You can show the bios version, which is currently installed, by typing:

michael@ideapad:~$ sudo dmidecode -s bios-version
2ACN21WW  

The current bios version which is available from Lenovo is: 2ACN37WW

Did anybody encounter these problems with bios version 2ACN37WW?
Is this a good BIOS version or does it still have some annoying bugs?

Any experiences with BIOS versions between 2ACN21WW and the newest
available one are also highly appreciated.

Some people reported success with the "Reboot -> F2 -> F9 (load default BIOS 
settings) -> F10 (save & exit)" workaround.
With which bios version did that work?

I am currently looking for a way how to safely upgrade the BIOS without
the need to install Windows.

The first thing I am going to try is to backup the currently installed BIOS.
Reading the BIOS image is unlikely to brick my netbook, but it is a first test, 
if accessing the BIOS image works well.

My first tries using a BartPE CD were not successful, because the
WinPhlash utility shipped with the 2ACN37WW.exe file (MD5SUM:
c510bc34109684289e8ec30079b6916c) from Lenovo could not find a file and
exited.

If anybody here has a backup of 2ACN21WW, saved from WinPhlash started from 
Windows, please simply report the MD5SUM of the backup file.
This would be beneficial because then I could compare it with my results when I 
got a backup.

If that succeeds, I will consider to try upgrading to the newest
version.

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https://bugs.launchpad.net/bugs/577114

Title:
  Wireless and Bluetooth switch does not work correctly on lenovo
  ideapad s10-3

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