Public bug reported:
After kernel update, only one monitor receives signal; works fine on
previous kernel.
Behavior: Boot → no signal on second monitor despite connections
checked.
Hardware: [your GPU/monitor details].
xrandr output:
Screen 0: minimum 16 x 16, current 1920 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
lspci -k | grep -EA3 'VGA|3D|Display'output:
01:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX TITAN
X] (rev a1)
Subsystem: eVga.com. Corp. GM200 [GeForce GTX TITAN X]
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
01:00.1 Audio device: NVIDIA Corporation GM200 High Definition Audio (rev a1)
--
09:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics
Family (rev 30)
Subsystem: ASPEED Technology, Inc. ASPEED Graphics Family
Kernel driver in use: ast
Kernel modules: ast
lsb_release -a output:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.3 LTS
Release: 24.04
Codename: noble
uname -a output:
Linux TitanX 6.8.0-87-generic #88-Ubuntu SMP PREEMPT_DYNAMIC Sat Oct 11
09:28:41 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Motherboard, processor, ram and video card output:
=== MOTHERBOARD ===
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: X99-WS/IPMI
Serial Number: 150137896900070
=== PROCESSOR ===
Model name: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 1
=== RAM (Total + Slots) ===
Locator: DIMM_A1
Bank Locator: NODE 1
Locator: DIMM_A2
Bank Locator: NODE 1
Size: 8 GB
Locator: DIMM_B1
Bank Locator: NODE 1
Speed: 2133 MT/s
Manufacturer: G-Skill
Configured Memory Speed: 2133 MT/s
Locator: DIMM_B2
Bank Locator: NODE 1
Size: 8 GB
Locator: DIMM_C1
Bank Locator: NODE 1
Speed: 2133 MT/s
Manufacturer: G-Skill
Configured Memory Speed: 2133 MT/s
Locator: DIMM_C2
Bank Locator: NODE 1
Size: 8 GB
Locator: DIMM_D1
Bank Locator: NODE 1
Speed: 2133 MT/s
Manufacturer: G-Skill
Configured Memory Speed: 2133 MT/s
Locator: DIMM_D2
Bank Locator: NODE 1
Mem: 23Gi 4.9Gi 12Gi 309Mi 6.5Gi 18Gi
=== VIDEO CARD ===
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)
(Driver in use:)
Kernel driver in use: ast
---
The signal is present when I boot to the previous version.
Thank you all for taking the time to look into this.
Entering "cat /proc/version_signature > version.log" or "sudo lspci
-vnvn > lspci-vnvn.log" resulted in nothing. I can only assume I am
doing it wrong.
and
apt-cache policy pkgname output:
N: Unable to locate package pkgname
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-87-generic 6.8.0-87.88
ProcVersionSignature: Ubuntu 6.8.0-87.88-generic 6.8.12
Uname: Linux 6.8.0-87-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gividen 3474 F.... wireplumber
/dev/snd/controlC1: gividen 3474 F.... wireplumber
/dev/snd/seq: gividen 3471 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 7 11:03:22 2025
InstallationDate: Installed on 2025-01-03 (308 days ago)
InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64
(20240220)
IwConfig:
lo no wireless extensions.
enp6s0 no wireless extensions.
enp7s0 no wireless extensions.
MachineType: ASUS All Series
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB:
0 simpledrmdrmfb
1 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-87-generic
root=UUID=75899358-e127-4c78-b8be-61335944af37 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.8.0-87-generic N/A
linux-backports-modules-6.8.0-87-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.19
RfKill:
SourcePackage: linux
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:
dmi.product.family: ASUS MB
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2130898
Title:
Only one monitor recieves a signal after knerel update
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