If you use Ubuntu 9.10 Karmic Koala, please read this first (thanks Pjotr!):In 9.10 Karmic Koala, there's the same problem with acer_wmi as in 9.04.However, your 9.04 fix causes instability in the kernel, in 9.10. That's because the blacklisting should be done by editing the existing /etc/modprobe.d/blacklist.conf. And not by creating a new file named blacklist.Blacklist.conf by default already contains a list of blacklisted kernel modules. You can simply add the following lines for acer_wmi:# switch the wireless chipset onblacklist acer_wmiOriginal Post:The new kernel in the beta release of Ubuntu...