Hi,
after upgrading to kernel 3.7.X (3.7.7) the Sierra MC 8790 doesn't connect anymore, 3.6.11 was the last kernel the Sierre module worked with.
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB0) closing serial port...
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB0) serial port closed
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB0) opening serial port...
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB1) closing serial port...
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB1) serial port closed
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB1) opening serial port...
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB1) closing serial port...
Feb 14 09:56:28 MClient020 modem-manager[2233]: <info> (ttyUSB1) serial port closed
Feb 14 09:56:30 MClient020 slapd_2.3[2577]: @(#) $OpenLDAP: slapd 2.3.40 (Jan 23 2013 14:06:30) $ ^I gentoo4:/usr/bbsrc/bbbuild/dev-pkg/std/portage/net-nds/openldap-2.3.40/work/openldap-2.3.
Feb 14 09:56:32 MClient020 crond[2604]: crond: crond (busybox 1.20.2) started, log level 8
Feb 14 09:56:32 MClient020 sudo: root : TTY=unknown ; PWD=/ ; USER=ldap ; COMMAND=/bin/slapcat_2.3 -c -f /etc/openldap/slapd.conf_2.3
Feb 14 09:56:34 MClient020 modem-manager[2233]: <info> (ttyUSB0) closing serial port...
Feb 14 09:56:34 MClient020 modem-manager[2233]: <info> (ttyUSB0) serial port closed
Feb 14 09:56:35 MClient020 modem-manager[2233]: <warn> Couldn't probe for capabilities, probably not a GSM or CDMA modem
Feb 14 09:56:35 MClient020 modem-manager[2233]: <info> (ttyUSB2) closing serial port...
Feb 14 09:56:35 MClient020 modem-manager[2233]: <info> (ttyUSB2) serial port closed
Feb 14 09:56:35 MClient020 modem-manager[2233]: <info> (ttyUSB3) opening serial port...
Feb 14 09:56:35 MClient020 modem-manager[2233]: <warn> (ttyUSB3): port attributes not fully set
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <warn> (ttyUSB3): failed to look up interface index
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): new GSM/UMTS device (driver: 'sierra' ifindex: 0)
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): exported as /org/freedesktop/NetworkManager/Devices/2
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): now managed
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): deactivating device (reason 'managed') [2]
Feb 14 09:56:35 MClient020 NetworkManager[2220]: <info> (ttyUSB3): device state change: unavailable -> disconnected (reason 'none') [20 30 0]
Feb 14 09:56:36 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: unlock no longer required
Feb 14 09:56:36 MClient020 modem-manager[2233]: <info> (ttyUSB3) closing serial port...
Feb 14 09:56:36 MClient020 modem-manager[2233]: <info> (ttyUSB3) serial port closed
Feb 14 09:56:48 MClient020 NetworkManager[2220]: <info> Activation (ttyUSB3) starting connection 'Mobilfunk'
Feb 14 09:56:48 MClient020 NetworkManager[2220]: <info> (ttyUSB3): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Feb 14 09:56:48 MClient020 NetworkManager[2220]: <info> Activation (ttyUSB3) Stage 1 of 5 (Device Prepare) scheduled...
Feb 14 09:56:48 MClient020 NetworkManager[2220]: <info> Activation (ttyUSB3) Stage 1 of 5 (Device Prepare) started...
Feb 14 09:56:48 MClient020 NetworkManager[2220]: <info> Activation (ttyUSB3) Stage 1 of 5 (Device Prepare) complete.
Feb 14 09:56:48 MClient020 modem-manager[2233]: <info> (ttyUSB3) opening serial port...
Feb 14 09:56:48 MClient020 modem-manager[2233]: <warn> (ttyUSB3): port attributes not fully set
Feb 14 09:56:48 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (disabled -> enabling)
Feb 14 09:56:48 MClient020 modem-manager[2233]: <info> (ttyUSB4) opening serial port...
Feb 14 09:56:48 MClient020 modem-manager[2233]: <warn> (ttyUSB4): port attributes not fully set
Feb 14 09:56:48 MClient020 modem-manager[2233]: <info> (ttyUSB3): using PDU mode for SMS
Feb 14 09:56:49 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabling -> enabled)
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <info> WWAN now enabled by management service
Feb 14 09:56:49 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabled -> registered)
Feb 14 09:56:49 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (registered -> connecting)
Feb 14 09:56:49 MClient020 modem-manager[2233]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (connecting -> registered)
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <warn> GSM connection failed: (32) No cause information available
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <info> (ttyUSB3): device state change: prepare -> failed (reason 'modem-no-carrier') [40 120 25]
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <warn> Activation (ttyUSB3) failed for connection 'Mobilfunk'
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <info> (ttyUSB3): device state change: failed -> disconnected (reason 'none') [120 30 0]
Feb 14 09:56:49 MClient020 NetworkManager[2220]: <info> (ttyUSB3): deactivating device (reason 'none') [0]
T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1199 ProdID=683c Rev=00.05
S: Manufacturer=Sierra Wireless, Incorporated
S: Product=Mini Card
C: #Ifs= 7 Cfg#= 1 Atr=e0 MxPwr=0mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
I: If#= 6 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=sierra
lsusb -v output:
http://www.hjit.de/priv/usb.out
best regards
Harald