I have Ubuntu 10.04 running in a VMware player virtual machine. How do I access the SD card reader hardware from within the VM? I see no appropriate device under
/dev or relevant messages with
SD card readers (either internal or external) are usually connected via USB buses. So, all you need to do is redirect the appropriate USB device to the VMware guest.
AFAIR the default settings for desktop VMware products provide for automatic USB device connection to a guest provided the guest in question has focus. If the reader does not appear in the guest Ubuntu when you insert the card while the guest is in fullscreen please check the USB virtual device settings of the guest.