Private bug reported:
On my Dell Latitude 5410 running Ubuntu 25.04 (Wayland session), the
internal keyboard frequently malfunctions after login or reboot.
Affected keys include u, j, 4, etc., which produce wrong characters or
nothing.
The issue occurs only on the internal keyboard. External USB keyboards
function correctly.
evtest shows proper key events.
libinput debug-events shows keypresses with code -1, which suggests
invalid scancode mapping or a failure in the kernel input layer.
Rebinding /sys/bus/platform/drivers/i8042/ sometimes restores function
temporarily.
The issue persists after BIOS update and occurs even with different
XKB/gsettings keyboard configs.
The system is fully up-to-date.
System Information
Laptop: Dell Latitude 5410
BIOS: Updated July 2025
OS: Ubuntu 25.04 (Wayland)
Input Device: AT Translated Set 2 keyboard
Package Affected: linux (kernel input subsystem)
Workarounds tried
Unbind/bind i8042 using scripts (partial and temporary fix)
Adjusting keyboard layout with gsettings
Using libinput and evdev tools
Switching to external keyboard (works fine)
Boot options: i8042.reset, i8042.dumbkbd, i8042.nopnp, etc.
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: linux-image-6.14.0-23-generic 6.14.0-23.23
ProcVersionSignature: Ubuntu 6.14.0-23.23-generic 6.14.5
Uname: Linux 6.14.0-23-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 10 14:02:12 2025
InstallationDate: Installed on 2025-07-08 (2 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
MachineType: Dell Inc. Latitude 5410
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-23-generic
root=UUID=d215ab04-94ad-4196-95fc-429777b722d0 ro quiet splash i8042.dumbkbd
i8042.nopnp i8042.reset
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.14.0-23-generic N/A
linux-backports-modules-6.14.0-23-generic N/A
linux-firmware 20250317.git1d4c88ee-0ubuntu1.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2025
dmi.bios.release: 1.36
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.36.1
dmi.board.name: 06KF2W
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.36.1:bd04/18/2025:br1.36:svnDellInc.:pnLatitude5410:pvr:rvnDellInc.:rn06KF2W:rvrA00:cvnDellInc.:ct10:cvr:sku09A0:
dmi.product.family: Latitude
dmi.product.name: Latitude 5410
dmi.product.sku: 09A0
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
** Information type changed from Public to Private
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https://bugs.launchpad.net/bugs/2116323
Title:
Internal keyboard malfunctions after reboot/login on Dell Latitude
5410
Status in linux package in Ubuntu:
New
Bug description:
On my Dell Latitude 5410 running Ubuntu 25.04 (Wayland session), the
internal keyboard frequently malfunctions after login or reboot.
Affected keys include u, j, 4, etc., which produce wrong characters or
nothing.
The issue occurs only on the internal keyboard. External USB keyboards
function correctly.
evtest shows proper key events.
libinput debug-events shows keypresses with code -1, which suggests
invalid scancode mapping or a failure in the kernel input layer.
Rebinding /sys/bus/platform/drivers/i8042/ sometimes restores function
temporarily.
The issue persists after BIOS update and occurs even with different
XKB/gsettings keyboard configs.
The system is fully up-to-date.
System Information
Laptop: Dell Latitude 5410
BIOS: Updated July 2025
OS: Ubuntu 25.04 (Wayland)
Input Device: AT Translated Set 2 keyboard
Package Affected: linux (kernel input subsystem)
Workarounds tried
Unbind/bind i8042 using scripts (partial and temporary fix)
Adjusting keyboard layout with gsettings
Using libinput and evdev tools
Switching to external keyboard (works fine)
Boot options: i8042.reset, i8042.dumbkbd, i8042.nopnp, etc.
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: linux-image-6.14.0-23-generic 6.14.0-23.23
ProcVersionSignature: Ubuntu 6.14.0-23.23-generic 6.14.5
Uname: Linux 6.14.0-23-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 10 14:02:12 2025
InstallationDate: Installed on 2025-07-08 (2 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
MachineType: Dell Inc. Latitude 5410
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-23-generic
root=UUID=d215ab04-94ad-4196-95fc-429777b722d0 ro quiet splash i8042.dumbkbd
i8042.nopnp i8042.reset
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.14.0-23-generic N/A
linux-backports-modules-6.14.0-23-generic N/A
linux-firmware 20250317.git1d4c88ee-0ubuntu1.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2025
dmi.bios.release: 1.36
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.36.1
dmi.board.name: 06KF2W
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.36.1:bd04/18/2025:br1.36:svnDellInc.:pnLatitude5410:pvr:rvnDellInc.:rn06KF2W:rvrA00:cvnDellInc.:ct10:cvr:sku09A0:
dmi.product.family: Latitude
dmi.product.name: Latitude 5410
dmi.product.sku: 09A0
dmi.sys.vendor: Dell Inc.
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