Support Request: Device Support Request: Gotop T505 / 08f2:6811

What do you need help with?

Hello,

I am requesting a configuration file (.json quirk) for the SZ PING-IT INC. T505 tablet.

The generic kernel driver was blocked (udev rule 08f2:6811), but OpenTabletDriver (OTD) still does not recognize it.

--- DEVICE DATA ---
MOMENTUM MT100, ZINNIA
Name: SZ PING-IT INC. T505 Graphic Tablet (also listed as Gotop Information Inc.)
VID:PID: 08f2:6811
--- RAW LOG (EVTEST /DEV/INPUT/EVENT7) ---

Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x8f2 product 0x6811 version 0x110
Input device name: "SZ PING-IT INC. T505 Graphic Tablet"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 320 (BTN_TOOL_PEN)
Event code 321 (BTN_TOOL_RUBBER)
Event code 330 (BTN_TOUCH)
Event code 331 (BTN_STYLUS)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 0
Min 0
Max 32767
Resolution 161
Event code 1 (ABS_Y)
Value 0
Min 0
Max 32767
Resolution 242
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 2047
Event code 26 (ABS_TILT_X)
Value 0
Min -127
Max 127
Event code 27 (ABS_TILT_Y)
Value 0
Min -127
Max 127
Event type 4 (EV_MSC)
Event code 4 (MSC_SCAN)
Properties:
Property type 0 (INPUT_PROP_POINTER)

--- END OF LOG ---

Thank you for your help!

What have you tried?

What have you tried?

1. Driver Installation Check: Confirmed that the required kernel headers (6.14.0-35-generic) and the X.Org driver (xserver-xorg-input-wacom) are installed.
2. Temporary Xinput Transformations: Attempted multiple Coordinate Transformation Matrices via xinput (e.g., 180°, 90° CW, 90° CCW, and single-axis inversions) to correct the axis swap/inversion. All failed to provide correct, smooth movement.
3. Persistent X.Org Fix: Created a custom configuration file (/etc/X11/xorg.conf.d/50-tablet-fix.conf) to persistently apply transformation matrices. This partially corrected the issue but the movement remained awkward.
4. OpenTabletDriver (OTD) Status: Installed OTD (v0.6.6.2), but the tablet was initially not detected.
5. Kernel Driver Blocking (Successful): Created a udev rule (99-opentabletdriver.rules) to block the generic kernel driver (hid-generic) from taking control of the tablet's Vendor ID (08f2) and Product ID (6811). This succeeded, as the device disappeared from xinput list.
6. Final Diagnosis: Used sudo evtest /dev/input/event7 to successfully generate the raw device data (Max X: 32767, Max Pressure: 2047), confirming the need for a custom OTD quirk.

Diagnostic Information

Diagnostic Information

• Operating System: Zorin OS (Ubuntu-based)
• Kernel Version: 6.14.0-35-generic
• Desktop Environment/Server: Wayland (running Xwayland)
• OpenTabletDriver Version: v0.6.6.2
• Device Name (as seen by kernel): Gotop Information Inc. T505 Graphic Tablet / SZ PING-IT INC. T505 Graphic Tablet
• Device IDs (VID:PID): 08f2:6811

Acknowledgements

• I have installed OpenTabletDriver by following its official installation instructions.
• I have checked the OpenTabletDriver Wiki and respective FAQ pages, and my issue was not covered or actually fixed.
• I have searched the existing issues and this new issue is not a duplicate of any.
• I have written a concise and meaningful title.
• I am on the latest version of OpenTabletDriver.

Start with the supplied evtest output and compare it with existing OpenTabletDriver device quirks or configuration entries. Done means the T505 with VID:PID 08f2:6811 is recognized and its reported axes, pressure, and tilt behave correctly on the listed setup.