Public bug reported:
Problem Description:
After upgrading to kernel 7.0.0-28-generic, my HP ZBook 15 G4 laptop displays a
completely black screen upon waking from suspend (closing and opening the lid).
The system appears to be running (fans, LEDs active) but the display remains
off. The only way to recover is to force a hard shutdown by holding the power
button.
This issue did not exist with kernel 6.17.0-41-generic, where
suspend/resume worked perfectly.
System Information:
- Laptop Model: HP ZBook 15 G4
- Graphics Card: NVIDIA Quadro M1200 or M2200 (Hybrid/Discrete)
- OS: Ubuntu (version 24.10 or 25.04 - please confirm based on kernel)
- Current Kernel: 7.0.0-28-generic
- Previous Working Kernel: 6.17.0-41-generic
Steps to Reproduce:
1. Boot the system with kernel 7.0.0-28-generic.
2. Close the lid or manually suspend the system (sudo systemctl suspend).
3. Wait a few seconds.
4. Open the lid or press any key to wake the system.
5. The screen remains black and unresponsive. No backlight, no display output.
Expected Behavior:
The display should turn on and show the login screen or desktop, as it does
with kernel 6.17.0-41.
Additional Context:
I have already attempted the following workarounds without success:
- Adding kernel parameters to GRUB:
nvidia.NVreg_PreserveVideoMemoryAllocations=1 acpi_sleep=nonvs
intel_idle.max_cstate=2
- Disabling Secure Boot and setting Graphics Mode to "Discrete" in BIOS
- Reinstalling NVIDIA drivers
This appears to be a regression introduced in kernel 7.0.0-28, as it
works flawlessly with kernel 6.17.0-41. Please investigate the changes
in DRM/NVIDIA/ACPI handling that may have caused this issue for HP ZBook
G4 series laptops.
I have attached the requested logs:
- version.log
- lspci-vnv.log
Thank you for your time and efforts in resolving this issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: NimaHatami 3758 F.... wireplumber
/dev/snd/controlC0: NimaHatami 3758 F.... wireplumber
/dev/snd/seq: NimaHatami 3742 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Jul 28 14:06:27 2026
MachineType: HP HP ZBook 15 G4
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-28-generic
root=UUID=4fccc91e-5b81-4057-be81-4e0854b8b673 ro quiet splash
nvidia.NVreg_PreserveVideoMemoryAllocations=1 acpi_sleep=nonvs
intel_idle.max_cstate=2
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)
WifiSyslog:
dmi.bios.date: 12/08/2023
dmi.bios.release: 1.49
dmi.bios.vendor: HP
dmi.bios.version: P70 Ver. 01.49
dmi.board.name: 8275
dmi.board.vendor: HP
dmi.board.version: KBC Version 46.80
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.ec.firmware.release: 70.128
dmi.modalias:
dmi:bvnHP:bvrP70Ver.01.49:bd12/08/2023:br1.49:efr70.128:svnHP:pnHPZBook15G4:pvr:rvnHP:rn8275:rvrKBCVersion46.80:cvnHP:ct10:cvr:skuY4E78AV:pfa103C_5336AN:
dmi.product.family: 103C_5336AN
dmi.product.name: HP ZBook 15 G4
dmi.product.sku: Y4E78AV
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/2161961
Title:
Black screen after suspend/resume on HP ZBook 15 G4 with kernel
7.0.0-28
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