我是来自印度孟买的 Ubuntu 用户，订阅了 MTNL 的 Triband 宽带服务。我有一个双启动系统，安装了 Windows 7 和 Ubuntu 12.04。在 Windows 7 上工作时，我的互联网连接良好，但在 Ubuntu 上，尽管菜单中可以看到表示以太网连接正常的“上下箭头”，但我无法访问任何网站或使用终端执行任何 Ubuntu 更新。在 Windows 中，连接是自动的，不需要任何用户名或密码。根据我在这里进行的一些搜索，我找到了一些命令，它们的输出有助于识别问题。我将以下三行的输出发布出来：-
1）lshw
pratik@Eureka:~$ sudo lshw
eureka
description: Computer
width: 64 bits
capabilities: vsyscall32
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 1874MiB
*-cpu
product: AMD Athlon(tm) II X3 440 Processor
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 1
bus info: cpu@0
size: 800MHz
capacity: 800MHz
width: 64 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save cpufreq
*-pci:0
description: Host bridge
product: RS690 Host Bridge
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 32 bits
clock: 66MHz
configuration: latency=32
*-pci:0
description: PCI bridge
product: RS690 PCI to PCI Bridge (Internal gfx)
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master cap_list
resources: ioport:e000(size=4096) memory:fde00000-fdffffff ioport:d8000000(size=134217728)
*-display
description: VGA compatible controller
product: Radeon 2100
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 5
bus info: pci@0000:01:05.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=radeon latency=32
resources: irq:18 memory:d8000000-dfffffff memory:fdff0000-fdffffff ioport:ee00(size=256) memory:fde00000-fdefffff
*-pci:1
description: PCI bridge
product: RS690 PCI to PCI Bridge (PCI Express Port 2)
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 6
bus info: pci@0000:00:06.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:40 ioport:d000(size=4096) memory:fdd00000-fddfffff ioport:fda00000(size=1048576)
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 03
serial: 6c:f0:49:dd:10:69
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168d-2.fw ip=192.168.1.33 latency=0 multicast=yes port=MII speed=100Mbit/s
resources: irq:41 ioport:de00(size=256) memory:fdaff000-fdafffff memory:fdaf8000-fdafbfff memory:fda00000-fda1ffff
*-storage
description: SATA controller
product: SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode]
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 11
bus info: pci@0000:00:11.0
logical name: scsi1
version: 00
width: 32 bits
clock: 66MHz
capabilities: storage ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=32
resources: irq:22 ioport:ff00(size=8) ioport:fe00(size=4) ioport:fd00(size=8) ioport:fc00(size=4) ioport:fb00(size=16) memory:fe02f000-fe02f3ff
*-cdrom
description: DVD-RAM writer
product: BAER DH-24AAS
vendor: MOSER
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: BM7Z
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-usb:0
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 12
bus info: pci@0000:00:12.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32
resources: irq:16 memory:fe02e000-fe02efff
*-usb:1
description: USB controller
product: SB7x0 USB OHCI1 Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 12.1
bus info: pci@0000:00:12.1
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32
resources: irq:16 memory:fe02d000-fe02dfff
*-usb:2
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 12.2
bus info: pci@0000:00:12.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=32
resources: irq:17 memory:fe02c000-fe02c0ff
*-usb:3
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 13
bus info: pci@0000:00:13.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32
resources: irq:18 memory:fe02b000-fe02bfff
*-usb:4
description: USB controller
product: SB7x0 USB OHCI1 Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 13.1
bus info: pci@0000:00:13.1
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32
resources: irq:18 memory:fe02a000-fe02afff
*-usb:5
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 13.2
bus info: pci@0000:00:13.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=32
resources: irq:19 memory:fe029000-fe0290ff
*-serial
description: SMBus
product: SBx00 SMBus Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14
bus info: pci@0000:00:14.0
version: 3c
width: 32 bits
clock: 66MHz
capabilities: cap_list
configuration: driver=piix4_smbus latency=0
resources: irq:0
*-ide
description: IDE interface
product: SB7x0/SB8x0/SB9x0 IDE Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14.1
bus info: pci@0000:00:14.1
version: 00
width: 32 bits
clock: 66MHz
capabilities: ide bus_master cap_list
configuration: driver=pata_atiixp latency=32
resources: irq:16 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:fa00(size=16)
*-multimedia
description: Audio device
product: SBx00 Azalia (Intel HDA)
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14.2
bus info: pci@0000:00:14.2
version: 00
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:16 memory:fe024000-fe027fff
*-isa
description: ISA bridge
product: SB7x0/SB8x0/SB9x0 LPC host controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:2
description: PCI bridge
product: SBx00 PCI to PCI Bridge
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14.4
bus info: pci@0000:00:14.4
version: 00
width: 32 bits
clock: 66MHz
capabilities: pci subtractive_decode bus_master vga_palette
resources: ioport:c000(size=4096) memory:fdc00000-fdcfffff memory:fdb00000-fdbfffff
*-usb:6
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 14.5
bus info: pci@0000:00:14.5
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=32
resources: irq:18 memory:fe028000-fe028fff
*-pci:1
description: Host bridge
product: Family 10h Processor HyperTransport Configuration
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 101
bus info: pci@0000:00:18.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Family 10h Processor Address Map
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 102
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Family 10h Processor DRAM Controller
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 103
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Family 10h Processor Miscellaneous Control
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 104
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k10temp
resources: irq:0
*-pci:5
description: Host bridge
product: Family 10h Processor Link Control
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 105
bus info: pci@0000:00:18.4
version: 00
width: 32 bits
clock: 33MHz
*-scsi
physical id: 1
bus info: scsi@4
logical name: scsi4
capabilities: scsi-host
configuration: driver=usb-storage
2）lspci
pratik@Eureka:~$ lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] nee ATI RS690 Host Bridge
00:01.0 PCI bridge: Advanced Micro Devices [AMD] nee ATI RS690 PCI to PCI Bridge (Internal gfx)
00:06.0 PCI bridge: Advanced Micro Devices [AMD] nee ATI RS690 PCI to PCI Bridge (PCI Express Port 2)
00:11.0 SATA controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode]
00:12.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.1 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0 USB OHCI1 Controller
00:12.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.1 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0 USB OHCI1 Controller
00:13.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices [AMD] nee ATI SBx00 SMBus Controller (rev 3c)
00:14.1 IDE interface: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 IDE Controller
00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 LPC host controller
00:14.4 PCI bridge: Advanced Micro Devices [AMD] nee ATI SBx00 PCI to PCI Bridge
00:14.5 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control
01:05.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Radeon 2100
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
3）ifconfig eth0
pratik@Eureka:~$ ifconfig eth0:
eth0: Link encap:Ethernet HWaddr 6c:f0:49:dd:10:69
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:41
我希望这不是论坛上已经发布过的问题的重发。如果是，我深表歉意。
如果需要更多信息，请告诉我。
谢谢！
答案1
我在安装 MTNL 数据卡“3G Jadoo”时遇到了问题。我尝试使用 Tata photon。它会自动安装在 Ubuntu 12.10 中。我点击了右上角的网络徽标，然后就可以上网了。