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Thread: USB Suspend (Powertop)

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so, other day running powertop, , asked me if wanted disable non-input usb devices or that. so, pressed u. now, whenever unplug ac on laptop, of usb devices stop working. 2 events related, or behaviour because of else?

on ac, open terminal in full screen:

dmesg | tail -f

pull plug watch messages scroll by.

plug in few usb devices, 1 @ time , observe additional messages.

powertop settings active during current, booted session. revert once reboot, unless make changes rc.local or other bootup script.

believe powertop disables hal's 2-second usb detection rule, can wake processor , use more power. believe it's timer culprit, not 2-second interval, have research more.

check bios settings. there may setting "allow usb devices wake computer" under power management. see if there other usb-related settings can set.


Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Hardware [ubuntu] USB Suspend (Powertop)


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