Public bug reported:
Hello,
I am reporting a hardware misidentification issue with the XP-Pen Star
G640 (reported by the system as "Hanvon ugee 6 inch PenTablet Pen"). On
Ubuntu running Wayland, the device is permanently stuck in eraser mode.
Evidence:
Hardware ID: 28bd:0914
Detection Issue: As shown in the attached libinput debug-tablet
output, the system identifies the tool as Tool: eraser serial 0, id 0
even when using the standard pen tip.
Missing Capabilities: libinput list-devices shows Capabilities:
tablet but lacks the necessary stylus sub-attributes for pressure and
correct tool mapping.
Environment:
OS: Ubuntu
Session: Wayland
Driver: hid-uclogic (kernel) / libinput (compositor)
Because I am on Wayland, standard X11 tools like xsetwacom are
unavailable to remap this behavior. I am requesting a proper hardware
quirk or libwacom update to correctly identify this stylus.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: linux-image-6.17.0-8-generic 6.17.0-8.8
ProcVersionSignature: Ubuntu 6.17.0-8.8-generic 6.17.2
Uname: Linux 6.17.0-8-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Jan 9 22:32:09 2026
HibernationDevice: RESUME=/dev/nvme0n1p4
InstallationDate: Installed on 2025-10-04 (97 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
MachineType: LENOVO 20W1S22T26
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.17.0-8-generic
root=UUID=32e81498-5fd5-4d39-8809-6de2cd420660 ro quiet splash
i915.force_probe=* i915.modeset=1 resume=/dev/nvme0n1p4 mem_sleep_default=deep
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1.5
SourcePackage: linux
UpgradeStatus: Upgraded to questing on 2025-11-15 (55 days ago)
dmi.bios.date: 10/30/2024
dmi.bios.release: 1.64
dmi.bios.vendor: LENOVO
dmi.bios.version: N34ET64W (1.64 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20W1S22T26
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.45
dmi.modalias:
dmi:bvnLENOVO:bvrN34ET64W(1.64):bd10/30/2024:br1.64:efr1.45:svnLENOVO:pn20W1S22T26:pvrThinkPadT14Gen2i:rvnLENOVO:rn20W1S22T26:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20W1_BU_Think_FM_ThinkPadT14Gen2i:
dmi.product.family: ThinkPad T14 Gen 2i
dmi.product.name: 20W1S22T26
dmi.product.sku: LENOVO_MT_20W1_BU_Think_FM_ThinkPad T14 Gen 2i
dmi.product.version: ThinkPad T14 Gen 2i
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing
** Attachment added: "Screenshot From 2026-01-09 22-40-40 1.png"
https://bugs.launchpad.net/bugs/2138133/+attachment/5938425/+files/Screenshot%20From%202026-01-09%2022-40-40%201.png
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https://bugs.launchpad.net/bugs/2138133
Title:
XP-Pen Star G640 (28bd:0914) incorrectly detected as Eraser on Wayland
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