I experienced exactly the same errors with a Dell E7450 which is practically the same one as the Dell E7250. I'm on Ubuntu 15.10
Went through all the kernels from 3.19 to 4.2 (http://kernel.ubuntu.com /~kernel-ppa/) and found out that until 4.1.8-040108-generic the SD card readers played fine and only after I put 4.1.9 and on I started getting the errors. For my tests I used a Sandisk ultra 64GB microSD with a sd slot adapter. Dexter1 can you verify? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1514821 Title: SD card reader on Dell E7250 doesn't work in Ubuntu 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514821/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs