sys-usb trouble

[pixel fairy]

sys-usb has been giving me problems in the past couple days. whenever its restarted, it no longer talks to usb devices. the only solution ive found is rebooting the laptop. now, coming out of suspend its "on", but i couldnt even start a terminal in it. this might be the relevant log entry.

the last log from it,

No protocol specified
qrexec-policy: cannot connect to X server :0
eintr
Rpc allowed: sys-usb dom0 qubes.WindowIconUpdater
Rpc allowed: sys-usb dom0 qubes.InputMouse
Rpc allowed: sys-usb dom0 qubes.NotifyUpdates
Rpc allowed: sys-usb dom0 qubes.InputMouse

It could be hardware. its an old laptop (lenovo x201t) thats been through a lot. even simple web browsing hangs and gets slow and choppy. the battery only lasts 10 minutes.