Originally Posted by geekmaster
K4 (Kindle 4 non-touch) and K5 (Kindle touch) use the framebuffer in a different way than the K3 and earlier devices.
Been a few variations in the hardware eink drivers also:
root:cat$ grep 'drivers/video/eink' Amazon_2012.02.18_sha1.cat | sort --key=1.1,1.40 -u | wc -l
May take some time to sort out what are simply kernel-version changes and what are functional changes.
But going by the pathnames and filenames - there have been several __different__ driver organizations
True - the directFB layer is __supposed to__
hide those changes, but....