I want to buy a ARM based Netbook (Herkules eCafé Slim HD) with ARM Cortex A8 Freescale i.MX515.
The Netbook comes preinstalled with Ubuntu, I guess 10.04. Is this ARM Controller still supported in Precise?
This is confirmed by the citation.
Looking at the Ubuntu ARM Roadmap 12.04 official support is:
Thus - again your iMX51 series is not officially supported.
You'll note that the latest beta CD images contain a release for the iMX53 but not for the iMX51 series.
Thus - its your choice - try before you buy or look for a iMX53 ARM laptop instead.