[ubuntu] Unknown problem with Broadcom 4727

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http://ubuntuforums.org – I'm running Ubuntu 10.4 LTS on an Acer Aspire one d255e netbook. The netbook has a Broadcom Corporation wireless network controller (Model 4727, rev 01), and I cannot get it to work. "sudo lshw -c network" outputs (irrelevant information omitted): Code: *-network UNCLAIMED       description: Network controller       product: Broadcom Corporation       vendor: Broadcom Corporation       physical id: 0       bus info: pci@0000:02:00.0       version: 01       width: 64 (Hardware)