| 2020-07-31 18:58:37 |
Kyle Nitzsche |
bug |
|
|
added bug |
| 2020-07-31 18:58:37 |
Kyle Nitzsche |
attachment added |
|
kyle.o https://bugs.launchpad.net/bugs/1889926/+attachment/5397526/+files/kyle.o |
|
| 2020-07-31 19:01:21 |
Kyle Nitzsche |
description |
On released (and apt updated) 20.04 armhf preinstalled server on Pi3B+, we cannot use pigpio C program to access memory map for gpio.
ubuntu@ubuntu:~$ sudo ./pigpio/kyle.o
2020-07-31 18:36:11 initPeripherals: mmap gpio failed (Operation not permitted)
Details on code below, but the executable is attached, and the customer says this fairly represents their code usage.
ubuntu@ubuntu:~/pigpio$ uname -a
Linux ubuntu 5.4.0-1015-raspi #15-Ubuntu SMP Fri Jul 10 05:37:25 UTC 2020 armv7l armv7l armv7l GNU/Linux
We thought perhaps these kernel configs were involved:
CONFIG_DEVMEM=y
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
... and we modified the kernel cmdline with the following, but the result was the same.
iomem=relaxed strict-devmem=0
The program is simply this https://github.com/joan2937/pigpio/ with make & make install
then this c file:
#include <pigpio.h>
#include <stdio.h>
#include <stdlib.h>
int main(void){
gpioInitialise();
}
built with gcc -Wall -I/home/ubuntu/pigpio -pthread -o kyle.o kyle.c -lpigpio -lrt |
On released (and apt updated) 20.04 armhf preinstalled server on Pi3B+, we cannot use pigpio C program to access memory map for gpio. Customer says the same code works fine on 18.04.
ubuntu@ubuntu:~$ sudo ./pigpio/kyle.o
2020-07-31 18:36:11 initPeripherals: mmap gpio failed (Operation not permitted)
Details on code below, but the executable is attached, and the customer says this fairly represents their code usage.
ubuntu@ubuntu:~/pigpio$ uname -a
Linux ubuntu 5.4.0-1015-raspi #15-Ubuntu SMP Fri Jul 10 05:37:25 UTC 2020 armv7l armv7l armv7l GNU/Linux
We thought perhaps these kernel configs were involved:
CONFIG_DEVMEM=y
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
... and we modified the kernel cmdline with the following, but the result was the same.
iomem=relaxed strict-devmem=0
The program is simply this https://github.com/joan2937/pigpio/ with make & make install
then this c file:
#include <pigpio.h>
#include <stdio.h>
#include <stdlib.h>
int main(void){
gpioInitialise();
}
built with gcc -Wall -I/home/ubuntu/pigpio -pthread -o kyle.o kyle.c -lpigpio -lrt |
|
| 2020-07-31 19:05:27 |
Jon Watson |
bug |
|
|
added subscriber Jon Watson |
| 2020-07-31 19:05:53 |
Terry Rudd |
bug |
|
|
added subscriber Terry Rudd |
| 2020-08-03 05:41:20 |
Juerg Haefliger |
nominated for series |
|
Ubuntu Focal |
|
| 2020-08-03 05:41:20 |
Juerg Haefliger |
bug task added |
|
linux-raspi (Ubuntu Focal) |
|
| 2020-08-03 05:41:27 |
Juerg Haefliger |
linux-raspi (Ubuntu): status |
New |
Invalid |
|
| 2020-08-03 05:41:46 |
Juerg Haefliger |
linux-raspi (Ubuntu Focal): status |
New |
Triaged |
|
| 2020-08-03 13:45:48 |
Juerg Haefliger |
linux-raspi (Ubuntu Focal): status |
Triaged |
Confirmed |
|
| 2020-08-05 08:29:02 |
Juerg Haefliger |
linux-raspi (Ubuntu Focal): status |
Confirmed |
Invalid |
|
| 2020-08-05 14:41:07 |
Jon Watson |
bug watch added |
|
https://github.com/joan2937/pigpio/issues/375 |
|
