Esto sale [root@visitor15 ROACH]# dmesg | tail -20 eth0: no IPv6 routers present mtrr: type mismatch for f1c00000,200000 old: write-back new: write-combining mtrr: type mismatch for f1800000,400000 old: write-back new: write-combining mtrr: type mismatch for f1000000,800000 old: write-back new: write-combining fuse init (API version 7.10) usb 2-1.4: new full speed USB device using ehci_hcd and address 5 usb 2-1.4: configuration #1 chosen from 1 choice usb 1-1.1: USB disconnect, address 3 usb 1-1.1: new low speed USB device using ehci_hcd and address 6 usb 1-1.1: configuration #1 chosen from 1 choice input: USB Keyboard as /class/input/input5 input,hidraw0: USB HID v1.10 Keyboard [ USB Keyboard] on usb-0000:00:1a.0-1.1 input: USB Keyboard as /class/input/input6 input,hidraw0: USB HID v1.10 Device [ USB Keyboard] on usb-0000:00:1a.0-1.1 usb 2-1.4: USB disconnect, address 5 usb 2-1.6: USB disconnect, address 4 usb 2-1.4: new full speed USB device using ehci_hcd and address 6 usb 2-1.4: configuration #1 chosen from 1 choice usb 2-1.3: new full speed USB device using ehci_hcd and address 7 usb 2-1.3: configuration #1 chosen from 1 choice Para usar lsusb tuve que ir al path como root: cd /sbin y ./lsusb , lo que muestra es [root@visitor15 sbin]# ./lsusb Protocol spec without prior Class and Subclass spec at line 4297 Bus 002 Device 007: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter Bus 002 Device 006: ID 0fe6:9700 Kontron (Industrial Computer Source / ICS Advent) DM9601 Fast Ethernet Adapter Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 0000:0000 Bus 002 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse Bus 001 Device 006: ID 04d9:1702 Holtek Semiconductor, Inc. Bus 001 Device 001: ID 0000:0000 Bus 001 Device 004: ID 0bc2:5031 Seagate RSS LLC FreeAgent GoFlex USB 3.0 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 005: ID 1e3d:4083 Chipsbank Microelectronics Co., Ltd Identifique que el Adaptador USB-Serial es Bus 002 Device 007: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter. y el Adaptador USB-Ethernet es Bus 002 Device 006: ID 0fe6:9700 Kontron (Industrial Computer Source / ICS Advent) DM9601 Fast Ethernet Adapter. Esto es por si sirve de algo para resolver el problema, la FPGA tiene una salida serial que la conecto al computador con un adaptador serial- usb (esta nuevo) y tambien la FPGA tiene una salida de un cable ethernet cruzado al computador que lo conecto con un adaptador ethernet-usb (nuevo) . Lo digo porque quizas el computador no esta reconociendo ambos adaptadores y tenga que instalar los controladores que tampoco se como hacerlo. Saludos