7231-4 安装U盘问题

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启动时提示如下：

usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
PCI/DMA
wl0: wlc_attach: chiprev 0 coreunit 0 corerev 9 cccap 0x4787aa maccap 0x0 band 2
.4G, phy_type 2 phy_rev 7 ana_rev 2
wl0: Broadcom BCM4320 802.11 Wireless Controller 4.150.10.5
CSLIP: code copyright 1989 Regents of the University of California
PPP generic driver version 2.4.2
usb-ohci.c: USB OHCI at membase 0xb8003000, IRQ 6
usb-ohci.c: usb-00:03.0, PCI device 14e4:4716
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
uhci.c: USB Universal Host Controller Interface driver v1.1
hub.c: Cannot enable port 1 of hub 1, disabling port.
hub.c: Maybe the USB cable is bad?

请问有人遇到过这种情况吗？谢谢

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haha 我之前的WVR线缆没弄好 就是这样


检查地线和USB外壳都要接地

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谢谢，是地线长度过长