当插入pendrive时，系统看不到我的pendrive（在gprated，fdisk -l，df dh，/ dev / sdX等中没有跟踪）
dmesg | grep USB dmesg | grep USB确实告诉我：
[ 151.352051] usb 3-1.1: new high-speed USB device number 5 using ehci-pci [ 151.461979] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 151.461986] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 151.461990] usb 3-1.1: Product: TransMemory-Mx [ 151.461993] usb 3-1.1: Manufacturer: TOSHIBA [ 151.461996] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 151.462365] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 151.462801] scsi host9: usb-storage 3-1.1:1.0 [ 183.352051] usb 3-1.1: reset high-speed USB device number 5 using ehci-pci [ 188.460043] usb 3-1.1: device descriptor read/64, error -110 [ 204.076059] usb 3-1.1: device descriptor read/64, error -110 [ 204.264057] usb 3-1.1: reset high-speed USB device number 5 using ehci-pci [ 209.452052] usb 3-1.1: device descriptor read/64, error -110 [ 225.068060] usb 3-1.1: device descriptor read/64, error -110 [ 225.256043] usb 3-1.1: reset high-speed USB device number 5 using ehci-pci [ 230.367282] usb 3-1.1: device descriptor read/8, error -110 [ 235.743429] usb 3-1.1: device descriptor read/8, error -110 [ 235.928055] usb 3-1.1: reset high-speed USB device number 5 using ehci-pci [ 241.119321] usb 3-1.1: device descriptor read/8, error -110 [ 246.495329] usb 3-1.1: device descriptor read/8, error -110 [ 246.600462] usb 3-1.1: USB disconnect, device number 5 [ 246.760019] usb 3-1.1: new high-speed USB device number 6 using ehci-pci [ 251.948052] usb 3-1.1: device descriptor read/64, error -110 [ 267.564051] usb 3-1.1: device descriptor read/64, error -110 [ 267.752051] usb 3-1.1: new high-speed USB device number 7 using ehci-pci [ 272.940050] usb 3-1.1: device descriptor read/64, error -110 [ 288.556059] usb 3-1.1: device descriptor read/64, error -110 [ 288.744055] usb 3-1.1: new high-speed USB device number 8 using ehci-pci [ 293.855285] usb 3-1.1: device descriptor read/8, error -110 [ 299.231294] usb 3-1.1: device descriptor read/8, error -110 [ 299.416051] usb 3-1.1: new high-speed USB device number 9 using ehci-pci [ 304.607340] usb 3-1.1: device descriptor read/8, error -110 [ 309.983386] usb 3-1.1: device descriptor read/8, error -110 [ 310.088135] usb 3-1-port1: unable to enumerate USB device [ 1401.148052] usb 3-1.1: new high-speed USB device number 10 using ehci-pci [ 1401.262112] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1401.262119] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1401.262123] usb 3-1.1: Product: TransMemory-Mx [ 1401.262126] usb 3-1.1: Manufacturer: TOSHIBA [ 1401.262129] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1401.262675] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1401.263149] scsi host9: usb-storage 3-1.1:1.0 [ 1402.384039] usb 3-1.1: reset high-speed USB device number 10 using ehci-pci [ 1402.492661] usb 3-1.1: device firmware changed [ 1402.492847] usb 3-1.1: USB disconnect, device number 10 [ 1402.624050] usb 3-1.1: new high-speed USB device number 11 using ehci-pci [ 1402.733860] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1402.733864] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1402.733865] usb 3-1.1: Product: TransMemory-Mx [ 1402.733866] usb 3-1.1: Manufacturer: TOSHIBA [ 1402.733867] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1402.734113] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1402.734329] scsi host9: usb-storage 3-1.1:1.0 [ 1403.860068] usb 3-1.1: reset high-speed USB device number 11 using ehci-pci [ 1403.968654] usb 3-1.1: device firmware changed [ 1403.968872] usb 3-1.1: USB disconnect, device number 11 [ 1404.088051] usb 3-1.1: new high-speed USB device number 12 using ehci-pci [ 1404.198156] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1404.198164] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1404.198167] usb 3-1.1: Product: TransMemory-Mx [ 1404.198170] usb 3-1.1: Manufacturer: TOSHIBA [ 1404.198173] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1404.198541] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1404.198857] scsi host9: usb-storage 3-1.1:1.0 [ 1405.324062] usb 3-1.1: reset high-speed USB device number 12 using ehci-pci [ 1405.432662] usb 3-1.1: device firmware changed [ 1405.432873] usb 3-1.1: USB disconnect, device number 12 [ 1405.560054] usb 3-1.1: new high-speed USB device number 13 using ehci-pci [ 1405.670166] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1405.670173] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1405.670177] usb 3-1.1: Product: TransMemory-Mx [ 1405.670180] usb 3-1.1: Manufacturer: TOSHIBA [ 1405.670183] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1405.670592] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1405.670982] scsi host9: usb-storage 3-1.1:1.0 [ 1406.800035] usb 3-1.1: reset high-speed USB device number 13 using ehci-pci [ 1406.912641] usb 3-1.1: device firmware changed [ 1406.913006] usb 3-1.1: USB disconnect, device number 13 [ 1407.048032] usb 3-1.1: new high-speed USB device number 14 using ehci-pci [ 1407.161751] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1407.161758] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1407.161762] usb 3-1.1: Product: TransMemory-Mx [ 1407.161765] usb 3-1.1: Manufacturer: TOSHIBA [ 1407.161769] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1407.162184] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1407.162496] scsi host9: usb-storage 3-1.1:1.0 [ 1408.300052] usb 3-1.1: reset high-speed USB device number 14 using ehci-pci [ 1408.408679] usb 3-1.1: device firmware changed [ 1408.408897] usb 3-1.1: USB disconnect, device number 14 [ 1408.548063] usb 3-1.1: new high-speed USB device number 15 using ehci-pci [ 1408.658310] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1408.658317] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1408.658321] usb 3-1.1: Product: TransMemory-Mx [ 1408.658324] usb 3-1.1: Manufacturer: TOSHIBA [ 1408.658327] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1408.658691] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1408.658954] scsi host9: usb-storage 3-1.1:1.0 [ 1409.772043] usb 3-1.1: reset high-speed USB device number 15 using ehci-pci [ 1409.880689] usb 3-1.1: device firmware changed [ 1409.880892] usb 3-1.1: USB disconnect, device number 15 [ 1410.008051] usb 3-1.1: new high-speed USB device number 16 using ehci-pci [ 1410.117899] usb 3-1.1: New USB device found, idVendor=0930, idProduct=6545 [ 1410.117902] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1410.117904] usb 3-1.1: Product: TransMemory-Mx [ 1410.117905] usb 3-1.1: Manufacturer: TOSHIBA [ 1410.117905] usb 3-1.1: SerialNumber: 60A44C429E4EED80E00054E3 [ 1410.118166] usb-storage 3-1.1:1.0: USB Mass Storage device detected [ 1410.118354] scsi host9: usb-storage 3-1.1:1.0 [ 1442.872052] usb 3-1.1: reset high-speed USB device number 16 using ehci-pci [ 1447.980047] usb 3-1.1: device descriptor read/64, error -110 [ 1463.596065] usb 3-1.1: device descriptor read/64, error -110 [ 1463.784108] usb 3-1.1: reset high-speed USB device number 16 using ehci-pci [ 1468.972064] usb 3-1.1: device descriptor read/64, error -110 [ 1484.588062] usb 3-1.1: device descriptor read/64, error -110 [ 1484.776019] usb 3-1.1: reset high-speed USB device number 16 using ehci-pci [ 1489.887299] usb 3-1.1: device descriptor read/8, error -110 [ 1495.263349] usb 3-1.1: device descriptor read/8, error -110 [ 1495.448112] usb 3-1.1: reset high-speed USB device number 16 using ehci-pci [ 1500.639238] usb 3-1.1: device descriptor read/8, error -110 [ 1506.015267] usb 3-1.1: device descriptor read/8, error -110 [ 1506.120394] usb 3-1.1: USB disconnect, device number 16 [ 1506.276029] usb 3-1.1: new high-speed USB device number 17 using ehci-pci [ 1511.468063] usb 3-1.1: device descriptor read/64, error -110 [ 1527.084048] usb 3-1.1: device descriptor read/64, error -110 [ 1527.272050] usb 3-1.1: new high-speed USB device number 18 using ehci-pci [ 1532.460035] usb 3-1.1: device descriptor read/64, error -110 [ 1548.076098] usb 3-1.1: device descriptor read/64, error -110 [ 1548.264049] usb 3-1.1: new high-speed USB device number 19 using ehci-pci [ 1553.375397] usb 3-1.1: device descriptor read/8, error -110 [ 1558.751260] usb 3-1.1: device descriptor read/8, error -110 [ 1558.936049] usb 3-1.1: new high-speed USB device number 20 using ehci-pci [ 1564.127319] usb 3-1.1: device descriptor read/8, error -110 [ 1569.503352] usb 3-1.1: device descriptor read/8, error -110 [ 1569.608187] usb 3-1-port1: unable to enumerate USB device
我们可以看到，系统返回-110错误。 什么可能会导致这个问题？