Public bug reported:
I get indication that reboot is necessary. when I reboot, Linux
7.0.0-34-generic is the default, but it does not have brightness control
for the screen, and the screen is at maximum brightness. I must reboot
and select Linux 7.0.0-31-generic to revert and get the brightness
control. The Linux 7.0.0-34-generic kernel is unusable on my machine
without the brightness control.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 7.0.0-31.31~24.04.1-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.fabric-imex-mgmt:
DeviceFileMinor: 4323
DeviceFileMode: 256
DeviceFileModify: 1
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file.
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 580.178.04 Tue Jul 7
12:38:21 UTC 2026
GCC version: gcc version 13.3.0 (Ubuntu 13.3.0-6ubuntu2~24.04.1)
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 25 11:01:12 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
DkmsStatus: nvidia/580.178.04, 7.0.0-31-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
NVIDIA Corporation TU117GLM [T1200 Laptop GPU] [10de:1fbc] (rev a1) (prog-if
00 [VGA controller])
Subsystem: Dell TU117GLM [T1200 Laptop GPU] [1028:0a6a]
InstallationDate: Installed on 2025-01-02 (631 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
MachineType: Dell Inc. Precision 7760
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-31-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/23/2026
dmi.bios.release: 1.49
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.49.0
dmi.board.name: 0N0J1X
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.49.0:bd07/23/2026:br1.49:svnDellInc.:pnPrecision7760:pvr:rvnDellInc.:rn0N0J1X:rvrA00:cvnDellInc.:ct10:cvr:sku0A6A:pfaPrecision:
dmi.product.family: Precision
dmi.product.name: Precision 7760
dmi.product.sku: 0A6A
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2ubuntu0.1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble ubuntu
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https://bugs.launchpad.net/bugs/2168547
Title:
No brightness control for display.
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