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Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,438

modem interface disappear after resume from suspend

I am using Dell Latitude E6230, with mobile broadband modem (wwan), this modem provides 3 interfaces for controlling it (/dev/ttyACM0 to 2). First interface /dev/ttyACM0 is used to initialize the modem. I connect to 3G internet through /dev/ttyACM1 using wvdial. After resume from suspend this interface disappear.

bsnl
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: AT+CFUN=1
AT+CFUN=1
OK
--> Modem initialized.
--> Configuration does not specify a valid phone number.
--> Configuration does not specify a valid login name.
--> Configuration does not specify a valid passwor
--> WvDial: Internet dialer version 1.61
--> Cannot open /dev/ttyACM1: No such file or directory
--> Cannot open /dev/ttyACM1: No such file or directory
--> Cannot open /dev/ttyACM1: No such file or directory

If I disconnect before suspend this doesn't happen.

I can still connect to 3G using another interface (/dev/ttyACM2),

There is no soft/hard block after resume from suspend

rfkill list
1: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: dell-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: dell-wwan: Wireless WAN
	Soft blocked: no
	Hard blocked: no
4: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

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