I did an additional test to determine if psmouse's lost synchronization
errors were the cause of the random freezes.
I blacklisted the psmouse kernel module at /etc/modprobe.d/ and
eventually my laptop froze until I pressed a key. Unfortunately, there
were not any error messages either on dmesg or /var/log/messages.
So the problem does not reside on psmouse kernel module. I think that
some people complaining about these errors all over the Internet may be
facing the same problem than me but masked by the psmouse's lost sync
To UNSUBSCRIBE, email to debian-kernel-REQUEST@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact firstname.lastname@example.org