fbtft modprobe ili9341 9bit remains black

[epidam (Gast)]

Hello
I try to use the modprobe like explained on 
https://github.com/notro/fbtft/wiki

It seems that driver is loaded, screen changes from white to black... 
but it remains always black. I am really frustrated now. (i use a modern 
new raspbian jessie with pixel)

with an overlay like "rpi-display" (modify buswidth=9bit) it works 
without problems, but I want use modprobe because I have other tfts with 
sitronix st7735, st7789v..etc. and I had difficult to create/find a 
overlay for these one.

Is there somewhere a correct step by step instruction for modprobe and 
modern raspbian jessie (pixel)?

please find here an example which is not working (for ili9341):

sudo modprobe fbtft_device custom name=fb_ili9341 buswidth=9 
speed=32000000 rotate=270 fps=30 gpios=reset:23,dc:24

dmesg

[ 41.792874] fbtft: module is from the staging directory, the quality is 
unknown, you have been warned.
[ 41.798172] fbtft_device: module is from the staging directory, the 
quality is unknown, you have been warned.
[ 41.799548] spidev spi0.0: spidev spi0.0 500kHz 8 bits mode=0x00
[ 41.799567] spidev spi0.1: spidev spi0.1 500kHz 8 bits mode=0x00
[ 41.799603] bcm2708_fb soc:fb: soc:fb id=-1 pdata? no
[ 41.799650] spidev spi0.0: Deleting spi0.0
[ 41.801070] fbtft_device: GPIOS used by 'fb_ili9341':
[ 41.801085] fbtft_device: 'reset' = GPIO23
[ 41.801095] fbtft_device: 'dc' = GPIO24
[ 41.801112] spidev spi0.1: spidev spi0.1 500kHz 8 bits mode=0x00
[ 41.801127] spi spi0.0: fb_ili9341 spi0.0 32000kHz 8 bits mode=0x00
[ 41.806421] fb_ili9341: module is from the staging directory, the 
quality is unknown, you have been warned.
[ 41.807627] fb_ili9341 spi0.0: 9-bit SPI not available, emulating using 
8-bit.
[ 42.124063] graphics fb1: fb_ili9341 frame buffer, 320x240, 150 KiB 
video memory, 16 KiB DMA buffer memory, fps=33, spi0.0 at 32 MHz
pi@raspberrypi:~ $

=> after this, display is getting from white to black.
and I could measure with a logger some data only for a short time 
coming.

FRAMEBUFFER=/dev/fb1 startx

or

con2fbmap 1 1

nothing, always black

than I try in config.txt

hdmi_force_hotplug=1
hdmi_cvt=320 240 60 1 0 0 0
hdmi_group=2
hdmi_mode=1
hdmi_mode=87

nothing, still black :-(???

change dev0 to dev1 in
/usr/share/X11/xorg.conf.d/.99.....

still black :-(

pi@raspberrypi:~ $
pi@raspberrypi:~ $ ls /dev/fb*
/dev/fb0 /dev/fb1
pi@raspberrypi:~ $

it seems that spi out is not working respectively is only switching ON 
for a short time? why?

[epidam (Gast)]

ich habe das Problem gefunden =>

nicht "startx"
sondern "sudo startx"

argg