Public bug reported:
One of two monitors stopped working/detecting after a recent Ubuntu
update. Both monitors worked fine before the last update.
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.4 LTS
Release: 24.04
Codename: noble
xrandr
Screen 0: minimum 16 x 16, current 2944 x 1080, maximum 32767 x 32767
None-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 508mm x 285mm
1920x1080 59.96*+
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.52
1680x1050 59.95
1440x900 59.89
1280x800 59.81
1152x720 59.97
960x600 59.63
928x580 59.88
800x500 59.50
768x480 59.90
720x480 59.71
640x400 59.95
320x200 58.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
VGA-1 connected 1024x768+1920+0 (normal left inverted right x axis y axis) 0mm
x 0mm
1024x768 59.92*+
800x600 59.86
640x480 59.38
320x240 59.52
960x600 59.63
928x580 59.88
800x500 59.50
768x480 59.90
720x480 59.71
640x400 59.95
320x200 58.96
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
lspci
00:00.0 Host bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 DMI2 (rev
02)
00:01.0 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express
Root Port 1 (rev 02)
00:01.1 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express
Root Port 1 (rev 02)
00:03.0 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express
Root Port 3 (rev 02)
00:03.2 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express
Root Port 3 (rev 02)
00:05.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Address Map, VTd_Misc, System Management (rev 02)
00:05.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Hot
Plug (rev 02)
00:05.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 RAS,
Control Status and Global Errors (rev 02)
00:05.4 PIC: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 I/O APIC (rev 02)
00:11.0 Unassigned class [ff00]: Intel Corporation C610/X99 series chipset SPSR
(rev 05)
00:11.4 SATA controller: Intel Corporation C610/X99 series chipset sSATA
Controller [AHCI mode] (rev 05)
00:14.0 USB controller: Intel Corporation C610/X99 series chipset USB xHCI Host
Controller (rev 05)
00:16.0 Communication controller: Intel Corporation C610/X99 series chipset MEI
Controller #1 (rev 05)
00:1a.0 USB controller: Intel Corporation C610/X99 series chipset USB Enhanced
Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation C610/X99 series chipset HD Audio
Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation C610/X99 series chipset PCI Express Root
Port #1 (rev d5)
00:1c.2 PCI bridge: Intel Corporation C610/X99 series chipset PCI Express Root
Port #3 (rev d5)
00:1c.3 PCI bridge: Intel Corporation C610/X99 series chipset PCI Express Root
Port #4 (rev d5)
00:1c.4 PCI bridge: Intel Corporation C610/X99 series chipset PCI Express Root
Port #5 (rev d5)
00:1c.6 PCI bridge: Intel Corporation C610/X99 series chipset PCI Express Root
Port #7 (rev d5)
00:1d.0 USB controller: Intel Corporation C610/X99 series chipset USB Enhanced
Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation C610/X99 series chipset LPC Controller
(rev 05)
00:1f.3 SMBus: Intel Corporation C610/X99 series chipset SMBus Controller (rev
05)
01:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX TITAN
X] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GM200 High Definition Audio (rev a1)
05:00.0 Non-Volatile memory controller: Phison Electronics Corporation E18
PCIe4 NVMe Controller (rev 01)
06:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection
(rev 03)
07:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection
(rev 03)
08:00.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge (rev 03)
09:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics
Family (rev 30)
0a:00.0 USB controller: ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller
ff:0b.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 R3
QPI Link 0 & 1 Monitoring (rev 02)
ff:0b.1 Performance counters: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
R3 QPI Link 0 & 1 Monitoring (rev 02)
ff:0b.2 Performance counters: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
R3 QPI Link 0 & 1 Monitoring (rev 02)
ff:0c.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0c.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0c.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0c.3 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0c.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0c.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Unicast Registers (rev 02)
ff:0f.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Buffered Ring Agent (rev 02)
ff:0f.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Buffered Ring Agent (rev 02)
ff:0f.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
System Address Decoder & Broadcast Registers (rev 02)
ff:0f.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
System Address Decoder & Broadcast Registers (rev 02)
ff:0f.6 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
System Address Decoder & Broadcast Registers (rev 02)
ff:10.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCIe
Ring Interface (rev 02)
ff:10.1 Performance counters: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
PCIe Ring Interface (rev 02)
ff:10.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Scratchpad & Semaphore Registers (rev 02)
ff:10.6 Performance counters: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Scratchpad & Semaphore Registers (rev 02)
ff:10.7 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Scratchpad & Semaphore Registers (rev 02)
ff:12.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Home
Agent 0 (rev 02)
ff:12.1 Performance counters: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Home Agent 0 (rev 02)
ff:13.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Target Address, Thermal & RAS Registers (rev 02)
ff:13.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Target Address, Thermal & RAS Registers (rev 02)
ff:13.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel Target Address Decoder (rev 02)
ff:13.3 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel Target Address Decoder (rev 02)
ff:13.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel Target Address Decoder (rev 02)
ff:13.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel Target Address Decoder (rev 02)
ff:13.6 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO Channel 0/1 Broadcast (rev 02)
ff:13.7 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO Global Broadcast (rev 02)
ff:14.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 0 Thermal Control (rev 02)
ff:14.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 1 Thermal Control (rev 02)
ff:14.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 0 ERROR Registers (rev 02)
ff:14.3 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 1 ERROR Registers (rev 02)
ff:14.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 0 & 1 (rev 02)
ff:14.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 0 & 1 (rev 02)
ff:14.6 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 0 & 1 (rev 02)
ff:14.7 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 0 & 1 (rev 02)
ff:15.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 2 Thermal Control (rev 02)
ff:15.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 3 Thermal Control (rev 02)
ff:15.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 2 ERROR Registers (rev 02)
ff:15.3 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 0 Channel 3 ERROR Registers (rev 02)
ff:16.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 1 Target Address, Thermal & RAS Registers (rev 02)
ff:16.6 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO Channel 2/3 Broadcast (rev 02)
ff:16.7 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO Global Broadcast (rev 02)
ff:17.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Integrated Memory Controller 1 Channel 0 Thermal Control (rev 02)
ff:17.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 2 & 3 (rev 02)
ff:17.5 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 2 & 3 (rev 02)
ff:17.6 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 2 & 3 (rev 02)
ff:17.7 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
DDRIO (VMSE) 2 & 3 (rev 02)
ff:1e.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Power Control Unit (rev 02)
ff:1e.1 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Power Control Unit (rev 02)
ff:1e.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Power Control Unit (rev 02)
ff:1e.3 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Power Control Unit (rev 02)
ff:1e.4 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7
Power Control Unit (rev 02)
ff:1f.0 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 VCU
(rev 02)
ff:1f.2 System peripheral: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 VCU
(rev 02)
lspci | grep -E 'VGA|3D|Display'
lspci | grep -E 'VGA|3D|Display'
01:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX TITAN
X] (rev a1)
09:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics
Family (rev 30)
01:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX TITAN
X] (rev a1)
09:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics
Family (rev 30)
echo $XDG_SESSION_TYPE
wayland
ubuntu-drivers devices
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
== /sys/devices/pci0000:00/0000:00:03.2/0000:01:00.0 ==
modalias : pci:v000010DEd000017C2sv00003842sd00002992bc03sc00i00
vendor : NVIDIA Corporation
model : GM200 [GeForce GTX TITAN X]
driver : nvidia-driver-580 - distro non-free
driver : nvidia-driver-535-server - distro non-free
driver : nvidia-driver-470-server - distro non-free
driver : nvidia-driver-535 - distro non-free recommended
driver : nvidia-driver-580-server - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 17 14:14:33 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
NVIDIA Corporation GM200 [GeForce GTX TITAN X] [10de:17c2] (rev a1) (prog-if
00 [VGA controller])
Subsystem: eVga.com. Corp. GM200 [GeForce GTX TITAN X] [3842:2992]
ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000] (rev 30) (prog-if
00 [VGA controller])
Subsystem: ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000]
InstallationDate: Installed on 2026-02-02 (166 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: ASUS All Series
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=fc4ad642-2ec7-45e7-b61b-ca7b43fd2aa2 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/28/2019
dmi.bios.release: 5.11
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4001
dmi.board.asset.tag: Default string
dmi.board.name: X99-WS/IPMI
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr4001:bd05/28/2019:br5.11:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnX99-WS/IPMI:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:sku:pfaASUSMB:
dmi.product.family: ASUS MB
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS
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.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 wayland-session
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2161125
Title:
One of two monitors stopped working/detecting after a recent Ubuntu
update (regression).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/2161125/+subscriptions
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