wired ethernet interface not detected by lshw, lspci

I have a Toshiba Satellite PSAG8U-04001W. No eth* interface shows up on ifconfig. $ ifconfig -a lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:32 errors:0 dropped:0 overruns:0 frame:0 TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2544 (2.4 KiB) TX bytes:2544 (2.4 KiB) wlan2 Link encap:Ethernet HWaddr 00:21:6b:d3:1b:dc inet addr:192.168.1.83 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::221:6bff:fed3:1bdc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27901 errors:0 dropped:0 overruns:0 frame:0 TX packets:18098 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:20958957 (19.9 MiB) TX bytes:3551000 (3.3 MiB) Even more surprinsingly, neither lshw nor lspci shows anything related to wired ethernet controller/adapter: lshw: $lshw -C network *-network description: Wireless interface product: WiFi Link 5100 vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan2 version: 00 serial: 00:21:6b:d3:1b:dc width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-4-amd64 firmware=8.83.5.1 build 33692 ip=192.168.1.83 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn resources: irq:45 memory:d4600000-d4601fff lspci: $lspci -nnk 00:00.0 Host bridge : Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: agpgart-intel 00:02.0 VGA compatible controller : Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: i915 00:02.1 Display controller : Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07) Subsystem: Toshiba America Info Systems Device [1179:ff1e] 00:1a.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1a.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1a.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: ehci_hcd 00:1b.0 Audio device : Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: snd_hda_intel 00:1c.0 PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 03) Kernel driver in use: pcieport 00:1c.1 PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 [8086:2942] (rev 03) Kernel driver in use: pcieport 00:1c.4 PCI bridge : Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 [8086:2948] (rev 03) Kernel driver in use: pcieport 00:1d.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1d.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1d.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1d.3 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: uhci_hcd 00:1d.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: ehci_hcd 00:1e.0 PCI bridge : Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93) 00:1f.0 ISA bridge : Intel Corporation ICH9M LPC Interface Controller [8086:2919] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] 00:1f.2 SATA controller : Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] [8086:2929] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: ahci 00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: i801_smbus 03:00.0 Network controller : Intel Corporation WiFi Link 5100 [8086:4232] Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1201] Kernel driver in use: iwlwifi 04:06.0 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller [1180:0832] (rev 05) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: firewire_ohci 04:06.1 SD Host controller : Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter [1180:0822] (rev 22) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: sdhci-pci 04:06.2 System peripheral : Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter [1180:0592] (rev 12) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: r592 04:06.3 System peripheral : Ricoh Co Ltd xD-Picture Card Controller [1180:0852] (rev 12) Subsystem: Toshiba America Info Systems Device [1179:ff1e] Kernel driver in use: r852 Why is my laptop's wired ethernet not showing? How can I debug this? The installation of Debian wasn't originally on this system: it was on an older laptop whose motherboard fried, so I rescued the hard drive as well as the Debian installation. However, I doubt this should have anything to do with lspci not even detecting the wired eth controller.