# Audio enabled WP7607 disconnects/reconnects two times for every at!reset **URL:** \ **Category:** WP Series\ **Created:** [June 2, 2020, 2:10pm UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509 "2020-06-02T14:10:35Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![shatrughan](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@shatrughan](https://forum.sierrawireless.com/u/shatrughan)\ **Post date:** [June 2, 2020, 2:10pm UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/1 "2020-06-02T14:10:35Z")
Hi, I noticed an strange behaviour with WP7607 module. When I do at!reset to the module, I could see its ttyUSBs disconnects and then reconnects. But after few seconds later it again disconnects and reconnects. seems like double reset. How can I make it reset only once? Please help ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [June 2, 2020, 3:08pm UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/2 "2020-06-02T15:08:03Z")
Do you see double reset in uart debug message? Do you see connect twice in linux host pc? ---
**Author:** ![shatrughan](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@shatrughan](https://forum.sierrawireless.com/u/shatrughan)\ **Post date:** [June 2, 2020, 5:34pm UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/3 "2020-06-02T17:34:37Z")
What I see is two times ttyUSB disconnect and two times connect in linux syslog ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [June 3, 2020, 1:49am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/4 "2020-06-03T01:49:09Z")
I don’t see problem with the following command in Ubuntu 14: sudo echo “AT\_RESET\_command\_now” \> /dev/kmsg; sudo echo -ne “AT\x21reset\xd\xa” \> /dev/ttyUSB2 In dmesg, I can see the following: * * * [3063722.056318] AT\_RESET\_command\_now [3063722.327968] usb 3-3: USB disconnect, device number 70 [3063722.328341] GobiSerial driver ttyUSB0: GobiSerial converter now disconnected from ttyUSB0 [3063722.328386] GobiSerial 3-3:1.0: device disconnected [3063722.328744] GobiSerial driver ttyUSB1: GobiSerial converter now disconnected from ttyUSB1 [3063722.328779] GobiSerial 3-3:1.2: device disconnected [3063722.329117] GobiSerial driver ttyUSB2: GobiSerial converter now disconnected from ttyUSB2 [3063722.329158] GobiSerial 3-3:1.3: device disconnected [3063722.329287] cdc\_ether 3-3:1.19 usb0: unregister ‘cdc\_ether’ usb-0000:00:14.0-3, CDC Ethernet Device [3063743.123960] usb 3-3: new high-speed USB device number 71 using xhci\_hcd [3063743.147028] usb 3-3: config 1 has an invalid interface number: 19 but max is 4 [3063743.147044] usb 3-3: config 1 has an invalid interface number: 20 but max is 4 [3063743.147055] usb 3-3: config 1 has an invalid interface number: 20 but max is 4 [3063743.147064] usb 3-3: config 1 has no interface number 1 [3063743.147073] usb 3-3: config 1 has no interface number 4 [3063743.155011] usb 3-3: New USB device found, idVendor=1199, idProduct=68c0 [3063743.155024] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [3063743.155032] usb 3-3: Product: Sierra Wireless WP7607 [3063743.155040] usb 3-3: Manufacturer: Sierra Wireless, Incorporated [3063743.155048] usb 3-3: SerialNumber: VN73048508010300 [3063743.157020] GobiSerial 3-3:1.0: GobiSerial converter detected [3063743.157075] usb 3-3: GobiSerial converter now attached to ttyUSB0 [3063743.158044] GobiSerial 3-3:1.2: GobiSerial converter detected [3063743.158085] usb 3-3: GobiSerial converter now attached to ttyUSB1 [3063743.159995] GobiSerial 3-3:1.3: GobiSerial converter detected [3063743.160045] usb 3-3: GobiSerial converter now attached to ttyUSB2 [3063743.163197] cdc\_ether 3-3:1.19 usb0: register ‘cdc\_ether’ at usb-0000:00:14.0-3, CDC Ethernet Device, 5e:71:b9:db:eb:eb * * * Do we have same setting on AT!USBCOMP? ati3 Manufacturer: Sierra Wireless, Incorporated Model: WP7607 Revision: SWI9X07Y\_02.28.03.03 000000 jenkins 2019/05/21 03:33:04 IMEI: 359779081234565 IMEI SV: 6 FSN: VN730485080103 +GCAP: +CGSM OK at!usbcomp? ERROR at!entercnd=“A710” OK at!usbcomp? Config Index: 1 Config Type: 1 (Generic) Interface bitmask: 0008000D (diag,nmea,modem,ecm) OK ---
**Author:** ![shatrughan](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@shatrughan](https://forum.sierrawireless.com/u/shatrughan)\ **Post date:** [June 3, 2020, 7:53am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/5 "2020-06-03T07:53:25Z")
Thanks. Your suspection is very right. When I configure usbcomp as yours, then I dont see double disconnect. However, in my project I have to use audio so I have enabled audio and thats where I start seeing double disconnect/reconnect. I am using CentOS7.7. Is there anything I can do to avoid double disconnect having audio enabled? at!usbcomp? Config Index: 1 Config Type: 1 (Generic) Interface bitmask: 0001010D (diag,nmea,modem,rmnet0,audio) at!reset Jun 3 07:56:13 localhost kernel: usb 1-1.1.1: USB disconnect, device number 30 Jun 3 07:56:13 localhost kernel: GobiSerial driver ttyUSB2: usb\_serial\_generic\_submit\_read\_urb - usb\_submit\_urb failed: -19 Jun 3 07:56:13 localhost kernel: GobiSerial driver ttyUSB0: GobiSerial converter now disconnected from ttyUSB0 Jun 3 07:56:13 localhost kernel: GobiSerial 1-1.1.1:1.0: device disconnected Jun 3 07:56:13 localhost kernel: GobiSerial driver ttyUSB1: GobiSerial converter now disconnected from ttyUSB1 Jun 3 07:56:13 localhost kernel: GobiSerial 1-1.1.1:1.2: device disconnected Jun 3 07:56:13 localhost kernel: GobiSerial driver ttyUSB2: GobiSerial converter now disconnected from ttyUSB2 Jun 3 07:56:13 localhost kernel: GobiSerial 1-1.1.1:1.3: device disconnected Jun 3 07:56:13 localhost kernel: GobiNet 1-1.1.1:1.8 enp0s29u1u1u1i8: unregister ‘GobiNet’ usb-0000:00:1d.0-1.1.1, GobiNet Ethernet Device Jun 3 07:56:13 localhost avahi-daemon[902]: Withdrawing workstation service for enp0s29u1u1u1i8. Jun 3 07:56:13 localhost journal: gvc\_mixer\_card\_get\_index: assertion ‘GVC\_IS\_MIXER\_CARD (card)’ failed Jun 3 07:56:13 localhost journal: gvc\_mixer\_card\_get\_index: assertion ‘GVC\_IS\_MIXER\_CARD (card)’ failed Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: new high-speed USB device number 31 using ehci-pci Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 8 but max is 3 Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: config 1 has no interface number 1 Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: New USB device found, idVendor=1199, idProduct=68c0, bcdDevice= 3.18 Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: Product: Sierra Wireless WP7607 Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: Manufacturer: Sierra Wireless, Incorporated Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: SerialNumber: V391067051081006 Jun 3 07:56:34 localhost kernel: GobiSerial 1-1.1.1:1.0: GobiSerial converter detected Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB0 Jun 3 07:56:34 localhost kernel: GobiSerial 1-1.1.1:1.2: GobiSerial converter detected Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB1 Jun 3 07:56:34 localhost kernel: GobiSerial 1-1.1.1:1.3: GobiSerial converter detected Jun 3 07:56:34 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB2 Jun 3 07:56:34 localhost kernel: QMAP Disabled Jun 3 07:56:34 localhost kernel: GobiNet 1-1.1.1:1.8 eth0: register ‘GobiNet’ at usb-0000:00:1d.0-1.1.1, GobiNet Ethernet Device, 16:66:5a:02:51:08 Jun 3 07:56:34 localhost kernel: USB Speed : USB 2.0 Jun 3 07:56:34 localhost mtp-probe: checking bus 1, device 31: “/sys/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.1/1-1.1.1” Jun 3 07:56:34 localhost mtp-probe: bus: 1, device: 31 was not an MTP device Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: USB disconnect, device number 31 Jun 3 07:56:50 localhost kernel: GobiSerial driver ttyUSB0: GobiSerial converter now disconnected from ttyUSB0 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.0: device disconnected Jun 3 07:56:50 localhost kernel: GobiSerial driver ttyUSB1: GobiSerial converter now disconnected from ttyUSB1 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.2: device disconnected Jun 3 07:56:50 localhost kernel: GobiSerial driver ttyUSB2: GobiSerial converter now disconnected from ttyUSB2 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.3: device disconnected Jun 3 07:56:50 localhost kernel: GobiNet 1-1.1.1:1.8 enp0s29u1u1u1i8: unregister ‘GobiNet’ usb-0000:00:1d.0-1.1.1, GobiNet Ethernet Device Jun 3 07:56:50 localhost avahi-daemon[902]: Withdrawing workstation service for enp0s29u1u1u1i8. Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: new high-speed USB device number 32 using ehci-pci Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 16 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 17 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 17 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 18 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 18 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has an invalid interface number: 8 but max is 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has no interface number 1 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has no interface number 4 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has no interface number 5 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: config 1 has no interface number 6 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: New USB device found, idVendor=1199, idProduct=68c0, bcdDevice= 3.18 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: Product: Sierra Wireless WP7607 Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: Manufacturer: Sierra Wireless, Incorporated Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: SerialNumber: V391067051081006 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.0: GobiSerial converter detected Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB0 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.2: GobiSerial converter detected Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB1 Jun 3 07:56:50 localhost kernel: GobiSerial 1-1.1.1:1.3: GobiSerial converter detected Jun 3 07:56:50 localhost kernel: usb 1-1.1.1: GobiSerial converter now attached to ttyUSB2 Jun 3 07:56:50 localhost kernel: QMAP Disabled Jun 3 07:56:50 localhost kernel: GobiNet 1-1.1.1:1.8 eth0: register ‘GobiNet’ at usb-0000:00:1d.0-1.1.1, GobiNet Ethernet Device, 16:66:5a:02:51:08 Jun 3 07:56:50 localhost kernel: USB Speed : USB 2.0 Jun 3 07:56:50 localhost mtp-probe: checking bus 1, device 32: “/sys/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.1/1-1.1.1” Jun 3 07:56:51 localhost mtp-probe: bus: 1, device: 32 was not an MTP device Jun 3 07:56:51 localhost rtkit-daemon[826]: Successfully made thread 3632 of process 1957 (/usr/bin/pulseaudio) owned by ‘42’ RT at priority 5. Jun 3 07:56:51 localhost rtkit-daemon[826]: Successfully made thread 3635 of process 1957 (/usr/bin/pulseaudio) owned by ‘42’ RT at priority 5. Jun 3 07:56:57 localhost kernel: creating qcqmi0 Jun 3 07:56:57 localhost kernel: RawIP mode ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [June 3, 2020, 8:22am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/6 "2020-06-03T08:22:41Z")
what is the actual impact to the system ?? ---
**Author:** ![shatrughan](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@shatrughan](https://forum.sierrawireless.com/u/shatrughan)\ **Post date:** [June 3, 2020, 8:27am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/7 "2020-06-03T08:27:39Z")
This cause extra delay on startup and sometimes unstability. Do you know what is causing 2nd disconnect when I enable audio? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [June 3, 2020, 8:50am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/8 "2020-06-03T08:50:07Z")
i don’t know, there is no clue in the debug log ---
**Author:** ![shatrughan](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@shatrughan](https://forum.sierrawireless.com/u/shatrughan)\ **Post date:** [June 3, 2020, 8:55am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/9 "2020-06-03T08:55:14Z")
Thats fine. I will handle this in my application. In case you get any clue/workaround, please share ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [June 3, 2020, 9:04am UTC](https://forum.sierrawireless.com/t/audio-enabled-wp7607-disconnects-reconnects-two-times-for-every-at-reset/20509/10 "2020-06-03T09:04:33Z")
here if i remove the USB cable, wait for the module boots up, after some time, plug in the USB cable, there will only be one time connection but not sure if you can cut the USB power from the host.