我是路由器板的openwrt的linux中usb接上AIR720使用。

电路上air720的usb一直都固定供电5V。

air720的powerkey拉到地。

对air720进行硬件供电开机多次（约10次）之后，出现下面usb无法识别的错误。

[  759.740000] usb 1-1: new high-speed USB device number 17 using ehci-platform
[  770.550000] usb 1-1: new high-speed USB device number 18 using ehci-platform
[  775.980000] usb 2-1: new full-speed USB device number 26 using ohci-platform
[  776.170000] usb 2-1: device descriptor read/64, error -62
[  776.470000] usb 2-1: device descriptor read/64, error -62
[  776.770000] usb 2-1: new full-speed USB device number 27 using ohci-platform
[  776.960000] usb 2-1: device descriptor read/64, error -62
[  777.260000] usb 2-1: device descriptor read/64, error -62
[  777.560000] usb 2-1: new full-speed USB device number 28 using ohci-platform
[  777.990000] usb 2-1: device not accepting address 28, error -62
[  778.180000] usb 2-1: new full-speed USB device number 29 using ohci-platform
[  778.610000] usb 2-1: device not accepting address 29, error -62
[  778.620000] usb usb2-port1: unable to enumerate USB device
[  870.180000] usb 1-1: new high-speed USB device number 19 using ehci-platform
[  880.980000] usb 1-1: new high-speed USB device number 20 using ehci-platform
[  886.410000] usb 2-1: new full-speed USB device number 30 using ohci-platform
[  886.600000] usb 2-1: device descriptor read/64, error -62
[  886.900000] usb 2-1: device descriptor read/64, error -62
[  887.200000] usb 2-1: new full-speed USB device number 31 using ohci-platform
[  887.390000] usb 2-1: device descriptor read/64, error -62
[  887.690000] usb 2-1: device descriptor read/64, error -62
[  887.990000] usb 2-1: new full-speed USB device number 32 using ohci-platform
[  888.420000] usb 2-1: device not accepting address 32, error -62
[  888.610000] usb 2-1: new full-speed USB device number 33 using ohci-platform
[  889.040000] usb 2-1: device not accepting address 33, error -62
[  889.050000] usb usb2-port1: unable to enumerate USB device
[  980.610000] usb 1-1: new high-speed USB device number 21 using ehci-platform
[  991.420000] usb 1-1: new high-speed USB device number 22 using ehci-platform
[  996.850000] usb 2-1: new full-speed USB device number 34 using ohci-platform
[  997.040000] usb 2-1: device descriptor read/64, error -62
[  997.340000] usb 2-1: device descriptor read/64, error -62
[  997.640000] usb 2-1: new full-speed USB device number 35 using ohci-platform
[  997.830000] usb 2-1: device descriptor read/64, error -62
[  998.130000] usb 2-1: device descriptor read/64, error -62
[  998.430000] usb 2-1: new full-speed USB device number 36 using ohci-platform
[  998.860000] usb 2-1: device not accepting address 36, error -62
[  999.050000] usb 2-1: new full-speed USB device number 37 using ohci-platform
[  999.480000] usb 2-1: device not accepting address 37, error -62
[  999.490000] usb usb2-port1: unable to enumerate USB device

这个故障只能对模块全部断电（含USB VCC）之后，再次重启，AIR720才会再次正常。

是否我这么使用AIR720进入某个模式，比如刷机模式，导致AIR720假开机出现？

或者有没有什么固件可以避免出现这个问题？