[twobob]

hmm... okay here are the differences


Unlike K3 and older which default to 4 bits/pixel, the new K4 and Touch use 8 bits/pixel.

Where the K3 and earlier 6-inch screen models used 300 bytes/row in 600x800 portrait mode, the K4 uses 600 bytes/row


K4 (non-touch):

Spoiler:

finfo:
id=eink_fb
smem_start=d0b8e000
smem_len=966656
type=0
type_aux=0
visual=5
xpanstep=0
ypanstep=0
ywrapstep=0
line_length=600
mmio_start=00000000
mmio_len=0
accel=0

vinfo:
xres=600
yres=800
xres_virt=600
yres_virt=800
xoffset=0
yoffset=0
bitsperpixel=8
grayscale=1
nonstd=0
activate=2
height=121
width=91
flags=0
pixclk=0
lmargin=0
rmargin=0
umargin=0
bmargin=0
hsync_len=0
vsync_len=0
sync=0
vmode=0

K3 (Keyboard):

Spoiler:

finfo:
id=eink_fb
smem_start=d08a8000
smem_len=483328
type=0
type_aux=0
visual=5
xpanstep=0
ypanstep=0
ywrapstep=0
line_length=300
mmio_start=00000000
mmio_len=0
accel=0

vinfo:
xres=600
yres=800
xres_virt=600
yres_virt=800
xoffset=0
yoffset=0
bitsperpixel=4
grayscale=1
nonstd=0
activate=2
height=121
width=91
flags=0
pixclk=0
lmargin=0
rmargin=0
umargin=0
bmargin=0
hsync_len=0
vsync_len=0
sync=0
vmode=0
rotate=0

Let me go check that on my 4 and 3.