This bug was fixed in the package linux-oem-5.6 - 5.6.0-1028.28
---------------
linux-oem-5.6 (5.6.0-1028.28) focal; urgency=medium
* focal/linux-oem-5.6: 5.6.0-1028.28 -proposed tracker (LP: #1894630)
* Cannot probe sata disk on sata controller behind VMD: ata1.00: failed to
IDENTIFY (I/O error, err_mask=0x4) (LP: #1894778)
- SAUCE: PCI: vmd: Add AHCI to fast interrupt list
* SRU: Fix system hang when stress S3 on radeon with TTM (LP: #1893609)
- mei: bus: don't clean driver pointer
* Packaging resync (LP: #1786013)
- [Packaging] update helper scripts
- update dkms package versions
* Introduce the new NVIDIA 450-server and the 450 UDA series (LP: #1887674)
- [packaging] add signed modules for the 450 nvidia driver
* CVE-2020-12888
- vfio/type1: Support faulting PFNMAP vmas
- vfio-pci: Fault mmaps to enable vma tracking
- vfio-pci: Invalidate mmaps and block MMIO access on disabled memory
* Missing id 8086:a0bc for VMD quirk PCI_DEV_FLAGS_ENABLE_ASPM (LP: #1893194)
- SAUCE: PCI/ASPM: VMD: add ASPM quirk for 8086:a0bc
* The DP/HDMI audio via USB-C to DP dongle or Dell Zeus adapter can't work
after suspend (LP: #1893290)
- ALSA: hda/hdmi: always check pin power status in i915 pin fixup
* Comet Lake PCH-H RAID not support on Ubuntu20.04 (LP: #1892288)
- ahci: Add Intel Comet Lake PCH-H PCI ID
* device doesn't boot with kernel older than v5.7.7 on a usb key: hang at
efi_tpm_eventlog_init (LP: #1892827)
- efi/tpm: Verify event log header before parsing
-- Timo Aaltonen <timo.aalto...@canonical.com> Tue, 08 Sep 2020
11:40:14 +0300
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-12888
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https://bugs.launchpad.net/bugs/1893290
Title:
The DP/HDMI audio via USB-C to DP dongle or Dell Zeus adapter can't
work after suspend
Status in HWE Next:
New
Status in linux-oem-5.6 package in Ubuntu:
Fix Committed
Status in linux-oem-5.6 source package in Focal:
Fix Released
Bug description:
Since this patch is CCed to stable kernel, I just sent this patch
to oem-5.6 kernel, our oem project is waiting for this patch to
be landed to oem-5.6 kernel first.
[Impact]
On the Dell TGL laptop, if connecting a monitor via type-c to DP/HDMI
adapter, we will have an audio issue, that is playing the music and
suspend the system, after resuming back, the audio can't output from
DP/HDMI monitor anymore.
[Fix]
Cherry-pick a fix from upstream, this patch is verifying the needed
converter and pin to be in the D0 state.
[Test Case]
Connect a monitor with USB-C to DP/HDMI adapter, open the youtu.com
and playing sth, suspend the system and resume, check if the sound
could play the music, repeat 20 times, all work very well.
[Regression Risk]
If this patch could introduce regression, it should be the power
consumption regression on Intel HDMI audio, since it makes the
converter and pin to be D0 state earlier than before. But this
impact is very small. one converter and one pin consume very little
power.
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