最近发现安卓LCD屏自开机后隔10分钟，屏幕会黑掉，过几秒又重新亮起来，现象出现时日志如下。有没有出现相同问题的，一块探讨探讨。。
[16:30:48]usb 2-1: USB disconnect, device number 2
[16:30:48]usb 2-1.1: USB disconnect, device number 3
[16:30:48]regulator regulator.5: Failed to increase supply voltage: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:48]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:48]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:49]cpu cpu0: failed to scale vddpu up: -6
[16:30:49]cpufreq: __target_index: Failed to change cpu frequency: -6
[16:30:54]usb 2-1: new high-speed USB device number 4 using ci_hdrc
[16:30:54]usb 2-1: New USB device found, idVendor=058f, idProduct=6254
[16:30:54]usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[16:30:54]hub 2-1:1.0: USB hub found
[16:30:54]hub 2-1:1.0: 4 ports detected
[16:30:55]usb 2-1.1: new high-speed USB device number 5 using ci_hdrc
[16:30:55]usb 2-1.1: New USB device found, idVendor=058f, idProduct=6366
[16:30:55]usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[16:30:55]usb 2-1.1: Product: Flash Card Reader/Writer
[16:30:55]usb 2-1.1: Manufacturer: Generic
[16:30:55]usb 2-1.1: SerialNumber: 058F63666485
[16:30:55]usb-storage 2-1.1:1.0: USB Mass Storage device detected
[16:30:55]scsi host0: usb-storage 2-1.1:1.0
[16:30:56]scsi 0:0:0:0: Direct-Access Multiple Card Reader 1.00 PQ: 0 ANSI: 4
[16:30:57]sd 0:0:0:0: [sda] Attached SCSI removable disk
[16:31:01]16.90.1:255.255.254.0::eth0:off init=/linuxrc console=ttySAC0 <
[16:31:01]/system/bin/sh: setenv: not found
