Public bug reported:
Hardware:
- Laptop: ASUS TUF Gaming FX705DY
- External Keyboard: Core68HE USB Hall Effect Keyboard
Operating System:
- Ubuntu 26.04 LTS
Kernel Versions:
- Working: 7.0.0-27-generic
- Broken: 7.0.0-28-generic
Issue:
After upgrading from Linux kernel 7.0.0-27 to 7.0.0-28, the Right Arrow
key stops functioning completely.
The issue affects both:
- The built-in laptop keyboard
- An external USB keyboard (Core68HE)
The Left, Up, and Down Arrow keys continue to work normally.
The external keyboard works correctly on Windows, confirming it is not a
hardware issue.
Booting back into Linux kernel 7.0.0-27 immediately restores normal
functionality for the Right Arrow key on both keyboards, confirming this
is a regression introduced in kernel 7.0.0-28.
Steps to Reproduce:
1. Boot Ubuntu 26.04 using Linux kernel 7.0.0-28.
2. Press the Right Arrow key.
3. Observe that no input is generated.
4. Reboot into Linux kernel 7.0.0-27.
5. Press the Right Arrow key again.
6. The key functions normally.
Additional Information:
- Keyboard layout: US
- Session: GNOME on Wayland
- The issue was reproduced with two different keyboards.
- Basic troubleshooting included testing with evtest, libinput, wev, dumpkeys,
and verifying keyboard mappings.
- The regression was isolated by comparing kernel versions, with 7.0.0-27
working correctly and 7.0.0-28 consistently exhibiting the issue.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28
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
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: mk1 3947 F.... wireplumber
/dev/snd/controlC1: mk1 3947 F.... wireplumber
/dev/snd/controlC0: mk1 3947 F.... wireplumber
/dev/snd/seq: mk1 3932 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul 20 10:19:58 2026
InstallationDate: Installed on 2026-05-12 (69 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
IwDevWlp3s0Link: Not connected.
MachineType: ASUSTeK COMPUTER INC. TUF Gaming FX705DY_FX705DY
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=be4998cd-5602-446b-b7aa-74f878bd2c8a ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: FX705DY.315
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: FX705DY
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrFX705DY.315:bd03/09/2020:br5.14:svnASUSTeKCOMPUTERINC.:pnTUFGamingFX705DY_FX705DY:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnFX705DY:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaTUFGaming:
dmi.product.family: TUF Gaming
dmi.product.name: TUF Gaming FX705DY_FX705DY
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2161282
Title:
Regression: Right Arrow key stops working after upgrading from Linux
kernel 7.0.0-27 to 7.0.0-28 on Ubuntu 26.04 LTS
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