[arch-general] Computer blocking due to kernel <-> userspace incompatibility?

Hello list Is it possible a computer gets stuck (not responding to keyboard, the only way to bring it back alive is a hard reset) because of a incompatibility between the kernel and userspace? The cursor is still flickering though, that is what leads me to believe it's software crash, not a hardware crash. This is the software in question: glibc 2.9-4 kernel-headers 2.6.27.6-2 kernel26 2.6.25.10-1 Thanks, Best regards, Glenn Matthys