Re: pm_op(): usb_dev_suspend+0x0/0x10 returns -2 on USB device 8087:0020

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Tuesday 23 February 2010, Ákos Maróy wrote:
> Hi,
> 
> I wonder if this is the write place to post this issue to, but I have a
> proplem when trying go suspend or hibernate my system. after enabling
> pm_trace by:
> 
> echo 1 > /sys/power/pm_trace
> 
> and then issuing pm-suspend, I get the following in dmesg:
> 
> [  685.833275] PM: Entering mem sleep
> [  685.833292] Suspending console(s) (use no_console_suspend to debug)
> [  685.993399] pm_op(): usb_dev_suspend+0x0/0x10 returns -2
> [  685.993404] PM: Device usb2 failed to suspend: error -2
> [  685.993408] PM: Some devices failed to suspend
> [  685.997009] PM: resume devices took 0.000 seconds
> [  685.997169] PM: Finishing wakeup.
> 
> this is on 2.6.32.8, but on 2.6.33-rc8 I get the same results.
> 
> trying to find out what device this is:
> 
> $ lsusb
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 003: ID 0bda:0159 Realtek Semiconductor Corp.
> Bus 001 Device 004: ID 04f2:b16c Chicony Electronics Co., Ltd
> Bus 001 Device 005: ID 03f0:231d Hewlett-Packard
> Bus 001 Device 002: ID 8087:0020
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> 
> my persumption is that "Device usb2" would be device 002 on bus 001
> above, that is, 8087:0020. googling for this USB id I found some
> references here: http://forum.notebookreview.com/showthread.php?p=5906076 :
> 
> Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
> 
> 
> I wonder what could be done to make this device not sabotage the suspend
> process?

That's a good question for the USB people (CCed).

Rafael