I believe i have the same issues as you guys. I'm late but i have some information about this issue. At work i have different workstation : lenovo m90P, lenovo m91p and lenovo m93p.
The freeze occure for me only on the m91p. Now about the ubuntu version : The m91p work perfectly on ubuntu 11.10 The freeze append only after we migrate on ubuntu 12.04. I tried a lot thing (latest kernel, latest vieo drivers etc..), the only thing which work was the retro upgrade of the kernel from 3.2 to 3.0 hope that help -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1228109 Title: [Lenovo ThinkCentre M91p] System freezes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1228109/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs