USB mouse disconnects when laptop on battery

Hello,
I am using Gnome 3.6 on 3.6.10-1-ARCH. Whenever I run my laptop on battery power, my external usb mouse disconnects after some inactivity period. If I plug it to external power source, it again starts working fine.
I suspect there must something in gnome 3.6 (weird optimization) or something to do with laptop-tools which disconnects the usb mouse after some time of inactivity to save power. How to fix this.
I referred this link, but it did not provide me way to fix this.
https://bbs.archlinux.org/viewtopic.php?id=49503
https://bbs.archlinux.org/viewtopic.php?id=149530
Update: I noticed that I had not enabled laptop mode tools so problem must be with gnome3. I have now enabled this and set my USB mouse id in blacklist, so that it does not autosuspend. Still It is getting auto suspend.
Last edited by ameyjah (2013-01-06 16:38:09)

I imagine that your usb ports control is set to auto... which will suspend the device after a time of inactivity. The solution would be to have this not set to auto... though I am not sure how to do this with laptop-mode-tools in place. I don't use laptop-mode-tools, and it is my opinion that it actually makes things harder when you encounter things like this. Instead of learning where the configuration for this is within /sys and then creating the necessary configuration to change it, you now learn where it is in /sys, what is changing it automagically for you, then you have to learn the intricacies of that particualr power management tool.
So although I cannot help you with yout laptop-mode-tools, the file that sets this is /sys/bus/usb/devices/usb[1-9]/power/control or /sys/devices/pci0000:00/0000:00:1a.0/usb1/power without the symlinks on my machine for usb1.
Just my opinion, but with the power that comes in computers these days (for the past several years in fact), having something like laptop-mode-tools is pretty worthless. If you just have all the settings set as though it were on "battery" all the time, I bet there would be no discernible difference. I know I cannot tell, and then my computer probably charges ever so slightly faster because it is not set to consume more power when I plug it in.

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# Add rule to turn of autosuspend for specific mouse
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="045e", ATTR{idProduct}=="00cb", TEST=="power/control", ATTR{power/control}="on"
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[nikolai@niko-arch ~]$ cat /etc/laptop-mode/conf.d/usb-autosuspend.conf
# Configuration file for Laptop Mode Tools module usb-autosuspend.
# For more information, consult the laptop-mode.conf(8) manual page.
# USB autosuspend settings
#__COMMENT If you enable this setting, laptop mode tools will automatically enable the
#__COMMENT USB autosuspend feature for all devices.
#__COMMENT
#__COMMENT NOTE: Some USB devices claim they support autosuspend, but implement it in a
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#__COMMENT their LED completely off. If you have a device that misbehaves, add its USB ID
#__COMMENT to the blacklist below and complain to your hardware vendor.
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DEBUG=0
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Last edited by athal (2013-10-26 10:02:29)

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[me@mybox rules.d]$ ls
42-usb_power_save.rules 91-local.rules pci_pm.rules
80-net-name-slot.rules disable_wol.rules wifi_power_save.rules
[me@mybox rules.d]$ cat 42-usb_power_save.rules
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[me@mybox rules.d]$ cat 91-local.rules
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Last edited by replax (2013-10-27 08:59:30)

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****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

USB mouse disconnects when laptop on battery

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