Public bug reported:
After upgrading from 7.0.0-31 to 7.0.0-38 on Ubuntu 26.04, no GPU driver is
bound (lspci shows no "Kernel driver in use" for the NVIDIA GPU),
/sys/class/backlight is empty, and Settings shows "Night Light Unavailable".
Booting 7.0.0-31-generic on the same machine works normally.
Hardware: Lenovo LOQ 15ARP9, Ryzen + GeForce RTX 4050 Max-Q. Wayland session.
Workaround: hold linux-*-hwe-26.04 metapackages and boot 7.0.0-31.
Here's more info to help you. Thank you.
7.0.0-38-generic
pcilib: Error reading /sys/bus/pci/devices/0000:00:08.3/label: Operation not
permitted
01:00.0 VGA compatible controller: NVIDIA Corporation AD107M [GeForce RTX 4050
Max-Q / Mobile] (rev a1)
Subsystem: Lenovo Device 3e3c
Kernel modules: nvidiafb, nouveau
01:00.1 Audio device: NVIDIA Corporation AD107 High Definition Audio Controller
(rev a1)
Subsystem: Lenovo Device 3d35
nvidia_wmi_ec_backlight 12288 0
video 77824 2 nvidia_wmi_ec_backlight,ideapad_laptop
wmi 36864 10
lenovo_wmi_events,video,nvidia_wmi_ec_backlight,lenovo_wmi_capdata,lenovo_wmi_hotkey_utilities,lenovo_wmi_other,wmi_bmof,lenovo_wmi_gamezone,ideapad_laptop,lenovo_wmi_helpers
Command 'dkms' not found, but can be installed with:
sudo apt install dkms
SecureBoot enabled
ii libnvidia-cfg1-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-595 595.84-0ubuntu0.26.04.1
amd64 Shared files used by the NVIDIA libraries
ii libnvidia-compute-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVIDIA libcompute package
ii libnvidia-decode-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-egl-wayland1:amd64 1:1.1.21-1
amd64 Wayland EGL External Platform library -- shared
library
ii libnvidia-encode-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVENC Video Encoding runtime library
ii libnvidia-extra-595:amd64 595.84-0ubuntu0.26.04.1
amd64 Extra libraries for the NVIDIA driver
ii libnvidia-fbc1-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVIDIA OpenGL-based Framebuffer Capture runtime
library
ii libnvidia-gl-595:amd64 595.84-0ubuntu0.26.04.1
amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and
Vulkan ICD
ii linux-firmware-nvidia-graphics
20260319.git217ca6e4-0ubuntu1.1 all Firmware for Nvidia
graphics
rc linux-modules-nvidia-595-open-7.0.0-29-generic 7.0.0-29.29+1
amd64 Linux kernel nvidia modules for version 7.0.0-29
ii linux-modules-nvidia-595-open-7.0.0-30-generic 7.0.0-30.30
amd64 Linux kernel nvidia modules for version 7.0.0-30
ii linux-modules-nvidia-595-open-7.0.0-31-generic 7.0.0-31.31
amd64 Linux kernel nvidia modules for version 7.0.0-31
ii linux-modules-nvidia-595-open-generic-hwe-26.04 7.0.0-31.31
amd64 Extra drivers for nvidia-595-open for the
generic-hwe-26.04 flavour
ii nvidia-compute-utils-595 595.84-0ubuntu0.26.04.1
amd64 NVIDIA compute utilities
ii nvidia-driver-595-open 595.84-0ubuntu0.26.04.1
amd64 NVIDIA driver (open kernel) metapackage
ii nvidia-firmware-595-595.84 595.84-0ubuntu0.26.04.1
amd64 Firmware files used by the kernel module
ii nvidia-kernel-common-595 595.84-0ubuntu0.26.04.1
amd64 Shared files used with the kernel module
ii nvidia-kernel-source-595-open 595.84-0ubuntu0.26.04.1
amd64 NVIDIA kernel source package
ii nvidia-prime 0.8.17.2build1
all Tools to enable NVIDIA's Prime
ii nvidia-settings 510.47.03-0ubuntu7
amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-595 595.84-0ubuntu0.26.04.1
amd64 NVIDIA driver support binaries
ii screen-resolution-extra 0.18.5build1
all Extension for the nvidia-settings control panel
ii xserver-xorg-video-nvidia-595 595.84-0ubuntu0.26.04.1
amd64 NVIDIA binary Xorg driver
[ 0.112559] Spectre V2 : Enabling Restricted Speculation for firmware calls
[ 0.636663] ACPI: bus type drm_connector registered
[ 0.655640] simple-framebuffer simple-framebuffer.0: [drm] Registered 1
planes with drm panic
[ 0.655659] [drm] Initialized simpledrm 1.0.0 for simple-framebuffer.0 on
minor 0
[ 0.658348] simple-framebuffer simple-framebuffer.0: [drm] fb0:
simpledrmdrmfb frame buffer device
[ 1.914214] ACPI: video: [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
[ 3.009620] systemd[1]: [email protected] - Load Kernel Module drm
skipped, unmet condition check ConditionKernelModuleLoaded=!drm
[ 3.013133] systemd[1]: systemd-hibernate-clear.service - Clear Stale
Hibernate Storage Info skipped, unmet condition check
ConditionPathExists=/sys/firmware/efi/efivars/HibernateLocation-8cf2644b-4b0b-428f-9387-6d876050dc67
[ 4.078462] mt7921e 0000:03:00.0: WM Firmware Version: ____010000, Build
Time: 20260224110949
[ 4.117455] input: HDA NVidia HDMI/DP,pcm=3 as
/devices/pci0000:00/0000:00:01.1/0000:01:00.1/sound/card0/input18
[ 4.134654] input: HDA NVidia HDMI/DP,pcm=7 as
/devices/pci0000:00/0000:00:01.1/0000:01:00.1/sound/card0/input19
[ 4.135773] input: HDA NVidia HDMI/DP,pcm=8 as
/devices/pci0000:00/0000:00:01.1/0000:01:00.1/sound/card0/input20
[ 4.136024] input: HDA NVidia HDMI/DP,pcm=9 as
/devices/pci0000:00/0000:00:01.1/0000:01:00.1/sound/card0/input21
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: anbsesay 6561 F.... wireplumber
/dev/snd/controlC0: anbsesay 6561 F.... wireplumber
/dev/snd/seq: anbsesay 6550 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 15 20:42:09 2026
InstallationDate: Installed on 2026-08-08 (68 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 83JC
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 simpledrmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic
root=UUID=2da2f6e8-ede5-4cf4-aa8a-5faf27d3aece 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: 05/11/2026
dmi.bios.release: 1.30
dmi.bios.vendor: LENOVO
dmi.bios.version: PQCN30WW
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 15ARP9
dmi.ec.firmware.release: 1.30
dmi.modalias:
dmi:bvnLENOVO:bvrPQCN30WW:bd05/11/2026:br1.30:efr1.30:svnLENOVO:pn83JC:pvrLOQ15ARP9:rvnLENOVO:rnLNVNB161216:rvrSDK0T76463WIN:cvnLENOVO:ct10:cvrLOQ15ARP9:skuLENOVO_MT_83JC_BU_idea_FM_LOQ15ARP9:pfaLOQ15ARP9:
dmi.product.family: LOQ 15ARP9
dmi.product.name: 83JC
dmi.product.sku: LENOVO_MT_83JC_BU_idea_FM_LOQ 15ARP9
dmi.product.version: LOQ 15ARP9
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "The is the bug report file"
https://bugs.launchpad.net/bugs/2171019/+attachment/6009540/+files/kernel38-gpu-info.txt
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https://bugs.launchpad.net/bugs/2171019
Title:
Error ID: OOPS-e9559a9b96f47d88be5e4d17775ac162. Kernel
7.0.0-38-generic: no GPU driver bound, brightness and Night Light
unavailable (Lenovo LOQ 15ARP9, RTX 4050)
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