NOTE: I am NOT the originator of this bug report, but have a similar(? identical?) problem.
My machine is an Acer Aspire E17 E5-722-425Q, and the built-in microphone (and also the mouse pad) has never(?) been detected. (Since I use a USB mouse and a USB headset-with-microphone, neither problem has ever bothered me in the slightest.) Sometimes, the built-in WiFi is not detected (as is the case at the moment), and, usually, the built-in Bluetooth is not detected (also the case at the moment). However, I *have* observed that, at least in the case of the WiFi (the Bluetooth is not-so-clear) it seems to be related to the temperature (especially the external (ambient, i.e., room temperature)). Whilst no measurements have been made, if the ambient temperature is sufficiently cool (cold, actually, PROBABLY less than 10 degrees Celsius (estimated)), the WiFi is frequently detected. When it is warm, it is much more hit-and-miss. (There are some circumstantial reasons to think, for both the WiFi and Bluetooth (both are USB), that if there certain unclear external USB devices are also attached when the system is booted, than one or both is detected. Apologies for being quite vague here, I have never tried to confirm or characterise this incidental observation.) Attached is the RAW report generated by apport-cli(1); I do not know how to automagically append it to a bug which I did not originally create. However, please note that, at the moment, neither the built-in USB WiFi nor the built-in USB Bluetooth is currently detected (and the ambient temperature is currently quite warm). ** Attachment added: "1869062" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869062/+attachment/5341699/+files/1869062 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869062 Title: Acer Aspire 7715 microphone not detected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869062/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs