This bug was fixed in the package linux-oem-5.6 - 5.6.0-1035.37
---------------
linux-oem-5.6 (5.6.0-1035.37) focal; urgency=medium
* focal/linux-oem-5.6: 5.6.0-1035.37 -proposed tracker (LP: #1903149)
* Packaging resync (LP: #1786013)
- update dkms package versions
* drm/i915/dp_mst - wait longer during the clock recovery for Display port
(LP: #1902861)
- SAUCE: drm/i915/dp_mst: wait longer during the clock recovery
* Remove NVMe suspend-to-idle workaround (LP: #1897227)
- Revert "UBUTU: SAUCE: pci: prevent Intel NVMe SSDPEKKF from entering D3"
- Revert "UBUNTU: SAUCE: pci: prevent sk hynix nvme from entering D3"
* Tiger Lake PMC core driver fixes (LP: #1899883)
- x86/devicetable: Move x86 specific macro out of generic code
- x86/cpu: Add consistent CPU match macros
- platform/x86: Convert to new CPU match macros
- platform/x86: intel_pmc_core: Add Atom based Jasper Lake (JSL) platform
support
- platform/x86: intel_pmc_core: Add debugfs entry to access sub-state
residencies
- platform/x86: intel_pmc_core: Add debugfs entry for low power mode status
registers
- platform/x86: intel_pmc_core: Refactor the driver by removing redundant
code
- platform/x86: intel_pmc_core: Remove slp_s0 attributes from tgl_reg_map
- platform/x86: intel_pmc_core: Add an additional parameter to
pmc_core_lpm_display()
- platform/x86: intel_pmc_core: Dump low power status registers on an S0ix.y
failure
- platform/x86: intel_pmc_core: Add debugfs support to access live status
registers
- platform/x86: intel_pmc_core: Relocate pmc_core_*_display() to outside of
CONFIG_DEBUG_FS
- platform/x86: intel_pmc_core: Remove duplicate 'if' to create debugfs
entry
- platform/x86: intel_pmc_core: Add slp_s0_offset attribute back to
tgl_reg_map
- platform/x86: intel_pmc_core: Make pmc_core_lpm_display() generic for
platforms that support sub-states
- platform/x86: intel_pmc_core: Make pmc_core_substate_res_show() generic
- platform/x86: intel_pmc_core: Change Jasper Lake S0ix debug reg map back
to
ICL
- platform/x86: intel_pmc_core: avoid unused-function warnings
- platform/x86: intel_pmc_core: update TGL's LPM0 reg bit map name
- platform/x86: intel_pmc_core: fix bound check in pmc_core_mphy_pg_show()
- platform/x86: pmc_core: Use descriptive names for LPM registers
- platform/x86: intel_pmc_core: Fix TigerLake power gating status map
- platform/x86: intel_pmc_core: Fix the slp_s0 counter displayed value
* [SRU][OEM-5.6]Fix no video out from some monitors on amdgpu (LP: #1901135)
- drm/amd/display: Retry AUX write when fail occurs
* drm/i915/dp_mst - only read the base capability in DPCD. (LP: #1902613)
- Revert "UBUNTU: SAUCE: drm/dp_mst: Retrieve extended DPCD caps for
topology
manager"
* TGL system automatically resumes from s2idle when connecting to a docking
station with a monitor (LP: #1902577)
- SAUCE: ACPI: avoid auto-wakeup with an _OSI string
* Fix non-working NVMe after S3 (LP: #1895718)
- SAUCE: PCI: Enable ACS quirk on all CML root ports
* drm/i915/dp_mst - System would hang during the boot up. (LP: #1902469)
- drm/i915: Fix encoder lookup during PSR atomic check
* kci_test_encap_fou() in rtnetlink.sh from kselftests/net failed with "FAIL:
can't add fou port 7777, skipping test" (LP: #1891421)
- selftests: rtnetlink: load fou module for kci_test_encap_fou() test
* alsa/hda: mic can't be detect if booting with headset plugged on a HP
machine (LP: #1901971)
- SAUCE: ALSA: hda/realtek - Fixed HP headset Mic can't be detected
-- Timo Aaltonen <timo.aalto...@canonical.com> Wed, 11 Nov 2020
14:40:51 +0200
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: Fix Committed => Fix Released
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Packages, which is subscribed to linux-oem-5.6 in Ubuntu.
https://bugs.launchpad.net/bugs/1902613
Title:
drm/i915/dp_mst - only read the base capability in DPCD.
Status in HWE Next:
New
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux-oem-5.6 source package in Focal:
Fix Released
Bug description:
[Impact]
Currently DRM driver assume the source device caps is higher than the MST
device
caps. With this commit, the statement would be broken.
e.g. the source device only support DP1.2 and the mst device support
DP1.4.
The source device can't output the video to the external monitor on
the docking station.
[Fix]
Revert the previous patch and only read the base capability from DPCD.
[test]
With the patch, The machine(DP1.2) connect with the external monitor on
docking station(SC) and
can output the video to the external monitor on docking station(SC-DP1.4).
[Regression Potential]
Can't output 4k@60hz on the docking station(SC).
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