Public bug reported: [ Impact ]
The internal microphone on affected Yoga Pro 7 systems records with excessive background noise when mic volume is set to 100%. The gain is stuck at the maximum level (Amp-In 0x03 / 29.25 dB), which makes hiss/static clearly audible and impacts normal audio recording use. [ Test Plan ] 1. Boot an affected Yoga Pro 7 system with the SRU kernel. 2. Set internal mic volume to 100%. 3. Record audio with the internal microphone. 4. Verify the recording no longer has excessive hiss/static and the gain no longer stays pinned at Amp-In 0x03. [ Where problems could occur ] This change affects the codec gain path, so a regression could make the internal microphone too quiet or alter input levels on related audio paths. [ Other Info ] The upstream fix is already merged in Linux kernel commit 6cd3d2c82651a9e77aa5b1b9c12aa918c0d6c0a9. https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6cd3d2c82651a9e77aa5b1b9c12aa918c0d6c0a9 ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: jira-sutton-5608 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2167571 Title: [SRU] Fix excessive internal microphone gain causing noisy recordings on Yoga Pro 7 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2167571/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
