[ubuntu] No wireless adapter detect ubuntu 9.04

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http://ubuntuforums.org – I installed ubuntu 9.04 version in my Dell System XPS L502X i cannot connect to the wireless network but i can connect to the wired network. i dont think my wireless card is detected .. The output of lspci command is 00:00.0 Host bridge: Intel Corporation Device 0104 (rev 09) 00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Device 0116 (rev 09) 00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04) 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Ho (Hardware)