I'm not able to load a driver for a TFT display permanently on a Raspberry with Raspbian OS like specified here:
fbtft_device name=sainsmart18 verbose=0
in /etc/modules.
Whenever I restart the Raspberry and do
lsmod
the module is gone. However, setting it up manually with
sudo modprobe fbtft_device name=sainsmart18
works perfectly. Does anyone know why?
Output lsmod:
Module Size Used by
cfg80211 420690 0
rfkill 16659 2 cfg80211
8192cu 528485 0
pl2303 8340 0
usbserial 22429 1 pl2303
snd_soc_bcm2708_i2s 6701 0
regmap_mmio 2969 1 snd_soc_bcm2708_i2s
snd_soc_core 132622 1 snd_soc_bcm2708_i2s
snd_compress 7736 1 snd_soc_core
bcm2835_gpiomem 2995 0
snd_pcm_dmaengine 3287 1 snd_soc_core
spi_bcm2835 7248 0
i2c_bcm2708 5014 0
joydev 9047 0
evdev 10232 6
uio_pdrv_genirq 2966 0
uio 8235 1 uio_pdrv_genirq
i2c_dev 6047 0
snd_bcm2835 19769 3
snd_pcm 74825 3 snd_bcm2835,snd_soc_core,snd_pcm_dmaengine
snd_timer 18157 1 snd_pcm
snd 52116 11 snd_bcm2835,snd_soc_core,snd_timer,snd_pcm,snd_compress
fuse 81710 3
ipv6 339514 32
Output lsmod after sudo modprobe fbtft_device name=sainsmart18:
Module Size Used by
fb_st7735r 3372 0
fbtft_device 27517 0
fbtft 27628 2 fb_st7735r,fbtft_device
fb_sys_fops 1149 1 fbtft
syscopyarea 2789 1 fbtft
sysfillrect 3313 1 fbtft
sysimgblt 1837 1 fbtft
cfg80211 420690 0
rfkill 16659 2 cfg80211
pl2303 8340 0
8192cu 528485 0
usbserial 22429 1 pl2303
snd_soc_bcm2708_i2s 6701 0
regmap_mmio 2969 1 snd_soc_bcm2708_i2s
snd_soc_core 132622 1 snd_soc_bcm2708_i2s
snd_compress 7736 1 snd_soc_core
snd_pcm_dmaengine 3287 1 snd_soc_core
spi_bcm2835 7248 0
i2c_bcm2708 5014 0
bcm2835_gpiomem 2995 0
uio_pdrv_genirq 2966 0
uio 8235 1 uio_pdrv_genirq
joydev 9047 0
evdev 10232 6
i2c_dev 6047 0
snd_bcm2835 19769 3
snd_pcm 74825 3 snd_bcm2835,snd_soc_core,snd_pcm_dmaengine
snd_timer 18157 1 snd_pcm
snd 52116 11 snd_bcm2835,snd_soc_core,snd_timer,snd_pcm,snd_compress
fuse 81710 3
ipv6 339514 32
Update:
I did
dmesg
and there is an error:
[ 4.813718] systemd[1]: systemd-modules-load.service: main process exited, code=exited, status=1/FAILURE
[ 4.847789] systemd[1]: Failed to start Load Kernel Modules.
I investigated further with
pi@raspberrypi ~ $ sudo systemctl status systemd-modules-load.service
The output is
systemd-modules-load.service - Load Kernel Modules
Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static)
Active: failed (Result: exit-code) since Sun 2015-10-25 17:50:23 UTC; 15min ago
Docs: man:systemd-modules-load.service(8)
man:modules-load.d(5)
Process: 86 ExecStart=/lib/systemd/systemd-modules-load (code=exited, status=1/FAILURE)
Main PID: 86 (code=exited, status=1/FAILURE)
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
name=sainsmart18
when you do the manual modprobe, andname=adafruit22
when you add it to /etc/modules? What happens if you addfbtft_device name=sainsmart18
to your/etc/modules
? – Phil B. Oct 25 '15 at 3:24modprobe
. I have addedfbtft_device name=sainsmart18
to/etc/modules
, but the module doesn't show up when I reboot and dolsmod
. Withmodprobe
the screen of the TFT also turns black, which is an indicator that it actually works. Screen stays white when I just addfbtft_device name=sainsmart
in/etc/modules
. – user3255061 Oct 25 '15 at 11:33nano -w /etc/modprobe.d/blacklist
to check. Can you also post the output oflsmod
andmodprobe --list
? – Phil B. Oct 25 '15 at 12:09lsmod
, but there is nomodprobe --list
("unrecognized option '--list'). Thanks a lot for your help, I really appreciate it. – user3255061 Oct 25 '15 at 14:31