The panel get blank for too long after disconnecting dock with monitors

[Chris Chiu]

[Impact]
Connect 2 or more external monitors via type-C docking station, the dp-mst function is working correctly. However, after unplugging the docking station, the internal display seems to freeze for more than 5 seconds to get back with normal display.

[Fix]
Intel release a fix to abort the DP AUX transfer on a disconnected TC port. It prevent the DP to stuck in a unexpected long retry.

[Test]
Connect external monitors to the type-C port on the system. Make sure external monitor display OK then unplug the dock. The internal panel should not stay in blank for more than 10 seconds.

[Where problems could occur]
The long AUX transfer timeout and retry are meaningless on a disconnected sink. Should be no risk for regression.

[Timo Aaltonen (tjaalton)]

this doesn't seem to be upstream yet

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

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 2013114

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

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

This bug is awaiting verification that the linux-oem-6.1/6.1.0-1009.9 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-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.

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-6.1 - 6.1.0-1009.9

---------------
linux-oem-6.1 (6.1.0-1009.9) jammy; urgency=medium

  * jammy/linux-oem-6.1: 6.1.0-1009.9 -proposed tracker (LP: #2011921)

  * Fix spurious wakeup from S5 when TBT dock is plugged (LP: #2012846)
    - ACPICA: MADT: Add loong_arch-specific APICs support
    - ACPICA: Events: Support fixed PCIe wake event

  * The panel get blank for too long after disconnecting dock with monitors
    (LP: #2013114)
    - drm/i915/tc: Abort DP AUX transfer on a disconnected TC port

  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2023.03.20)

  * Jammy update: v6.1.22 upstream stable release (LP: #2013346)
    - interconnect: qcom: osm-l3: fix icc_onecell_data allocation
    - interconnect: qcom: sm8450: switch to qcom_icc_rpmh_* function
    - interconnect: qcom: qcm2290: Fix MASTER_SNOC_BIMC_NRT
    - perf/core: Fix perf_output_begin parameter is incorrectly invoked in
      perf_event_bpf_output
    - perf: fix perf_event_context->time
    - tracing/hwlat: Replace sched_setaffinity with set_cpus_allowed_ptr
    - drm/amd/display: Include virtual signal to set k1 and k2 values
    - drm/amd/display: fix k1 k2 divider programming for phantom streams
    - drm/amd/display: Remove OTG DIV register write for Virtual signals.
    - mptcp: refactor passive socket initialization
    - mptcp: use the workqueue to destroy unaccepted sockets
    - mptcp: fix UaF in listener shutdown
    - drm/amd/display: Fix DP MST sinks removal issue
    - arm64: dts: qcom: sm8450: Mark UFS controller as cache coherent
    - power: supply: bq24190: Fix use after free bug in bq24190_remove due to race
      condition
    - power: supply: da9150: Fix use after free bug in da9150_charger_remove due
      to race condition
    - arm64: dts: imx8dxl-evk: Disable hibernation mode of AR8031 for EQOS
    - arm64: dts: imx8dxl-evk: Fix eqos phy reset gpio
    - ARM: dts: imx6sll: e70k02: fix usbotg1 pinctrl
    - ARM: dts: imx6sll: e60k02: fix usbotg1 pinctrl
    - ARM: dts: imx6sl: tolino-shine2hd: fix usbotg1 pinctrl
    - arm64: dts: imx8mn: specify #sound-dai-cells for SAI nodes
    - arm64: dts: imx93: add missing #address-cells and #size-cells to i2c nodes
    - NFS: Fix /proc/PID/io read_bytes for buffered reads
    - xsk: Add missing overflow check in xdp_umem_reg
    - iavf: fix inverted Rx hash condition leading to disabled hash
    - iavf: fix non-tunneled IPv6 UDP packet type and hashing
    - iavf: do not track VLAN 0 filters
    - intel/igbvf: free irq on the error path in igbvf_request_msix()
    - igbvf: Regard vf reset nack as success
    - igc: fix the validation logic for taprio's gate list
    - i2c: imx-lpi2c: check only for enabled interrupt flags
    - i2c: mxs: ensure that DMA buffers are safe for DMA
    - i2c: hisi: Only use the completion interrupt to finish the transfer
    - scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate()
    - nfsd: don't replace page in rq_pages if it's a continuation of last page
    - net: dsa: b53: mmap: fix device tree support
    - net: usb: smsc95xx: Limit packet length to skb->len
    - efi/li...