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tlvince

Member

Registered: 2010-07-06

Posts: 68

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High power usage after resuming from suspend

I'm using powertop --auto-tune, which is working well to keep power usage down for the most part.

However, after resuming from suspend, my laptop's fan continually whirrs despite low system loads (load average 0.25).

Powertop is reporting 100% usage on audio, webcam and USB despite them not really being in use:

              Usage     Device name
            100.0%        Audio codec hwC0D2: Intel
              3.7%        CPU misc
              3.7%        DRAM
              3.7%        CPU core
              2.0 ops/s   GPU core
              2.0 ops/s   GPU misc
            100.0%        USB device: XiaoMi USB 2.0 Webcam (SunplusIT Inc)
            100.0%        USB device: usb-device-8087-0a2b
            100.0%        Radio device: iwlwifi
            100.0%        USB device: xHCI Host Controller

journalctl seems to show power control on those devices fails on wake:

Mar 18 11:59:39 arch kernel: xhci_hcd 0000:00:14.0: Cannot set link state.
Mar 18 11:59:39 arch kernel: usb usb2-port2: cannot disable (err = -32)
Mar 18 11:59:40 arch kernel: xhci_hcd 0000:00:14.0: Cannot set link state.
Mar 18 11:59:40 arch kernel: usb usb2-port2: cannot disable (err = -32)
Mar 18 11:59:40 arch kernel: xhci_hcd 0000:00:14.0: Cannot set link state.
Mar 18 11:59:40 arch kernel: usb usb2-port2: cannot disable (err = -32)

How might I fix this?