Hi,

wifi device

  Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g
  [14e4:4315] (rev 01)

as found in Lenovo Ideapad S10e isn't supported by neighter
b43 nor bcm43xx kernel module.

Using linux STA drivers from Broadcom

  http://www.broadcom.com/support/802.11/linux_sta.php

one can compile a module named

  wl.ko

which just works fine.

Install instructions for 32bit:

  http://jomcode.com/fadhil/?p=59

  apt-get update
  apt-get install linux-headers-$(uname -r)

  wget -qO-
  http://www.broadcom.com/docs/linux_sta/hybrid-portsrc-x86-32_5_10_27_11.tar.gz
  | tar xz make -C /usr/src/linux-headers-$(uname -r) M=$(pwd)

  rmmod bcm43xx ; rmmod b43 ; rmmod b43legacy ; modprobe
  ieee80211_crypt_tkip ; insmod ./wl.ko

Voila.

Thanks mika for your patience at #grml :)

Greetings,
Marcel.

-- 
Registrierter Linux User #307343