I've seen this same issue on another laptop (Dell m3800) and was hoping it was hardware related but it's not apparently. I believe it's related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779.
I will attempt to test the upstream kernel but before I do are there any instructions for reverting back once the test is complete? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1645876 Title: *ERROR* CPU pipe A and B FIFO underrun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1645876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
