This bug report was migrated from our old Bugzilla tracker.

Reported in version: 2.0.10
Reported for operating system, platform: Linux, x86_64

Comments on the original bug report:

On 2019-08-02 19:44:46 +0000, Andrew Church wrote:

In SDL 2.0.10, SDL_WaitEvent() can stall for a short but noticeable period of time (200-300ms?) even while events are pending. I observed this as seeing joystick input seem to drop out once every few seconds using a udev-based controller (specifically a Sony DualShock 3).

This does not occur in SDL 2.0.9.

Sample code (spin an analog stick and watch for the event counter to pause):

#include <assert.h>
#include <stdio.h>
#include <SDL2/SDL.h>
int main(void)
{
int counter = 0;
SDL_Init(SDL_INIT_EVERYTHING);
assert(SDL_NumJoysticks() >= 1);
SDL_Joystick *js = SDL_JoystickOpen(0);
assert(js);
for (;;) {
SDL_Event event;
SDL_WaitEvent(&event);
printf("event %d\n", counter++);
}
}

On 2019-08-06 06:49:45 +0000, Sam Lantinga wrote:

Ryan, can you look at this ASAP?