MC7455 not listed as usb device anymore after reboot

[Thomas Lang]

Hi all,
perhaps you have seen this bug before. I’m using the MC7455 with a linux system after normal power cycle (unplugged power) the mc 7455 can be found with lsusb:

go at ubuntu:~$ lsusb
Bus 003 Device 003: ID 1199:9071 Sierra Wireless, Inc.
Bus 003 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

If I do a reboot, the mc7455 is not listed anymore.

Any ideas what might be the problem?

Kind regards,
Thomas