[ubuntu] working wireless card stopped working on dell laptop

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http://ubuntuforums.org – Hi I am got this issue on a laptop where the only OS is Ubuntu 11.04 64 bit. It had a wireless card which was working.Everything seems to be fine till today evening.Where after a reboot I lost my wireless connectivity. I checked the logs etc so from a previous date i.e. when the wireless card was working I used to see following lines Code: Jan  8 10:12:37 rin kernel: [    0.646120] pci 0000:0c:00.0: [14e4:4315] type 0 class 0x000280 Jan  8 10:11:06 rin kernel: [  13.554056] wl: module license 'MIXED/Proprietary' taints kernel. Jan  2 12:20:50 r (Hardware)