Public bug reported: [Impact] Dell Pro QCM1255 and Dell Pro Micro QCM1255 systems have headphone pop noise when using Pipewire audio server on Ubuntu 24.04. The noise appears when headphones are plugged in. The issue does not occur with Pulseaudio.
[Fix] Add a quirk for Dell Pro QCM1255 (PCI ID 0x1028, 0x0e6b) and Dell Pro Micro QCM1255 (PCI ID 0x1028, 0x0e6d) to route headphone output to DAC 0x2, which eliminates the popping sound. The fix uses the existing `alc285_fixup_invalidate_dacs` function. Upstream commit: 97272a5704bf in tiwai/sound tree, targeting v7.2-rc2. Link: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=97272a5704bf13369bba43951ad9fe8f806ccc7f [Test Plan] 1. Boot Dell Pro QCM1255 or Dell Pro Micro QCM1255 with Ubuntu 24.04 and Pipewire audio server 2. Plug in headphones 3. Without patch: popping/crackling noise heard through headphones 4. With patch: no popping noise, clean audio output [Where problems could occur] Only take effect on particular SSIDs. The risk of regression should be low ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: New ** Affects: linux (Ubuntu Noble) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.17 (Ubuntu Noble) Importance: Undecided Status: In Progress ** Affects: linux (Ubuntu Resolute) Importance: Undecided Status: In Progress ** Affects: linux-oem-6.17 (Ubuntu Resolute) Importance: Undecided Status: Invalid ** Tags: jira-wtn-435 oem-priority wtn ** Also affects: linux-oem-6.17 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Resolute) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu Resolute) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-oem-6.17 (Ubuntu Noble) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Noble) Status: New => Invalid ** Changed in: linux (Ubuntu Resolute) Status: New => In Progress ** Changed in: linux-oem-6.17 (Ubuntu Resolute) Status: New => Invalid ** Changed in: linux-oem-6.17 (Ubuntu Noble) Status: New => In Progress ** Summary changed: - Fix noise of audio output on Dell_Pro_QCM1255 after reboot + Fix noise of audio output on Dell Pro QCM1255 after reboot ** Tags added: jira-wtn-435 oem-priority wtn -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2160666 Title: Fix noise of audio output on Dell Pro QCM1255 after reboot To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2160666/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
