The problem is very old, nobody solved it ;( This post from 2014 talk about similar whistling in headphones
https://askubuntu.com/questions/457910/strange-noise-in-headphones-when- no-sound-is-played The solution Below does not work well : " Got the same problem on Dell XPS15 (9550, 2015 model in Xenial). Solved it in alsamixer and muting the loopback channel. $ alsamixer Navigating to loopback (all the way to the right, with → key) and setting it to Disabled using Mthe ↑ key. " With Loopback Enable the whistling is his acute, with Loopback Disable the song is low-pitched. This is clearly Realtek ALC3266 driver problem... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1841485 Title: Unbearable whistling in headphones To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1841485/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
