** Description changed:
SUMMARY
After suspending the laptop (via systemctl suspend or lid close) and
resuming, the internal display never comes back on. The system is
otherwise fully functional — confirmed via SSH that networking, the
GNOME session, and the GPU are all alive and responsive. The backlight
is physically on, but no image is displayed. Only a hard reboot
recovers the display.
HARDWARE
- Laptop: Lenovo LOQ
- CPU/iGPU: Intel Raptor Lake-S, UHD Graphics [8086:a78b] (rev 04)
- dGPU: NVIDIA GeForce RTX 5050 Max-Q (GB207M) [10de:2dd8] (rev a1),
- hybrid/Optimus graphics
+ hybrid/Optimus graphics
- Secure Boot: enabled
SOFTWARE
- Ubuntu 26.04 LTS (Resolute Raccoon)
- Kernel: 7.0.0-27-generic (also reproduces on 7.0.0-22-generic)
- Display server: Wayland, GNOME Shell (mutter 50.1), GDM
- nvidia-driver-595-open 595.71.05-0ubuntu0.26.04.1
- PRIME mode: on-demand (default)
STEPS TO REPRODUCE
1. Boot normally (panel works fine).
2. Suspend: `systemctl suspend`, or close the lid.
3. Wake the system (open lid / press a key).
EXPECTED
Panel lights up and shows the lock screen / desktop, same as after a
normal cold boot.
ACTUAL
Screen stays completely black. Backlight is on (confirmed via
/sys/class/backlight/*/actual_brightness). The rest of the system is
fully alive: SSH'd in and confirmed networking, GNOME session, and
GPU are all responsive; `nvidia-smi` works; gnome-shell process is
running normally.
ROOT CAUSE (as far as I could trace it)
Every single boot — cold or resumed — logs this i915 message:
- i915 0000:00:02.0: [drm] [ENCODER:506:DDI A/PHY A] failed to
- retrieve link info, disabling eDP
+ i915 0000:00:02.0: [drm] [ENCODER:506:DDI A/PHY A] failed to
+ retrieve link info, disabling eDP
On a cold boot, i915 evidently recovers from this before GDM starts,
and the panel works normally. After an S3 resume, it does NOT
recover: I confirmed via /sys/class/drm/ that the real internal panel
connector never comes back under the i915 (or nvidia-drm) device —
instead, `card0` remains bound to the `simple-framebuffer` driver
(the generic EFI/firmware fallback framebuffer), which is what
continues to "own" the panel indefinitely, with no active KMS
scanout ever taking over. This matches the visible symptom exactly:
the panel is electrically powered (backlight on) but nothing is
being drawn to it because no real GPU driver has claimed the output.
WHAT I'VE RULED OUT
- NVIDIA/PRIME as the cause: reproduced identically with
- `sudo prime-select intel` (NVIDIA driver fully unloaded,
- `nvidia-smi` returning "couldn't communicate with the NVIDIA
- driver"). Bug persists with NVIDIA completely out of the picture,
- so this is purely an i915/Intel-side issue.
+ `sudo prime-select intel` (NVIDIA driver fully unloaded,
+ `nvidia-smi` returning "couldn't communicate with the NVIDIA
+ driver"). Bug persists with NVIDIA completely out of the picture,
+ so this is purely an i915/Intel-side issue.
- Panel power-saving states: tried `i915.enable_psr=0
- i915.enable_dc=0` kernel parameters — no change in behavior.
+ i915.enable_dc=0` kernel parameters — no change in behavior.
- A hung/crashed GPU: no Xid errors, no i915 GPU hang messages, no
- kernel oops/BUG in dmesg around the resume window. The kernel and
- compositor both report healthy state; the panel output is just
- never actually reclaimed from simple-framebuffer.
+ kernel oops/BUG in dmesg around the resume window. The kernel and
+ compositor both report healthy state; the panel output is just
+ never actually reclaimed from simple-framebuffer.
ADDITIONAL NOTES
- Suspend mode in use is real S3 ("deep"), not s2idle
- (/sys/power/mem_sleep shows "s2idle [deep]").
+ (/sys/power/mem_sleep shows "s2idle [deep]").
- Attempting to force a re-probe via `sudo chvt 3 && sudo chvt 1`
- did not recover the panel.
+ did not recover the panel.
- Will attach dmesg output spanning a full suspend/resume cycle.
-
Note: I found this to be the same issue in latest Fedora and CachyOS
-
- Note: I'm not very technical on this (LLMs helped with this) and I'll
- really appreciate the support on this, thanks in advance.
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/controlC2: zizo 4608 F.... wireplumber
- /dev/snd/controlC0: zizo 4608 F.... wireplumber
- /dev/snd/controlC1: zizo 4608 F.... wireplumber
- /dev/snd/seq: zizo 4587 F.... pipewire
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC2: zizo 4608 F.... wireplumber
+ /dev/snd/controlC0: zizo 4608 F.... wireplumber
+ /dev/snd/controlC1: zizo 4608 F.... wireplumber
+ /dev/snd/seq: zizo 4587 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 4 17:07:28 2026
InstallationDate: Installed on 2026-06-20 (14 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
MachineType: LENOVO 83JE
ProcEnviron:
- LANG=en_US.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=en_US.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
ProcFB: 0 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic
root=UUID=e500acb9-7646-4972-acfa-579d662fd7e4 ro quiet splash
i915.enable_psr=0 i915.enable_dc=0
lsm=capability,landlock,yama,apparmor,ima,evm
resume=UUID=e500acb9-7646-4972-acfa-579d662fd7e4 resume_offset=113035264
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: 01/15/2025
dmi.bios.release: 1.44
dmi.bios.vendor: LENOVO
dmi.bios.version: R3CN44WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76463 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: LOQ 15IRX10
dmi.ec.firmware.release: 1.44
dmi.modalias:
dmi:bvnLENOVO:bvrR3CN44WW:bd01/15/2025:br1.44:efr1.44:svnLENOVO:pn83JE:pvrLOQ15IRX10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76463WIN:cvnLENOVO:ct10:cvrLOQ15IRX10:skuLENOVO_MT_83JE_BU_idea_FM_LOQ15IRX10:pfaLOQ15IRX10:
dmi.product.family: LOQ 15IRX10
dmi.product.name: 83JE
dmi.product.sku: LENOVO_MT_83JE_BU_idea_FM_LOQ 15IRX10
dmi.product.version: LOQ 15IRX10
dmi.sys.vendor: LENOVO
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2159568
Title:
[Lenovo LOQ, Raptor Lake-S + RTX 5050] Internal panel stays black
after suspend/resume (S3) — i915 eDP link fails to recover, unlike on
cold boot
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