Thanks to Jerome Brunet, there is now a fix for the long-standing Ethernet hang problem on the C2..   Details are here:   http://lists.infradead.org/pipermail/linux-amlogic/2016-November/001538.html

The patch is an attachment – named ‘attachment.bin‘, and so will need to be renamed to something appropriate..     I applied this to the 4.9-rc3-derived version of the C2 patched kernel, from https://git.kernel.org/cgit/linux/kernel/git/khilman/linux-amlogic.git/log/?h=v4.10/integ..    There is a ‘newer’ branch – ‘for-next‘ – but for some reason this does not include the Meson/GXBB MMC driver, and so is fairly useless..

With this patch, the Ethernet link is staying active at full speed, as it should..

Robert Gadsdon.   November 9, 2016.