[问题]在灭屏时log中会打印wait vblank failed，有时会不停打印，是哪里有问题？谢谢

01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆 €errno 22
01-01 08:15:35.295   959   973 W C01400/Composer: OnVsync: Vsync ns is 0, drop this callback
01-01 08:15:35.295   959   973 E C01400/DISP: [WaitNextVBlank@drm_vsync_worker.cpp:89] wait vblank failed ret :銆€-1銆