This is a new issue, laptop boots just fine with 12.04 LTS. This could be also something in the network-manager or modem-manager, as in the 12.04 LTS the broadband does not work as it uses the usb ethernet and the modem requires some AT commands to be sent in order to initialize it. In the Quantal some initialization seems to be done automatically as after boot network-manager is able to detect it and to connect too, and the kernel panic comes with just after loading all the modem related stuff when the hw switch is turned off during the boot.
I will test the new kernel asap. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1042054 Title: ThinkPad X220 does not boot 12.10 without hardware wireless kill switch being enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1042054/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
