我有一个 RTL1892CU wifi USB 棒，我试图在 yocto Linux 上稳定运行。它运行良好，但当我拔下 USB 插头然后再次插入时，它停止工作。它没有说明任何有关错误的信息，但它没有从 AP 获取 IP。为了使其工作，我必须重新启动系统或键入命令：
dmesg -C
第一次插入usb后的日志为
[ 33.129763] usb 1-1: new high-speed USB device number 2 using ehci-platform
[ 33.351676] usb 1-1: New USB device found, idVendor=7392, idProduct=7811, bcd Device= 2.00
[ 33.358455] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 33.379746] usb 1-1: Product: 802.11n WLAN Adapter
[ 33.383107] usb 1-1: Manufacturer: Realtek
[ 33.387191] usb 1-1: SerialNumber: 00e04c000001
[ 33.593936] cfg80211: Loading compiled-in X.509 certificates for regulatory d atabase
[ 33.682840] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 33.905544] rtl8192cu: Chip version 0x10
[ 34.018440] rtl8192cu: Board Type 0
[ 34.020782] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 34.026348] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 34.050846] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 34.069671] usbcore: registered new interface driver rtl8192cu
[ 34.228300] rtl8192cu: MAC auto ON okay!
[ 34.268704] rtl8192cu: Tx queue select: 0x05
[ 38.552443] wlan0: authenticate with 92:9d:68:94:d8:6f
[ 38.586600] wlan0: send auth to 92:9d:68:94:d8:6f (try 1/3)
[ 38.599408] wlan0: authenticated
[ 38.609928] wlan0: associate with 92:9d:68:94:d8:6f (try 1/3)
[ 38.629800] wlan0: RX AssocResp from 92:9d:68:94:d8:6f (capab=0x431 status=0 aid=1)
[ 38.658315] wlan0: associated
[ 38.663567] wlan0: Limiting TX power to 0 (-128 - 0) dBm as advertised by 92: 9d:68:94:d8:6f
[ 39.089956] cryptd: max_cpu_qlen set to 1000
[ 39.308201] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
当我拔掉 USB 时它会显示
root@user:~# [ 142.320842] usb 1-1: USB disconnect, device number 2
[ 142.361473] wlan0: deauthenticating from 92:9d:68:94:d8:6f by local choice (Reason: 3=DEAUTH_LEAVING)
[ 142.370593] rtl_usb: reg 0x102, usbctrl_vendorreq TimeOut! status:0xffffffed value=0xd30000
[ 142.378271] rtl_usb: reg 0x422, usbctrl_vendorreq TimeOut! status:0xffffffed value=0xf00069ce
[ 142.386621] rtl_usb: reg 0x542, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x69543421
[ 142.395084] rtl_usb: reg 0x1cc, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x69543421
再次插上后显示..
root@user:~# [ 184.211693] usb 1-1: new high-speed USB device number 3 using ehci-platform
[ 184.413615] usb 1-1: New USB device found, idVendor=7392, idProduct=7811, bcdDevice= 2.00
[ 184.420515] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 184.429866] usb 1-1: Product: 802.11n WLAN Adapter
[ 184.434632] usb 1-1: Manufacturer: Realtek
[ 184.437317] usb 1-1: SerialNumber: 00e04c000001
[ 184.445634] rtl8192cu: Chip version 0x10
[ 184.559752] rtl8192cu: Board Type 0
[ 184.562338] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 184.567784] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 184.576555] ieee80211 phy1: Selected rate control algorithm 'rtl_rc'
我怎么解决这个问题？谢谢你！
更新： 手动拔掉设备插头时，它会显示..
root@user# [ 293.874491] usb 1-1: USB disconnect, device number 6
[ 293.913290] wlan0: deauthenticating from 00:4e:35:99:ce:a0 by local choice (Reason: 3=DEAUTH_LEAVING)
然后重新插入它时，日志是..
root@user# [ 392.603244] usb 1-1: new high-speed USB device number 7 using ehci-platform
[ 392.805378] usb 1-1: New USB device found, idVendor=7392, idProduct=7811, bcdDevice= 2.00
[ 392.812316] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 392.821606] usb 1-1: Product: 802.11n WLAN Adapter
[ 392.826236] usb 1-1: Manufacturer: Realtek
[ 392.829057] usb 1-1: SerialNumber: 00e04c000001
[ 392.841273] rtl8192cu: Chip version 0x10
[ 392.954756] rtl8192cu: Board Type 0
[ 392.957229] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[ 392.962859] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[ 392.969672] ieee80211 phy5: Selected rate control algorithm 'rtl_rc'
Phy每次都在持续增加