I've created a new hybrid kernel based on GNU Mach [1] and GNU Linux-libre. With this kernel I can use Mach IPC on my Trisquel system. The Sourcecode ist hosted at [2]. [1] http://www.gnu.org/software/hurd/microkernel/mach/gnumach.html [2] https://gitorious.org/linux-libre-gnumach Tobias Platen