Take a look at this bug report which might be a duplicate of this. Unfortunately, no fix available yet.
https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/300693 -- Lenovo X61 hangs with flashing caps lock LED. https://bugs.launchpad.net/bugs/303276 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
