[Bug 2155235] Re: Intel i915 eDP-1 "Failed to enable link training" after suspend on Alder Lake

Hi, Could you run this command and provide the result? sudo cat /sys/class/drm/card1-eDP-1/edid | od -A x -t x1z | head -3 BR An -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2155235 Title: Intel i915 eDP-1 "Failed to enable link training" after suspend on Alder Lake Status in linux package in Ubuntu: New Bug description: After resume from suspend, the internal laptop monitor (eDP-1) stays black while the external HDMI monitor turns on. The logs show: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:507:eDP-1][ENCODER:506:DDI A/PHY A][DPRX] Failed to enable link training . Workaround that helps: adding i915.enable_psr=0 i915.enable_dc=0 to kernel parameters. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-22-generic 7.0.0-22.22 ProcVersionSignature: Ubuntu 7.0.0-22.22-generic 7.0.0 Uname: Linux 7.0.0-22-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Jun 4 14:28:23 2026 InstallationDate: Installed on 2026-04-27 (38 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp4s0Link: Not connected. MachineType: HP Victus by HP Gaming Laptop 15-fa0xxx ProcFB: 0 i915drmfb 1 nvidia-drmdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-22-generic root=UUID=efc1b9e5-9810-4f5d-b2b3-d4ebbe04d955 ro quiet splash i915.enable_psr=0 i915.enable_dc=0 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/22/2025 dmi.bios.release: 15.31 dmi.bios.vendor: AMI dmi.bios.version: F.31 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 8A4F dmi.board.vendor: HP dmi.board.version: 37.56 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 37.56 dmi.modalias: dmi:bvnAMI:bvrF.31:bd04/22/2025:br15.31:efr37.56:svnHP:pnVictusbyHPGamingLaptop15-fa0xxx:pvr:rvnHP:rn8A4F:rvr37.56:cvnHP:ct10:cvrChassisVersion:sku6X7N4EA#UUQ:pfa103C_5335M7HPVictus: dmi.product.family: 103C_5335M7 HP Victus dmi.product.name: Victus by HP Gaming Laptop 15-fa0xxx dmi.product.sku: 6X7N4EA#UUQ dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2155235/+subscriptions