Headphone microphone not working on particular Dell laptops

This bug is awaiting verification that the linux-oem-5.13/5.13.0-1018.22 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

This bug was fixed in the package linux-oem-5.13 - 5.13.0-1019.23

---------------
linux-oem-5.13 (5.13.0-1019.23) focal; urgency=medium

  * focal/linux-oem-5.13: 5.13.0-1019.23 -proposed tracker (LP: #1949076)

  * Fail to detect audio output from external monitor (LP: #1948767)
    - ALSA: hda: intel: Allow repeatedly probing on codec configuration errors

  * Intel I225-IT ethernet controller: igc: probe of 0000:02:00.0 failed with
    error -1 (LP: #1945576)
    - igc: Remove _I_PHY_ID checking
    - igc: Remove phy->type checking

  * Fix Screen freeze after resume from suspend with iGPU [1002:6987]
    (LP: #1949050)
    - drm/amdgpu: reenable BACO support for 699F:C7 polaris12 SKU
    - drm/amdgpu: add missing cleanups for Polaris12 UVD/VCE on suspend
    - drm/amdgpu: Fix crash on device remove/driver unload

  * Need support of Qualcomm WCN6856 (LP: #1939528)
    - Revert "UBUNTU: SAUCE: Bluetooth: btusb: Add support using different nvm for
      variant WCN6855 controller"
    - Revert "UBUNTU: SAUCE: cfg80211: save power spectral density(psd) of
      regulatory rule"
    - Revert "UBUNTU: SAUCE: cfg80211: add definition for 6 GHz power spectral
      density(psd)"
    - Revert "UBUNTU: SAUCE: ath11k: set correct NL80211_FEATURE_DYNAMIC_SMPS for
      WCN6855"
    - Revert "mac80211: save transmit power envelope element and power constraint"
    - Revert "mac80211: add parse regulatory info in 6 GHz operation information"
    - Revert "ieee80211: add power type definition for 6 GHz"
    - Revert "mac80211: use ieee802_11_parse_elems() in ieee80211_prep_channel()"
    - Revert "mac80211: always allocate struct ieee802_11_elems"
    - Revert "mac80211: mlme: find auth challenge directly"
    - Revert "mac80211: move CRC into struct ieee802_11_elems"
    - Revert "mac80211: mesh: clean up rx_bcn_presp API"
    - Revert "ath11k: support SMPS configuration for 6 GHz"
    - Revert "ath11k: add 6 GHz params in peer assoc command"
    - Revert "ieee80211: Add new A-MPDU factor macro for HE 6 GHz peer caps"
    - Revert "ath11k: copy cap info of 6G band under WMI_HOST_WLAN_5G_CAP for
      WCN6855"
    - Revert "ath11k: enable 6G channels for WCN6855"
    - Revert "ath11k: re-enable ht_cap/vht_cap for 5G band for WCN6855"
    - Revert "ath11k: fix survey dump collection in 6 GHz"
    - Revert "ath11k: fix packet drops due to incorrect 6 GHz freq value in rx
      status"
    - Revert "ath11k: add channel 2 into 6 GHz channel list"
    - Revert "ath11k: qmi: avoid error messages when dma allocation fails"
    - Revert "mac80211: parse transmit power envelope element"
    - Revert "ieee80211: add definition for transmit power envelope element"
    - Revert "ieee80211: add definition of regulatory info in 6 GHz operation
      information"
    - Revert "mac80211: notify driver on mgd TX completion"
    - Revert "ath11k: don't call ath11k_pci_set_l1ss for WCN6855"
    - Revert "ath11k: add support for WCN6855"
    - Revert "ath11k: add support to get peer id for WCN6855"
    - Revert "ath11k: setup WBM_IDLE_LINK ring once again"
    - Revert "ath11k: setup REO for WCN6855"
    - Revert "ath11k: add dp support for WCN6855"
    - Revert "ath11k:...

came via upstream stable update

Ubuntu 21.10 (Impish Indri) has reached end of life, so this bug will not be fixed for that specific release.