This is my first post on any linux forum it's not a query but a solution. I have a new MSI cr620 laptop with a sd card reader (ub6250) which did not function on Mint Debian. After looking around the internet I found the keucr driver. Which at first I could not get to compile on my debian system, however a solution is found here by Vladimir https://bugs.launchpad.net/linux/+bug/530277. note: 4 and 5 are in the wrong order. I have also managed to get the wireless working with little fuss. Mint Debian is now working very well and has not crashed. After 5 days It does seem or feel better than the normall linux mint but it was a little rough around the edges to start with.