@Po-Hsu Have you tried the latest mainline kernel? http://kernel.ubuntu.com /~kernel-ppa/mainline/v3.16-utopic/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1346067 Title: [Dell Latitude E5440] O2 Card reader [1217:8520] is not stable on this system To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1346067/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs