Public bug reported:
Hardware: HP Spectre x360 (2017/2018 model), Intel Kaby Lake iGPU (i915),
internal panel eDP-1 1920x1080.
OS: Ubuntu 26.04 LTS (resolute), fresh install.
Regression:
- linux-image-7.0.0-14-generic : suspend/resume works correctly
- linux-image-7.0.0-30-generic : internal panel stays black after resume
Same machine, same OS install, only the kernel differs.
Symptoms on 7.0.0-30:
- After resume, the system is fully alive and interactive (reachable via SSH).
- An external monitor connected via USB-C shows the session normally,
including the lock screen; only the internal eDP panel shows nothing.
- Also reproduces from a text VT (Ctrl+Alt+F3), so it is not GNOME/mutter
specific.
Observed state while the panel is black:
- /sys/class/drm/card1-eDP-1/{status,enabled,dpms} = connected / enabled / On
- /sys/class/backlight/intel_backlight/bl_power = 0, brightness = 1023 (max)
- i915_display_info: [CRTC:58:pipe A] enable=yes, active=yes,
mode 1920x1080@60, port_clock=270000, lane_count=2,
[PLANE:34:plane 1A] visible=yes with a valid FB.
i.e. the display pipeline appears to be scanning out normally.
- dmesg shows a clean cycle: "PM: suspend entry (deep)" ... "PM: suspend exit",
with no i915 errors and no flip_done timeouts.
- Shining a light on the panel shows no image, so the panel itself is not
displaying, rather than only the backlight being off.
Things that did NOT help:
- Writing to /sys/class/backlight/intel_backlight/brightness and bl_power
- i915.enable_dc=0 (verified applied: DC3->DC5 count stayed 0)
- i915.enable_psr=0
- mem_sleep_default=s2idle
- Restarting gdm (a freshly started compositor still shows nothing)
- Unplugging the external monitor / changing the display configuration
Note: the panel reports two fixed modes (1920x1080@60 and 1920x1080@40).
Possibly related: LP#2163734 (same 7.0 vs 6.17 regression pattern,
Haswell).
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-30-generic 7.0.0-30.30
ProcVersionSignature: Ubuntu 7.0.0-30.30-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ponkan 2714 F.... wireplumber
/dev/snd/seq: ponkan 2704 F.... pipewire
CasperMD5CheckResult: pass
Date: Wed Aug 26 20:46:45 2026
InstallationDate: Installed on 2026-08-26 (0 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 1bcf:0007 Sunplus Innovation Technology Inc. Optical
Mouse
Bus 001 Device 003: ID 064e:3401 Suyin Corp. HP TrueVision FHD RGB-IR
Bus 001 Device 004: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: HP HP Spectre x360 Convertible 13-ac0XX
ProcEnviron:
LANG=ja_JP.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-30-generic
root=UUID=246e4a97-522e-4d36-be70-da75cc62af36 ro quiet splash
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: 10/31/2017
dmi.bios.release: 15.40
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.40
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 827E
dmi.board.vendor: HP
dmi.board.version: 94.70
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 94.70
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF.40:bd10/31/2017:br15.40:efr94.70:svnHP:pnHPSpectrex360Convertible13-ac0XX:pvr:rvnHP:rn827E:rvr94.70:cvnHP:ct31:cvrChassisVersion:sku1DF87PA#ABJ:pfa103C_5335KVHPSpectre:
dmi.product.family: 103C_5335KV HP Spectre
dmi.product.name: HP Spectre x360 Convertible 13-ac0XX
dmi.product.sku: 1DF87PA#ABJ
dmi.sys.vendor: HP
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
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https://bugs.launchpad.net/bugs/2165130
Title:
[i915/Kaby Lake] Internal eDP panel stays black after resume from
suspend on 7.0.0-30 (works on 7.0.0-14)
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