I just installed linux-image-386 and the matching restricted-modules, now this doesn't happen anymore. I han happily close and reopen the lid multiple times withouth freezing. I have modified my /etc/acpi/lid.sh and /etc/acpi/videobtn.sh, but this shouldn't have an influence, since the freezes still happened with the generic kernel.
I just installed linux-image-386 and the matching restricted-modules, now this doesn't happen anymore. I han happily close and reopen the lid multiple times withouth freezing. I have modified my /etc/acpi/lid.sh and /etc/acpi/ videobtn. sh, but this shouldn't have an influence, since the freezes still happened with the generic kernel.