Tuning USB suspend [1] in 4.3 on a Dell XPS 15 9553 (Skylake), I see a
kworker thread spinning in rpm_suspend [2].
What is the most useful debug to get here beyond the immediate [3]?
Thanks,
Daniel
-- [1]
for i in /sys/bus/usb/devices/*/power/control; do
echo auto >$i
done
-- [2]
73.79% 0.09% kworker/1:1 [kernel.kallsyms]
[k] rpm_suspend
|
---rpm_suspend
|
|--99.48%-- __pm_runtime_suspend
| usb_runtime_idle
| __rpm_callback
| rpm_idle
| pm_runtime_work
| process_one_work
| worker_thread
| kthread
| ret_from_fork
|
--0.52%-- rpm_idle
__pm_runtime_idle
usb_autopm_put_interface
hub_event
process_one_work
worker_thread
kthread
ret_from_fork
-- [3]
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0a5c:6410 Broadcom Corp.
Bus 001 Device 003: ID 1bcf:2b95 Sunplus Innovation Technology Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ dmesg | grep -i usb
[ 0.000000] ACPI: SSDT 0x0000000037058168 00002B (v02 INTEL
UsbCTabl 00001000 INTL 20120913)
[ 0.405213] ACPI: bus type USB registered
[ 0.405228] usbcore: registered new interface driver usbfs
[ 0.405236] usbcore: registered new interface driver hub
[ 0.405254] usbcore: registered new device driver usb
[ 0.960977] xhci_hcd 0000:00:14.0: new USB bus registered, assigned
bus number 1
[ 0.961367] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.961395] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 0.961416] usb usb1: Product: xHCI Host Controller
[ 0.961431] usb usb1: Manufacturer: Linux 4.3.0-040300-generic xhci-hcd
[ 0.961458] usb usb1: SerialNumber: 0000:00:14.0
[ 0.961776] hub 1-0:1.0: USB hub found
[ 0.985253] xhci_hcd 0000:00:14.0: new USB bus registered, assigned
bus number 2
[ 0.985318] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[ 0.985344] usb usb2: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 0.985370] usb usb2: Product: xHCI Host Controller
[ 0.985385] usb usb2: Manufacturer: Linux 4.3.0-040300-generic xhci-hcd
[ 0.985404] usb usb2: SerialNumber: 0000:00:14.0
[ 0.985588] hub 2-0:1.0: USB hub found
[ 0.991260] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.991336] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.991401] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.294613] usb 1-4: new full-speed USB device number 2 using xhci_hcd
[ 1.424790] usb 1-4: New USB device found, idVendor=0a5c, idProduct=6410
[ 1.424791] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1.424792] usb 1-4: Product: BCM2045A0
[ 1.424793] usb 1-4: Manufacturer: Broadcom Corp
[ 1.424794] usb 1-4: SerialNumber: 606DC7C60B70
[ 1.590429] usb 1-12: new high-speed USB device number 3 using xhci_hcd
[ 1.726778] usb 1-12: New USB device found, idVendor=1bcf, idProduct=2b95
[ 1.726779] usb 1-12: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 1.726779] usb 1-12: Product: Integrated_Webcam_HD
[ 1.726780] usb 1-12: Manufacturer: CNFEH73I351030001BE2
[ 9.740570] usbcore: registered new interface driver btusb
[ 9.813788] input: Integrated_Webcam_HD as
/devices/pci0000:00/0000:00:14.0/usb1/1-12/1-12:1.0/input/input9
[ 9.813835] usbcore: registered new interface driver uvcvideo
[ 9.813836] USB Video Class driver (1.1.1)
[ 9.821529] usbcore: registered new interface driver brcmfmac
[ 9.976582] audit: type=1400 audit(1447675072.451:2):
apparmor="STATUS" operation="profile_load" name="/usr/sbin/ippusbxd"
pid=581 comm="apparmor_parser"
--
Daniel J Blueman
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