Nope, when running on noveau the error does not occur. However, as I noted before, it appears to be some strange interaction between the touchpad and the nvidia driver. After deactivating the touchpad functionality (setting it on mouse mode), the symptoms disappear as well.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1303739 Title: [Lenovo ThinkPad T520] Casual screen freeze in Xubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1303739/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
