1.  Blacklisting ath_pci did result in the above "Unknow symbol" lines no longer appearing in the output of dmesg. I opened the file /etc/modprobe.d/blacklist

sudo gedit /etc/modprobe.d/blacklist

and add the following line to the end of the file: blacklist ath_pci to have ath_pci blacklisted.

Save the file and Reboot.

2.  Check dmesg messages:

dmesg | grep -i ath

3.  Check loaded modules:

lsmod | grep ath

4.  Check your linux release:

lsb_release -a

5.  Check your kernel:

uname -a

6. SCP example

scp /home/efkerani/Downloads/madwifi-hal-0.10.5.6-r4103-20100110.tar.gz This email address is being protected from spambots. You need JavaScript enabled to view it. :.

7. TAR.GZ   EXTRACT

tar xzvf myfonts.tar.gz

8. Rename blaclist file to blacklist.conf (to avoid the errors)

sudo cat /etc/modprobe.d/blacklist >> /etc/modprobe.d/blacklist.conf && sudo rm /etc/modprobe.d/blacklist