Have been testing a new Asus N550JV laptop equipped with a Haswell 4700HQ cpu. Today I discovered that Knoppix 7.2 completely fails to detect SD cards inserted in the laptop's internal SD/MMC reader. The cards were an 8GB Sony class 10 SDHC and a class 10 64GB Lexar SDXC.

I was able to boot Knoppix from a flash install on the same Sony card when attached to the USB30 port via an external Delkin card reader. But I wasn't able to access the 64 GB card in the same reader when booted into Knoppix from a Live-DVD. The storage window kept intermittently flashing the type of the drive "64 GB ..." and the name of the first folder "Nikon800", but clicking on them was ineffective.

Under Windows 8, there were no issues reading either card from either the internal or the external slot.

Any suggestions of a fix would be welcome.