[EHL] Screen flickering when the setup is in multiple monitors with mirror mode output

[Jian Hui Lee]

[Summary]
Display is flickering in Mirror mode and below 30 Hz refresh rate
[Steps to reproduce]
1. Install Ubuntu Desktop 22.04.2
2. Boot to desktop
3. Connect 2 FHD monitors to DP ports and HDMI port
4. Change to Mirror Mode.
5. Change back to Joint Mode and change refresh rate to 30 Hz (or below)

[Expected result]
1. Display on both DP and HDMI show correctly on Mirror mode
2. Display on both DP and HDMI show correctly on refresh rate below 30Hz

[Actual result]
1. Display Flicker on display in Mirror Mode.
2. Display Flicker on display when select 30 Hz on refresh rate

[Failure rate]
100%

[Additional information]
bios-version: V1.11
CPU: Intel(R) Celeron(R) N6210 @ 1.20GHz (Elkhart Lake)
GPU: 00:02.0 VGA compatible controller: Intel Corporation Device 4555 (rev 01)
kernel-version: 5.15.0-1027-intel-iotg

Note:
Single mode does not have this issue.

LP: #2020412
LP: #2031056

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

This bug is awaiting verification that the linux-intel-iotg/5.15.0-1039.45 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-intel-iotg' to 'verification-done-jammy-linux-intel-iotg'. If the problem still exists, change the tag 'verification-needed-jammy-linux-intel-iotg' to 'verification-failed-jammy-linux-intel-iotg'.

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!

[Jian Hui Lee (jianhuilee)]

customer verified 5.15.0-1039.45 kernel in -proposed and solved their issue.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-intel-iotg - 5.15.0-1039.45

---------------
linux-intel-iotg (5.15.0-1039.45) jammy; urgency=medium

  * jammy/linux-intel-iotg: 5.15.0-1039.45 -proposed tracker (LP: #2030409)

  * [EHL] Screen flickering when the setup is in multiple monitors with mirror
    mode output (LP: #2031057)
    - SAUCE: (no-up) drm/i915/display : Remove support for interlace mode

  * [ADL-N][RPL-S] support ISHTP module (LP: #2029328)
    - HID: intel-ish-hid: ipc: add ADL and RPL device id
    - HID: intel-ish-hid: ipc: Specify no cache snooping on TGL and ADL
    - HID: intel-ish-hid: ipc: use time_before to replace "jiffies < a"
    - HID: intel-ish-hid: Fix kernel panic during warm reset

  [ Ubuntu: 5.15.0-83.92 ]

  * jammy/linux: 5.15.0-83.92 -proposed tracker (LP: #2031132)
  * libgnutls report "trap invalid opcode" when trying to install packages over
    https (LP: #2031093)
    - [Config]: disable CONFIG_GDS_FORCE_MITIGATION

  [ Ubuntu: 5.15.0-81.90 ]

  * jammy/linux: 5.15.0-81.90 -proposed tracker (LP: #2030422)
  * Packaging resync (LP: #1786013)
    - [Packaging] resync update-dkms-versions helper
    - [Packaging] resync getabis
    - debian/dkms-versions -- update from kernel-versions (main/2023.08.07)
  * CVE-2022-40982
    - x86/mm: Initialize text poking earlier
    - x86/mm: fix poking_init() for Xen PV guests
    - x86/mm: Use mm_alloc() in poking_init()
    - mm: Move mm_cachep initialization to mm_init()
    - init: Provide arch_cpu_finalize_init()
    - x86/cpu: Switch to arch_cpu_finalize_init()
    - ARM: cpu: Switch to arch_cpu_finalize_init()
    - sparc/cpu: Switch to arch_cpu_finalize_init()
    - um/cpu: Switch to arch_cpu_finalize_init()
    - init: Remove check_bugs() leftovers
    - init: Invoke arch_cpu_finalize_init() earlier
    - init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init()
    - x86/init: Initialize signal frame size late
    - x86/fpu: Remove cpuinfo argument from init functions
    - x86/fpu: Mark init functions __init
    - x86/fpu: Move FPU initialization into arch_cpu_finalize_init()
    - x86/xen: Fix secondary processors' FPU initialization
    - x86/speculation: Add Gather Data Sampling mitigation
    - x86/speculation: Add force option to GDS mitigation
    - x86/speculation: Add Kconfig option for GDS
    - KVM: Add GDS_NO support to KVM
    - Documentation/x86: Fix backwards on/off logic about YMM support
    - [Config]: Enable CONFIG_ARCH_HAS_CPU_FINALIZE_INIT and
      CONFIG_GDS_FORCE_MITIGATION
  * CVE-2023-3609
    - net/sched: cls_u32: Fix reference counter leak leading to overflow
  * CVE-2023-21400
    - io_uring: ensure IOPOLL locks around deferred work
  * CVE-2023-4015
    - netfilter: nf_tables: add NFT_TRANS_PREPARE_ERROR to deal with bound
      set/chain
    - netfilter: nf_tables: unbind non-anonymous set if rule construction fails
    - netfilter: nf_tables: skip immediate deactivate in _PREPARE_ERROR
  * CVE-2023-3995
    - netfilter: nf_tables: disallow rule addition to bound chain via
      NFTA_RULE_CHAIN_ID
  * CVE-2023-3777
    - netfilter: nf_tables: skip bound chain on rule flush
  * losetup with mknod fails on jammy with kerne...