Comment 202 for bug 585765

I've been running freeze free for about 5-6 weeks now. I tried a lot of stuff suggested in the comments - new kernels, kernel options, removing pulseaudio, etc...

Some of them resulted in no freeze for about a week but they always came back.

Finally I read in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/546871 about problems with freezes with Atheros network cards. I have a Atheros in my laptop. I found that if I disable the wireless adapter (I use a wired connection 99% of the time anyway) via Network Manager that I get no freezes.

Searching for more issues with Arheros leads to bug 426130. I haven't tired the backport fix listed there yet, but I'm confident it is something in the Network stack for me:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/426130