Public bug reported:
Title: i915: eDP panel disabled at boot / black screen after suspend on HP x360
(Raptor Lake-P, 8086:a7a1) — PPS vdd_wakeref WARN; xe driver works
On Ubuntu 26.04, kernel 7.0.0-27-generic, HP Spectre/Envy x360 (Intel Core i7
Raptor Lake-P, Iris Xe, PCI 8086:a7a1, subsystem HP 103c:8ba2), the internal
eDP panel stays black after resume from s2idle suspend. External USB-C monitor
works, system is otherwise fully functional. In some boots the panel is
disabled at boot time with: [ENCODER:515:DDI B/PHY B] failed to retrieve link
info, disabling eDP.
dmesg shows a WARNING in the panel power sequencing path:
drm_WARN_ON(intel_dp->pps.vdd_wakeref) at intel_pps_vdd_on_unlocked
(drivers/gpu/drm/i915/display/intel_pps.c:762), triggered from intel_dp_detect
during probe.
Not fixed by: i915.enable_psr=0, i915.enable_dc=0. Forcing
mem_sleep_default=deep hangs the machine entirely (firmware advertises S3 but
it's broken; platform is Modern Standby/s2idle).
Workaround that fully fixes it: booting with i915.force_probe=!a7a1
xe.force_probe=a7a1 — under the xe driver, the panel initializes and resumes
correctly. This points to a bug in i915's PPS/eDP handling for this platform.
Full journal from a failing boot attached.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-27-generic 7.0.0-27.27
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: amadu 5146 F.... pipewire
amadu 5156 F.... wireplumber
/dev/snd/seq: amadu 5146 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 2 08:24:22 2026
HibernationDevice: RESUME=/dev/nvme0n1p4
InstallationDate: Installed on 2024-01-31 (882 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64
(20230807.2)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 8087:0033 Intel Corp. AX211 Bluetooth
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: HP HP Spectre x360 2-in-1 Laptop 14-ef2xxx
ProcFB: 0 xedrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic
root=UUID=33d6361d-5f51-4ce0-a339-53c78a33a78a ro quiet splash
resume=UUID=e3627b93-1692-49fe-9682-57247f02e418 i915.force_probe=!a7a1
xe.force_probe=a7a1
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: 12/15/2023
dmi.bios.release: 15.4
dmi.bios.vendor: Insyde
dmi.bios.version: F.04
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 8BA2
dmi.board.vendor: HP
dmi.board.version: 60.18
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 60.18
dmi.modalias:
dmi:bvnInsyde:bvrF.04:bd12/15/2023:br15.4:efr60.18:svnHP:pnHPSpectrex3602-in-1Laptop14-ef2xxx:pvrType1ProductConfigId:rvnHP:rn8BA2:rvr60.18:cvnHP:ct31:cvrChassisVersion:sku800N5EA#ABU:pfa103C_5335M8HPSpectre:
dmi.product.family: 103C_5335M8 HP Spectre
dmi.product.name: HP Spectre x360 2-in-1 Laptop 14-ef2xxx
dmi.product.sku: 800N5EA#ABU
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2158957
Title:
i915: black internal eDP panel after s2idle resume on HP x360 Raptor
Lake-P (8086:a7a1); PPS vdd_wakeref WARN; works with xe driver
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