Gamepad axis getting constant events

I recently purchased a "Playmax Thunder Pad" USB gamepad, presuming it would be plug-and-play with linux (as gamepads tend to be), and much to my delight I have found that everything works correctly... except the right hand analog stick. I can move the analog stick and the movement events are registered in jstest-gtk as well as evtest, but the x-axis of the stick appears to be sending constant events that it is moving 1 or 2 points from the center. This makes it impossible to play any games as the view only moves for a second before the stick is detected as being centered again. I have tried calibrating the thing with no success. Here is an example evtest output: Input driver version is 1.0.1 Input device ID: bus 0x3 vendor 0x79 product 0xa version 0x110 Input device name: "Generic USB Joystick " Supported events: Event type 0 (EV_SYN) Event type 1 (EV_KEY) Event code 288 (BTN_TRIGGER) Event code 289 (BTN_THUMB) Event code 290 (BTN_THUMB2) Event code 291 (BTN_TOP) Event code 292 (BTN_TOP2) Event code 293 (BTN_PINKIE) Event code 294 (BTN_BASE) Event code 295 (BTN_BASE2) Event code 296 (BTN_BASE3) Event code 297 (BTN_BASE4) Event code 298 (BTN_BASE5) Event code 299 (BTN_BASE6) Event type 3 (EV_ABS) Event code 0 (ABS_X) Value 128 Min 0 Max 255 Flat 15 Event code 1 (ABS_Y) Value 128 Min 0 Max 255 Flat 15 Event code 2 (ABS_Z) Value 129 Min 0 Max 255 Flat 15 Event code 5 (ABS_RZ) Value 128 Min 0 Max 255 Flat 15 Event code 16 (ABS_HAT0X) Value 0 Min -1 Max 1 Event code 17 (ABS_HAT0Y) Value 0 Min -1 Max 1 Event type 4 (EV_MSC) Event code 4 (MSC_SCAN) Properties: Testing ... (interrupt to exit) Event: time 1493717417.256734, type 3 (EV_ABS), code 2 (ABS_Z), value 128 Event: time 1493717417.256734, -------------- SYN_REPORT ------------ Event: time 1493717417.264830, type 3 (EV_ABS), code 2 (ABS_Z), value 129 Event: time 1493717417.264830, -------------- SYN_REPORT ------------ Event: time 1493717417.280830, type 3 (EV_ABS), code 2 (ABS_Z), value 128 Event: time 1493717417.280830, -------------- SYN_REPORT ------------ Event: time 1493717417.288769, type 3 (EV_ABS), code 2 (ABS_Z), value 129 Event: time 1493717417.288769, -------------- SYN_REPORT ------------ Event: time 1493717417.384837, type 3 (EV_ABS), code 2 (ABS_Z), value 130 Event: time 1493717417.384837, -------------- SYN_REPORT ------------ ad infinitum. **P.S.** This is a linux-only issue, I can use this gamepad in my *other* installed OS with no issues whatsoever.