lenovo x260: display cuts out randomly

Display output randomly drops for a second or so every so often; thought this might be a faulty cable however reverting to the 5.13 kernel resolved the issue - updated to the latest 5.15 update and issue re-occurs so unlikely to be the DP cable.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-18-generic 5.15.0-18.18
ProcVersionSignature: Ubuntu 5.15.0-18.18-generic 5.15.12
Uname: Linux 5.15.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu76
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 3 10:03:25 2022
InstallationDate: Installed on 2018-10-18 (1203 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: LENOVO 20F6CTO1WW
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-18-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-18-generic N/A
 linux-backports-modules-5.15.0-18-generic N/A
 linux-firmware 20220124.git0c6a7b3b-0ubuntu1
SourcePackage: linux
UpgradeStatus: Upgraded to jammy on 2021-05-12 (266 days ago)
dmi.bios.date: 01/28/2019
dmi.bios.release: 1.43
dmi.bios.vendor: LENOVO
dmi.bios.version: R02ET70W (1.43 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20F6CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.12
dmi.modalias: dmi:bvnLENOVO:bvrR02ET70W(1.43):bd01/28/2019:br1.43:efr1.12:svnLENOVO:pn20F6CTO1WW:pvrThinkPadX260:rvnLENOVO:rn20F6CTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20F6_BU_Think_FM_ThinkPadX260:
dmi.product.family: ThinkPad X260
dmi.product.name: 20F6CTO1WW
dmi.product.sku: LENOVO_MT_20F6_BU_Think_FM_ThinkPad X260
dmi.product.version: ThinkPad X260
dmi.sys.vendor: LENOVO