubuntu SMP Mon Mar 2 18:23:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux #dpkg -l |grep -oem ii oem-audio-hda-daily-dkms 0.201503011031~ubuntu14.04.1 all HDA driver in DKMS format. #cat /sys/module/snd_hda_codec/parameters/dump_coef 1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1414706 Title: [20ALCTO1WW, Realtek ALC292, Black Mic, Left][Lenovo ThinkPad X240] external mic has no sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1414706/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
