I have a USB audio device that has input and output from/to guitar. It gets power from USB. It was working all well before. But after recent updates, It's kind of half-working. The device only gets power when there is some audio is being playing in laptop or some input signal is sent from guitar. So, If I stop playing guitar for a second, it turns off and when I play again it goes on. I want to get continuous power. Is there any way I can fix this problem?
1 Answer
This question seems really simular: https://superuser.com/questions/408683/why-my-usb-mouse-gets-suspended-after-3-seconds-of-inactivity
You can check if you have the same issue as the one above by entering the command:
for i in /sys/bus/usb/devices/*/power/control; do echo on > $i; done
If this fixes your problem, you can make it permanent by editing /etc/laptop-mode/conf.d/usb-autosuspend.conf in scratch
sudo scratch-text-editor /etc/laptop-mode/conf.d/usb-autosuspend.conf
and replacing CONTROL_USB_AUTOSUSPEND="auto" by CONTROL_USB_AUTOSUSPEND=0
[Edit]
The permanent fix seems to have changed, if modprobe usbcore autosuspend=-1 doesn't do anything, you need to change the bootloader.
To do this, you have to open the GRUB config in scratch.
sudo scratch-text-editor /etc/default/grub and loof for a line that states GRUB_CMDLINE_LINUX_DEFAULT and add usbcore.autosuspend=-1 to that line.
The line will be something along the lines of this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1"
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This command above with the for loop enabled power for my guitar. But I could not locate usb-audosuspend.conf file, because path doesn't exist. I have put that first command in a file, and run it when I need to use that device. Permanent fix would be awesome.– dg_no_9Oct 14, 2015 at 14:17
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It might be in one of these files:
/etc/modprobe.conf,/etc/modprobe.d/modprobe.confor/etc/modprobe.d/options. Look foroptions usbcore autosuspend=1– JeroenOct 14, 2015 at 14:39 -
I have only /etc/modprobe.d/modesetting.conf file which has options in int. But there is no options for usbcore. Should I add options usbcore to this file or create a new file?– dg_no_9Oct 14, 2015 at 15:45
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No you should not have to create those files. Does the command
modprobe usbcore autosuspend=-1return anything?– JeroenOct 14, 2015 at 17:04 -
1@dg_no_9 No problem, I'm just a bit bussy today (deadlines ugh...) so I don't really have time right now. Will help you tomorrow :)– JeroenOct 15, 2015 at 15:10