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I have been trying everything to get my Broadcom Wireless (4313) working on my Lenovo IdeaPad U410, but only with limited success.

This is the status:

  • tried brcmsmac driver of both the stock Ubuntu 12.04 kernel 3.2.0-26 and 3.5.0-030500rc6. Driver loads and card is detected (wlan0), but no wireless networks show up in network manager.

  • tried wl driver, both installed through jockey and manually installed from broadcom source. This makes it possible to connect to the network, but only has good speed when I put the laptop very close to one of my two access points. A few feet away already makes the bandwidth drop to virtually zero. (My sony laptop achieves maximum speeds even meters away from the access point).

So the questions are:

  • why does the brcmsmac show no networks?

  • why is the wl driver working but so limited?

Thanks for your support!

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Try this - askubuntu.com/a/126798/25798 – jokerdino♦ Jul 9 '12 at 9:47
had to remove brcmsmac modules and insmod b43. network card not detected. dmesg: Broadcom 43xx driver loaded [ features: PNL ]. – Fiepel Jul 9 '12 at 10:13
did you installed b43-fwcutter and firmware-b43-lpphy-installer – Web-E Jul 9 '12 at 10:19
yes. Somehow my card is not detected I think. also tried b43legacy but the same nothing. – Fiepel Jul 9 '12 at 10:28
installing firmware-b43* reports "unsupported Devices found: PCI id: 14e4:4727". I guess b43 driver is not suitable for my hardware. – Fiepel Jul 9 '12 at 11:05
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closed as too localized by fossfreedom♦ Jul 9 '12 at 19:41

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.

1 Answer

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Turns out that in my particular case I have a bad Wifi adapter. I re-installed windows 7 on this laptop and experienced the same problems. Even driver update did not help.

Seems to be a common problem that a lot of customers ran into. I exchanged my Lenovo for an Asus thanks to the excellent service of the shop where I bought it.

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I fixed mine by removing the wireless card and trying a new one. Everything worked fine, I put it back in and then it's been perfect on wl ever since. I have a Z750... – Joshua Siret Jul 26 '12 at 19:30
also that doesn't affect the warrenty – Joshua Siret Jul 26 '12 at 19:30

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