# Development Tools **URL:** \ **Category:** Development tools\ **Created:** [August 20, 2013, 12:15pm UTC](https://forum.sierrawireless.com/t/development-tools/6686 "2013-08-20T12:15:33Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![lotam](https://avatars.discourse-cdn.com/v4/letter/l/958977/32.png) [@lotam](https://forum.sierrawireless.com/u/lotam)\ **Post date:** [August 27, 2013, 4:46am UTC](https://forum.sierrawireless.com/t/development-tools/6686/4 "2013-08-27T04:46:54Z")
Sorry that I missed your update. I think it maybe a compatibility issue between the driver and kernel 3.10. Is it mandatory for you to use Direct IP? If not, one quick workaround is to change the USB configuration to “3” or “5”. ```auto AT!UDUSBCOMP=? 0 - HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED 1 - HIP DM NMEA AT MDM1 MS NOT SUPPORTED 2 - HIP DM NMEA AT NIC1 SUPPORTED 3 - HIP DM NMEA AT MDM1 NIC1 SUPPORTED 4 - HIP DM NMEA AT NIC1 NIC2 NIC3 SUPPORTED 5 - HIP DM NMEA AT ECM1 SUPPORTED OK AT!UDUSBCOMP=3 OK AT!RESET OK ``` In this case, 5 virtual ports will be enumerated (e.g. ttyUSB0 to ttyUSB4), in which ttyUSB3 is the AT port and ttyUSB4 is the PPP port. I will check using kernel 3.10 within this week. Thx. --- _[View the full topic](https://forum.sierrawireless.com/t/development-tools/6686)._