C640 "frozen" without internet connection




If you have any laptops with Atheros AR8152 network adapters are likely to experience freezing when installed Debian linux derivative such as Ubuntu, LinuxMint, etc. I have proved it on the laptop which Thosiba Satellite C640D sepesifikasi network controller is Atheros.

Wireless Brand, Model and Wireless Chipset:
code :
$ lspci - nn | grep "Atheros"
02:00.0 Network controller [0280]: Atheros Communications Inc.. AR9285 Wireless Network Adapter (PCI-Express) [168c: 002b] (rev 01)
06:00.0 Ethernet controller [0200]: Atheros Communications AR8152 v2.0 Fast Ethernet [1969:2062] (rev c1)

Version :
code :
$ Lsb_release-d
Description: Ubuntu 11:10

Kernel/architecture (including 32 vs. 64 bit):
code :
$ Uname-mr
3.0.0-12-generic x86_64

If your laptop is frozen when the network is unplugged and has a network controller as above, there are easy ways to overcome them.

  1. Turn on the laptop and then press F2 to enter BIOS.
  2. Select Boot Options and Select lan as the first boot.
  3. Press F10 to exit and save.

Now your laptop will not freeze when Lan Network unplugged.




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