It's the BCM43xx chipset. See below... guest@guest:~$ lspci 00:00.0 Host bridge: Intel Corporation 82845G/GL/GE/PE DRAM Controller/Host-Hub Interface (rev 01) 00:02.0 VGA compatible controller: Intel Corporation 82845G/GL/GE Chipset Integrated Graphics Device (rev 01) 00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01) 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81) 00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 01) 00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01) 00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01) 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01) 01:04.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 IEEE 1394 OHCI Controller (rev 80) 01:05.0 Communication controller: Conexant Systems, Inc. Device 2702 (rev 01) 01:06.0 Network controller: Broadcom Corporation BCM4318 802.11g Wireless LAN Controller (rev 02) 01:09.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev 01) guest@guest:~$

Same problem, but couldn't find the open source Broadcom drivers for Wireless network card.