[Bug 614274] Re: modem-manager fails to recognize 3G modem after suspend/resume

[DSHR]

On a Thinkpad X61 I saw the following behaviour:

Returning from suspend lsusb does not show the modem - so no modem
available in nw-manager.

After switching off wireless with the slide on the front the modem was
shown in lsusb. After switching on networking it is avalable in nm-
applet.

Maybe it is a good idea to be more careful when going to sleep to power
down the modem? The LED ist the last one blinking when going into
suspend mode ...

Some snippets from dmesg:


[34362.032119] PM: resume of drv:usb dev:usb6 complete after 247.943 msecs
[34362.034202] sd 2:0:0:0: [sda] Starting disk
[34362.268152] usb 6-1: reset full speed USB device using uhci_hcd and address 26
???
[34362.468225] sierra 6-1:1.0: no reset_resume for driver sierra?
[34362.468371] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0
[34362.468438] sierra ttyUSB1: Sierra USB modem converter now disconnected from ttyUSB1
[34362.468501] sierra ttyUSB2: Sierra USB modem converter now disconnected from ttyUSB2
[34362.468517] sierra 6-1:1.0: device disconnected
[34362.468522] PM: resume of drv:usb dev:6-1 complete after 364.866 msecs
[34362.468545] PM: resume of devices complete after 2028.007 msecs
[34362.468566] sierra 6-1:1.0: Sierra USB modem converter detected
[34362.469307] usb 6-1: Sierra USB modem converter now attached to ttyUSB0


modem not recognized:
[34106.740417] Registered led device: iwl-phy0::TX
[34106.753084] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[34106.884031] usb 6-1: new full speed USB device using uhci_hcd and address 21
[34107.008397] usb 6-1: device descriptor read/64, error -71
[34107.232054] usb 6-1: device descriptor read/64, error -71
[34107.448094] usb 6-1: new full speed USB device using uhci_hcd and address 22
[34107.568083] usb 6-1: device descriptor read/64, error -71
[34107.792105] usb 6-1: device descriptor read/64, error -71
[34108.008072] usb 6-1: new full speed USB device using uhci_hcd and address 23
[34108.420268] usb 6-1: device not accepting address 23, error -71
[34108.532174] usb 6-1: new full speed USB device using uhci_hcd and address 24
[34108.948098] usb 6-1: device not accepting address 24, error -71
[34108.948136] hub 6-0:1.0: unable to enumerate USB device on port 1

-- 
modem-manager fails to recognize 3G modem after suspend/resume
https://bugs.launchpad.net/bugs/614274
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