Installing Trisquel 7.0 on my desktop, I was receiving regular freezes of the x display with the error "nouveau failed to idle channel". An issue I've had before with this graphics card on other distros. After updating my kernel with the package linux-generic-lts-utopic, and the problem still being present, I tried wily. It seems this fixed things, I've been using it for some time now with no freezes. However it has created two other even more annoying issues that don't occur when I boot with the older kernels from grub:
I can't use my normal wireless USB keyboard on the boot screen where I enter my passphrase, another wireless USB keyboard works (it's a mini, so not good for normal use). All I can find, for the same issue on Ubuntu, is installing the initramfs-tools package. However doing this on Trisquel did not work. Network connectivity just stops working after a few minutes. I've still got an assigned IP using ifconfig, but I cannot access anything on my own network or the internet. It's not a DHCP issue as I've tried things on my local network which I usually access with an IP. Thanks for any help!