x4418 android5.1系统休眠后自动亮背光，并打印log

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Second Boot by Nexell Co. : Built on Nov 19 2014 20:10:38
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PLL0: 600000000   PLL1: 800000000   PLL2: 780000000   PLL3: 800000000

Divider0 PLL: 1 CPU:800000000   CPU BUS:200000000
Divider1 PLL: 0 BCLK:300000000   PCLK:150000000
Divider2 PLL: 3 MDCLK:800000000   MCLK:800000000   
                 MBCLK:400000000   MPCLK:200000000
Divider3 PLL: 0 G3D BCLK:300000000
Divider4 PLL: 0 MPEG BCLK:300000000   MPEG PCLK:150000000

123
DDR3 POR Init Start
phy init

########## READ/GATE Level ##########
DDR3 Init Done!
DDR3 SelfRefresh exit Done!
0x00000002
CRC: 0x036EDA47 FN: 0x4093AE30 phy: 0x40008200 len: 0x00020000 ret: 0x036EDA47
It's WARM BOOT
Jump to Kernel!
resume machine
ÿ[  275.488000] usb usb1: root hub lost power or was reset
[  275.494000] HDMI HPD State 0x0
[  275.838000] usb 1-1: reset high-speed USB device number 2 using nxp-ehci
[  276.416000] usb 1-1.4: reset low-speed USB device number 3 using nxp-ehci
[  276.690000] PM: suspend entry 2009-09-01 00:24:06.155188499 UTC
[  276.696000] PM: Syncing filesystems ... done.
[  276.712000] Freezing user space processes ... (elapsed 0.001 seconds) done.
[  276.720000] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[  276.730000] Suspending console(s) (use no_console_suspend to debug)
[  276.737000] dwc_otg_hcd_suspend, usb device mode
[  276.742000] pmu_suspend_chgcur = 1500000
[  276.745000] ov5645_s_power.............on=0...........
[  276.745000] mipi_phy_enable
[  276.745000] ov5645_s_power.............on=0...........
[  276.745000] front_camera_power_enable: is_front_camera_enabled 0, on 0
[  276.749000] setting Reset VR addr(0xf0012008)
[  276.749000] setting ClockGen, set 0
[  276.749000] setting PHY_BASEADDR_POWER_GATE, set 1
[  276.749000] setting PHY_BASEADDR_PMU_ISOLATE, set 0
[  276.749000] setting PHY_BASEADDR_PMU_ISOLATE+4, set 1
[  276.750000] setting PHY_BASEADDR_PMU_ISOLATE+8, set 1
[  276.751000] read PHY_BASEADDR_PMU_ISOLATE + 0xC
[  276.751000] Wait Power Down Ack(powerUpAck=0x00000003)
suspend_enter enter
suspend machine...

在测试Android5.1系统时，长时间无人打扰的情况下，系统隔一段时间就会打印一段这样的log，并且显示屏的背光会亮一下，然后又睡眠，一直这样重复，不知九鼎在测试的时候有没有出现，希望坛主鼎力支持。