[GNU/Linux] ioctl() errors due to Logitech keyboard receiver

[vanfanel]

Hi there,

Recently I noticed that some errors are appearing on the TTY when running SDL2 programs:

root@DietPi:~/prince# prince
ioctl (GFEATURE): Broken pipe
ioctl (GFEATURE): Broken pipe
ioctl (GFEATURE): Broken pipe
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Invalid argument
ioctl (GFEATURE): Broken pipe
ioctl (GFEATURE): Broken pipe
ioctl (GFEATURE): Broken pipe

Now, let's see.
lsusb reports this:

root@DietPi:~/prince# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 045e:028e Microsoft Corp. Xbox360 Controller
Bus 001 Device 006: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 2341:8036 Arduino SA Leonardo (CDC ACM, HID)
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

So, doing this makes the errors go away:
env SDL_HIDAPI_IGNORE_DEVICES=0x046d/0x0000 prince

So I went and tried adding this in src/joystick/SDL_joystick.c inside SDL_bool SDL_ShouldIgnoreJoystick():

MAKE_VIDPID(0x046d, 0xc534), /* Logitech Unifying Receiver for K220 Keyboard and Mouse combo */

and also tried

MAKE_VIDPID(0x046d, 0x0000), /* Logitech Unifying Receiver for K220 Keyboard and Mouse combo */

...but the errors still appear.

Only SDL_HIDAPI_IGNORE_DEVICES=0x046d/0x0000 seems to work!
Any idea on how to correctly fix this?

Thanks!

[slouken]

Fixed, thanks!