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NiLuJe · 04-04-2020, 01:58 PM

On a pure einkfb device, there's a dedicated (custom) ioctl: FBIO_EINK_SET_DISPLAY_ORIENTATION
It can also be accessed via procfs as such:

echo 14 2 > /proc/eink_fb/update_display

(See <einkfb.h> for the meaning behind the magic numbers. Or /etc/rc.d/functions, which also uses it).

I don't have the K4 plugged in to check, but that certainly works on a K3

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04-04-2020, 01:58 PM	#5
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	On a pure einkfb device, there's a dedicated (custom) ioctl: FBIO_EINK_SET_DISPLAY_ORIENTATION It can also be accessed via procfs as such: echo 14 2 > /proc/eink_fb/update_display (See <einkfb.h> for the meaning behind the magic numbers. Or /etc/rc.d/functions, which also uses it). I don't have the K4 plugged in to check, but that certainly works on a K3 . Last edited by NiLuJe; 04-04-2020 at 04:12 PM.