#186 Unable to import module, update cpuinfo?

[Joe Ho]

Hi Ben,

I have scripts to import RPI.GPIO module, it used to work fine, then all of sudden it stopped working.

It has the This module can only be run on a Raspberry Pi! error. I look at the code, it seems the cpuinfo has been updated/chagned. Here is my cpuinfo. BCM2711???????

processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 1
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 2
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

processor : 3
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

Hardware : BCM2711
Revision : c03111
Serial : 1000000091c50795
Model : Raspberry Pi 4 Model B Rev 1.1

[Ben Croston]

What version of RPi.GPIO are you using?

[Joe Ho]

0.7.0

/ # pip show rpi.gpio
Name: RPi.GPIO
Version: 0.7.0
Summary: A module to control Raspberry Pi GPIO channels
Home-page: http://sourceforge.net/projects/raspberry-gpio-python/
Author: Ben Croston
Author-email: ben@croston.org
License: MIT
Location: /usr/local/lib/python3.7/site-packages
Requires:
Required-by:

i did some googling, CPU always been BCM2711, but they didn't update cpuinfo until recently.

[Ben Croston]

What do you get when you:
$ cat /proc/device-tree/system/linux,revision

[Ben Croston]

Also:
$ hexdump /proc/device-tree/system/linux,revision

[Ben Croston]

Which distro are you using? Is it 64 bit?

[Joe Ho]

Sorry, I re-read the code, it seems like it's failing at:

if ((fp = fopen("/proc/device-tree/system/linux,revision", "r"))) {
uint32_t n;
if (fread(&n, sizeof(n), 1, fp) != 1) {
fclose(fp);
return -1;
}
sprintf(revision, "%x", ntohl(n));
found = 1;
}

I am using this inside a docker, /proc/device-tree/ is empty, symlink to sys/firmware is empty.

I wil try map it to see if it works. It used to work fine, not sure what has changed.

Thanks,
Joe

[Joe Ho]

Hosts = Raspbian buster
Docker = alpine

[Joe Ho]

putting the container in privileged mode fixes the issue. Not a clean fix, but will do for now. I will close the ticket. Thx.

[Joe Ho]

I can't close the ticket, only you can lol.