topic Re: unable to initialize libusb : -99 in i.MX Processors

unable to initialize libusb : -99

0609ccj — Sat, 04 May 2019 12:40:16 GMT

I based on imx-yocto-L4.14.78_1.0.0_ga download the following content，the kernel version is linux4.9.67

$ mkdir imx-yocto-bsp
$ cd imx-yocto-bsp
$ repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-sumo -m
imx-4.14.78-1.0.0_ga.xml
$ repo sync

i add package usbutils. it's print error the following content when runing lsusb.

unable to initialize libusb : -99

my machine is imx6qdlsabresd, but I use linux4.1.44 is right. I use the same rootfs.

I don't know what fix this bug, who can help me.

thanks

terry_lv — Sun, 05 May 2019 02:38:06 GMT

Hi,

I havn't tried libusb on linux 4.14.78 before.

But in my experence, there're two points to fix this issue:

1. Enable debug log in libusb and rebuild libusb. Check what is the problem inside libusb.

2. libusb requires netlink socket to communicate with kernel. So define CONFIG_NETLINK_DIAG=y in defconfig and rebuild kernel may help.

Thanks!

Regards

Terry