Fix inaudible HDMI/DP audio on USB-C MST dock

[Kai-Heng Feng]

[Impact]
HDMI/DP audio isn't working on Dell's USB-C dock.

[Fix]
Leave Maud/Naud as is, since the hardware programmed the right value
already.

[Test]
HDMI/DP audio always comes out from the USB-C dock after the fix is
applied.

[Where problems could occur]
The commits affects _all_ HDMI/DP audio that connects to Intel GFX. So
all of them are affected hence the regression risk isn't low.

Therefore let the commit sits in OEM kernel first. Stable kernels can
pull in this fix after it's getting thoroughly tested.

[AceLan Kao (acelankao)]

This fix is required for the 6.5 and 6.8 kernels.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-oem-6.5/6.5.0-1024.25 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-jammy-linux-oem-6.5' to 'verification-done-jammy-linux-oem-6.5'. If the problem still exists, change the tag 'verification-needed-jammy-linux-oem-6.5' to 'verification-failed-jammy-linux-oem-6.5'.

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!

[Timo Aaltonen (tjaalton)]

please send this for noble kernel as it's required for transitioning oem-6.5 -> hwe-6.8

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux/6.8.0-38.38 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-noble-linux' to 'verification-done-noble-linux'. If the problem still exists, change the tag 'verification-needed-noble-linux' to 'verification-failed-noble-linux'.

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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-6.5 - 6.5.0-1024.25

---------------
linux-oem-6.5 (6.5.0-1024.25) jammy; urgency=medium

  * jammy/linux-oem-6.5: 6.5.0-1024.25 -proposed tracker (LP: #2063708)

  * Fix inaudible HDMI/DP audio on USB-C MST dock (LP: #2064689)
    - SAUCE: drm/i915/audio: Fix audio time stamp programming for DP

  [ Ubuntu: 6.5.0-40.40 ]

  * mantic/linux: 6.5.0-40.40 -proposed tracker (LP: #2063709)
  * [Mantic] Compile broken on armhf (cc1 out of memory) (LP: #2060446)
    - Revert "minmax: relax check to allow comparison between unsigned arguments
      and signed constants"
    - Revert "minmax: allow comparisons of 'int' against 'unsigned char/short'"
    - Revert "minmax: allow min()/max()/clamp() if the arguments have the same
      signedness."
    - Revert "minmax: add umin(a, b) and umax(a, b)"
  * Drop fips-checks script from trees (LP: #2055083)
    - [Packaging] Remove fips-checks script
  * alsa/realtek: adjust max output valume for headphone on 2 LG machines
    (LP: #2058573)
    - ALSA: hda/realtek: fix the hp playback volume issue for LG machines
  * Mantic update: upstream stable patchset 2024-03-27 (LP: #2059284)
    - asm-generic: make sparse happy with odd-sized put_unaligned_*()
    - powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
    - arm64: irq: set the correct node for VMAP stack
    - drivers/perf: pmuv3: don't expose SW_INCR event in sysfs
    - powerpc: Fix build error due to is_valid_bugaddr()
    - powerpc/mm: Fix build failures due to arch_reserved_kernel_pages()
    - powerpc/64s: Fix CONFIG_NUMA=n build due to create_section_mapping()
    - x86/boot: Ignore NMIs during very early boot
    - powerpc: pmd_move_must_withdraw() is only needed for
      CONFIG_TRANSPARENT_HUGEPAGE
    - powerpc/lib: Validate size for vector operations
    - x86/mce: Mark fatal MCE's page as poison to avoid panic in the kdump kernel
    - perf/core: Fix narrow startup race when creating the perf nr_addr_filters
      sysfs file
    - debugobjects: Stop accessing objects after releasing hash bucket lock
    - regulator: core: Only increment use_count when enable_count changes
    - audit: Send netlink ACK before setting connection in auditd_set
    - ACPI: video: Add quirk for the Colorful X15 AT 23 Laptop
    - PNP: ACPI: fix fortify warning
    - ACPI: extlog: fix NULL pointer dereference check
    - ACPI: NUMA: Fix the logic of getting the fake_pxm value
    - PM / devfreq: Synchronize devfreq_monitor_[start/stop]
    - ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous
      events
    - FS:JFS:UBSAN:array-index-out-of-bounds in dbAdjTree
    - jfs: fix array-index-out-of-bounds in dbAdjTree
    - pstore/ram: Fix crash when setting number of cpus to an odd number
    - crypto: octeontx2 - Fix cptvf driver cleanup
    - erofs: fix ztailpacking for subpage compressed blocks
    - crypto: stm32/crc32 - fix parsing list of devices
    - afs: fix the usage of read_seqbegin_or_lock() in afs_lookup_volume_rcu()
    - afs: fix the usage of read_seqbegin_or_lock() in afs_find_server*()
    - rxrpc_find_service_conn_rcu: fix the usage of read_seqbegin_or_lock()
    - jfs: ...

[Austin Esquirell (ajesquirell)]

Updating to 6.5.0-1024.25_oem from 6.5.0-1023.24_oem breaks HDMI video on the Lenovo Thunderbolt 3 Gen 2 USB-C dock. Since this is the only bugfix relating to HDMI/USB-C docks it would seem that this is the change that causes the issue.

If there are any logs or additional details I can provide, I am happy to help.

[Kai-Heng Feng (kaihengfeng)]

Austin,

Can you please file a separate bug? Thanks!

[Leopoldo Pena (leopenausa)]

I can confirm Austin report also in a Lenovo Thunderbolt 4 Gen 2 USB-C dock. Had to fall back to 6.5.0-1023.24_oem to get my external monitors to work.

Also reported bug that is now a duplicate of Austin's

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-nvidia-lowlatency/6.8.0-1009.9.1 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-noble-linux-nvidia-lowlatency' to 'verification-done-noble-linux-nvidia-lowlatency'. If the problem still exists, change the tag 'verification-needed-noble-linux-nvidia-lowlatency' to 'verification-failed-noble-linux-nvidia-lowlatency'.

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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 6.8.0-38.38

---------------
linux (6.8.0-38.38) noble; urgency=medium

  * noble/linux: 6.8.0-38.38 -proposed tracker (LP: #2068318)

  * race_sched in ubuntu_stress_smoke_test will cause kernel panic on 6.8 with
    Azure Standard_A2_v2 instance (LP: #2068024)
    - sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()

  * Noble: btrfs: re-introduce 'norecovery' mount option (LP: #2068591)
    - btrfs: re-introduce 'norecovery' mount option

  * Fix system hang while entering suspend with AMD Navi3x graphics
    (LP: #2063417)
    - drm/amdgpu/mes: fix use-after-free issue

  * Noble update: v6.8.8 upstream stable release (LP: #2068087)
    - io_uring: Fix io_cqring_wait() not restoring sigmask on get_timespec64()
      failure
    - drm/i915/cdclk: Fix voltage_level programming edge case
    - Revert "vmgenid: emit uevent when VMGENID updates"
    - SUNRPC: Fix rpcgss_context trace event acceptor field
    - selftests/ftrace: Limit length in subsystem-enable tests
    - random: handle creditable entropy from atomic process context
    - scsi: core: Fix handling of SCMD_FAIL_IF_RECOVERING
    - net: usb: ax88179_178a: avoid writing the mac address before first reading
    - btrfs: do not wait for short bulk allocation
    - btrfs: zoned: do not flag ZEROOUT on non-dirty extent buffer
    - r8169: fix LED-related deadlock on module removal
    - r8169: add missing conditional compiling for call to r8169_remove_leds
    - scsi: ufs: qcom: Add missing interconnect bandwidth values for Gear 5
    - netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get()
    - netfilter: nf_tables: Fix potential data-race in __nft_obj_type_get()
    - netfilter: br_netfilter: skip conntrack input hook for promisc packets
    - netfilter: nft_set_pipapo: constify lookup fn args where possible
    - netfilter: nft_set_pipapo: walk over current view on netlink dump
    - netfilter: flowtable: validate pppoe header
    - netfilter: flowtable: incorrect pppoe tuple
    - af_unix: Call manage_oob() for every skb in unix_stream_read_generic().
    - af_unix: Don't peek OOB data without MSG_OOB.
    - net: sparx5: flower: fix fragment flags handling
    - net/mlx5: Lag, restore buckets number to default after hash LAG deactivation
    - net/mlx5: Restore mistakenly dropped parts in register devlink flow
    - net/mlx5e: Prevent deadlock while disabling aRFS
    - net: change maximum number of UDP segments to 128
    - octeontx2-pf: fix FLOW_DIS_IS_FRAGMENT implementation
    - selftests/tcp_ao: Make RST tests less flaky
    - selftests/tcp_ao: Zero-init tcp_ao_info_opt
    - selftests/tcp_ao: Fix fscanf() call for format-security
    - selftests/tcp_ao: Printing fixes to confirm with format-security
    - net: stmmac: Apply half-duplex-less constraint for DW QoS Eth only
    - net: stmmac: Fix max-speed being ignored on queue re-init
    - net: stmmac: Fix IP-cores specific MAC capabilities
    - ice: tc: check src_vsi in case of traffic from VF
    - ice: tc: allow zero flags in parsing tc flower
    - ice: Fix checking for unsupported keys on non-tunnel device
    - tun: limit printing rate whe...

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-gke/6.8.0-1006.9 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-noble-linux-gke' to 'verification-done-noble-linux-gke'. If the problem still exists, change the tag 'verification-needed-noble-linux-gke' to 'verification-failed-noble-linux-gke'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-nvidia/6.8.0-1009.9 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-noble-linux-nvidia' to 'verification-done-noble-linux-nvidia'. If the problem still exists, change the tag 'verification-needed-noble-linux-nvidia' to 'verification-failed-noble-linux-nvidia'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-ibm/6.8.0-1008.8 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-noble-linux-ibm' to 'verification-done-noble-linux-ibm'. If the problem still exists, change the tag 'verification-needed-noble-linux-ibm' to 'verification-failed-noble-linux-ibm'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-hwe-6.8/6.8.0-38.38~22.04.1 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-jammy-linux-hwe-6.8' to 'verification-done-jammy-linux-hwe-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-hwe-6.8' to 'verification-failed-jammy-linux-hwe-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-azure-6.8/6.8.0-1010.10~22.04.1 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-jammy-linux-azure-6.8' to 'verification-done-jammy-linux-azure-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-azure-6.8' to 'verification-failed-jammy-linux-azure-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-lowlatency-hwe-6.8/6.8.0-38.38.1~22.04.2 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-jammy-linux-lowlatency-hwe-6.8' to 'verification-done-jammy-linux-lowlatency-hwe-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-lowlatency-hwe-6.8' to 'verification-failed-jammy-linux-lowlatency-hwe-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-raspi-realtime/6.8.0-2006.6 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-noble-linux-raspi-realtime' to 'verification-done-noble-linux-raspi-realtime'. If the problem still exists, change the tag 'verification-needed-noble-linux-raspi-realtime' to 'verification-failed-noble-linux-raspi-realtime'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-ibm-6.8/6.8.0-1008.8~22.04.1 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-jammy-linux-ibm-6.8' to 'verification-done-jammy-linux-ibm-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-ibm-6.8' to 'verification-failed-jammy-linux-ibm-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-aws-6.8/6.8.0-1011.12~22.04.1 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-jammy-linux-aws-6.8' to 'verification-done-jammy-linux-aws-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-aws-6.8' to 'verification-failed-jammy-linux-aws-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-nvidia-6.8/6.8.0-1009.9~22.04.1 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-jammy-linux-nvidia-6.8' to 'verification-done-jammy-linux-nvidia-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-nvidia-6.8' to 'verification-failed-jammy-linux-nvidia-6.8'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-riscv/6.8.0-38.38.1 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-noble-linux-riscv' to 'verification-done-noble-linux-riscv'. If the problem still exists, change the tag 'verification-needed-noble-linux-riscv' to 'verification-failed-noble-linux-riscv'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-oracle/6.8.0-1008.8 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-noble-linux-oracle' to 'verification-done-noble-linux-oracle'. If the problem still exists, change the tag 'verification-needed-noble-linux-oracle' to 'verification-failed-noble-linux-oracle'.

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!

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-riscv-6.8/6.8.0-38.38.1~22.04.1 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-jammy-linux-riscv-6.8' to 'verification-done-jammy-linux-riscv-6.8'. If the problem still exists, change the tag 'verification-needed-jammy-linux-riscv-6.8' to 'verification-failed-jammy-linux-riscv-6.8'.

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!