Public bug reported:
After upgrade, monitor on nvidia card is black after entering X-windows.
Monitor on Intel works. I am using the nouveau driver, but I tried
switching to nvidia and it didn't help. 'inxi' thinks there is no driver
assigned, but 'lspci' thinks the driver is nouveau.
% sudo inxi -Gxx
Device-1: Intel Raptor Lake-S GT1 [UHD Graphics 770] vendor: Dell
driver: i915 v: kernel arch: Xe ports: active: DP-1 empty: HDMI-A-1
bus-ID: 0000:00:02.0 chip-ID: 8086:a780
Device-2: NVIDIA AD104 [GeForce RTX 4070] vendor: Dell driver: N/A
arch: Lovelace bus-ID: 0000:01:00.0 chip-ID: 10de:2786
%lspci -vnn
0000:00:02.0 VGA compatible controller [0300]: Intel Corporation Raptor Lake-S
GT1 [UHD Graphics 770] [8086:a780] (rev 04) (prog-if 00 [VGA controller])
...
Kernel driver in use: i915
Kernel modules: i915, xe
--
0000:01:00.0 VGA compatible controller [0300]: NVIDIA Corporation AD104
[GeForce RTX 4070] [10de:2786] (rev a1) (prog-if 00 [VGA controller])
...
Kernel modules: nvidiafb, nouveau
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: xorg 1:7.7+26ubuntu1
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: XFCE
Date: Fri Jul 17 12:38:05 2026
DistUpgraded: 2026-07-17 12:30:33,969 INFO ubuntu-insights not available,
skipping collection
DistroCodename: resolute
DistroVariant: ubuntu
DkmsStatus:
langford/0.0.20130108, 6.17.0-41-generic, x86_64: installed
langford/0.0.20130108, 7.0.0-28-generic, x86_64: installed
virtualbox/7.2.6, 6.17.0-41-generic, x86_64: installed
virtualbox/7.2.6, 7.0.0-28-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Raptor Lake-S GT1 [UHD Graphics 770] [8086:a780] (rev 04)
(prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:0bc0]
NVIDIA Corporation AD104 [GeForce RTX 4070] [10de:2786] (rev a1) (prog-if 00
[VGA controller])
Subsystem: Dell Device [1028:513a]
InstallationDate: Installed on 2024-04-13 (826 days ago)
InstallationMedia: Xubuntu 23.10 "Mantic Minotaur" - Release amd64 (20231010)
MachineType: Dell Inc. XPS 8960
ProcEnviron:
PATH=(custom, no user)
SHELL=/bin/tcsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=cb7673d1-bc0c-4fbd-93a8-02ecfb2cf9fd ro nouveau.modeset=0
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to resolute on 2026-07-17 (0 days ago)
dmi.bios.date: 07/28/2025
dmi.bios.release: 2.19
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.19.0
dmi.board.name: 0XD433
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvr2.19.0:bd07/28/2025:br2.19:svnDellInc.:pnXPS8960:pvr:rvnDellInc.:rn0XD433:rvrA01:cvnDellInc.:ct3:cvrNotSpecified:sku0BC0:pfaXPS:
dmi.product.family: XPS
dmi.product.name: XPS 8960
dmi.product.sku: 0BC0
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.131-1
version.libgl1-mesa-dri: libgl1-mesa-dri 26.0.3-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.22-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.18-1build1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute ubuntu
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https://bugs.launchpad.net/bugs/2161131
Title:
monitor on nvidia card black after upgrade
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