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  1. I've now completely removed the modules.conf file. Looks like it worked, I can reboot it now and it still detects the sensor, and I think a little bit faster than before. Thanks a lot for the tip! One thing I'm confused about though. I have already had g_serial and i2c-dev in my modules.conf before I even wired the ds18b20. After I first noticed the reboot problem I decided it wouldn't hurt to add the w1 lines there too, since I've seen some people do that. (I didn't know about the DT/modules.conf conflict) It's clear to me now that the modules should be handled by the DT. However, why did I encounter this problem in the first place with i2c-dev and g_serial only? Would those two cause any conflict for the w1 modules being loaded?
  2. Thank you. I think I've added those lines in the modules.conf after having this problem in the beginning, but I'll remove them and let you know how it goes.
  3. Thanks for the reply @martinayotte So, I should remove everything in /etc/modules-load.d/modules.conf and place them accordingly into /boot/armbianEnv.txt ? I need the i2c-dev for another sensor I have. How do I do this exactly? Thanks in advance.
  4. Hi everyone, What I want to do is to use a DS18B20 through 1-Wire to read temperature on an OPi Zero. The sensor seems to be detected by the board (I see the file under /sys/bus/w1/devices/28-something), and then it disappears randomly after a reboot or a power cycle. (file goes away and obviously I can't get any readings). Then it starts working randomly again after an indefinite amount of reboots. I'm having this problem for a while now, and it's driving me absolutely crazy. This one here on the picture is the sensor I'm using. I have attached a 4.7K Ohm resistor between the VCC and Digital cables, and attached to OPi Zero as follows: VCC -> BCM pin 2 (5V, I've also tried with 3.3V) Digital -> BCM pin 26 (PA10) Ground -> BCM pin 25 After that, I've edited my /boot/armbianEnv.txt and it looks like this now: verbosity=1 logo=disabled console=both disp_mode=1920x1080p60 overlay_prefix=sun8i-h3 overlays=usbhost2 usbhost3 i2c0 i2c1 w1-gpio param_w1_pin=PA10 param_w1_pin_int_pullup=0 rootdev=UUID=374d182b-7b9e-4570-b7c5-519a1eb837a7 rootfstype=ext4 usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u0x2537:0x1066:u,0x2537:0x1068:u0x2537:0x1066:u,0x2537:0x1068:u Also adapted the /etc/default/cpufrequtils file as follows: # WARNING: this file will be replaced on board support package (linux-root-...) upgrade ENABLE=true MIN_SPEED=480000 MAX_SPEED=1200000 GOVERNOR=interactive And the /etc/modules-load.d/modules.conf: g_serial i2c-dev w1-gpio w1-therm So, after all these modifications, I do a reboot and I can see the w1_gpio and w1_therm modules loaded in the output from lsmod, and I can see the device in /sys/bus/w1/devices/28-something I can get my readings and everything works properly. Then, I do a reboot. Here is where I get super confused, because it seems like there's no systematic error in the wiring or the kernel modules being loaded as far as I can see. But, the device disappears after the reboot. Sometimes it will get detected again, without me doing any changes in the configuration. I've already tried two of the same sensor, but it doesn't seem to make any difference, same problem still. I've also put the armbianmonitor output to the post. Looking desparately for some ideas to help me debug this problem. Thanks!