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Bug 1866

Summary: Wheel not detected as joystick or gamepad
Product: SDL Reporter: Pete Allen <peter.allenm>
Component: joystickAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: gabomdq
Version: HG 2.0   
Hardware: x86   
OS: Linux   

Description Pete Allen 2013-05-25 13:53:54 UTC 
A Guillemot Force Feedback Racing Wheel (Ferrari badged, circa 2000) is not detected as a joystick. The reason for this is that it supports the following events instead of ABS_X and ABS_Y:

 Event code 8 (ABS_WHEEL)
 Event code 9 (ABS_GAS)
 Event code 10 (ABS_BRAKE)

so the test in IsJoystick() fails as ABS_X and ABS_Y are not supported:
    if (!(test_bit(EV_KEY, evbit) && test_bit(EV_ABS, evbit) &&
         test_bit(ABS_X, absbit) && test_bit(ABS_Y, absbit))) 

In my local version I bodged this to
    if (!(test_bit(EV_KEY, evbit) && test_bit(EV_ABS, evbit) &&
          test_bit(ABS_WHEEL, absbit) && test_bit(ABS_GAS, absbit))) {

and the wheel works correctly (although clearly this would break every other joystick..)
Comment 1 Gabriel Jacobo 2013-11-11 22:34:41 UTC 
Do you experience this with the latest from HG and udev enabled?
Comment 2 Gabriel Jacobo 2013-11-14 13:24:44 UTC 
I've added a few troubleshooting tips to the README-linux.txt file, this is probably the best we can do as a "fix" (along with the actual fixes available in HG)