After installing Trisquel 7 I got four kernel panics for a unknown reason.
I installed a newer kernel fromhttp://linux-libre.fsfla.org/pub/linux-libre/freesh/ freesh/main linux-image-3.18.1-gnu amd64 3:1.0 [57,0 MB]
but this kernel is not a realtime kernel. The old kernel is3.13.0-40-lowlatency #69+7.0trisquel2 SMP PREEMPT Wed Nov 26 13:03:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux