0

I have some trouble with usb autosuspend and found that with extlinux you can change the config file to disable it. So I added usbcore.autosuspend=-1 to the APPEND line 

 APPEND ${cbootargs} usbcore.autosuspend=-1

However when I cat /sys/module/usbcore/parameters/autosuspend after a reboot it still reports 2.

How can I apply the changes or is there something I am doing wrong

The device is a Nvidia Jetson Xavier

Starlight_NL
  • 1
  • 1

1 Answers1

0

If usbcore is loaded as a kernel module (see lsmod | grep ^usbcore), then you might instead add a .conf file in /etc/modprobe.d/ directory, e.g. /etc/modprobe.d/usboptions.conf, with the following contents:

options usbcore autosuspend=-1

If the system uses initramfs, the usbcore may be loaded before the real root filesystem is mounted and the system is still running form initramfs, and so you'll need to update/regenerate your initramfs file. Since the Jetson Xavier's OS image seems to be derived from Ubuntu, try sudo update-initramfs -u for regenerating your initramfs file.

telcoM
  • 96,466
  • I tried this and but /sys/module/usbcore/parameters/autosuspend still reports a 2. I can sort of solve it by setting it to -1 via /etc/rc.local since the power to the usb hubs I use are turned on later so the edited autosuspend value will be used. But I rather have it working via the official way – Starlight_NL Apr 08 '20 at 10:13