The model I have is a DR1000S, so it has stylus input like the M92. Screen is slightly larger at 10.2 in. It does run Linux - this page gives you an idea of what has been done so far:
https://wiki.mobileread.com/wiki/Digital_Reader_Software
It's definitely a man-sized tablet, I don't think your daughter would like it - but it may be suitable for you, if you find that it fits your needs better than the M92.
Let me know if you have any questions.