$ glxgears -printfps
2986 frames in 5.0 seconds = 597.118 FPS
2984 frames in 5.0 seconds = 596.624 FPS
2983 frames in 5.0 seconds = 596.580 FPS
glxgears: intel_ioctl.c:62: intelEmitIrqLocked: Assertion `((*(int *)intel->driHwLock) & ~0x40000000U) == (0x80000000U|intel->hHWContext)' failed.
Abandon