Comment 8 for bug 194650

mrguitarmann - This report is tracking a bug in the rt61pci Ralink driver. Although your symptoms are the same as what is reported by others here, the cause is not the same (as you say you are using the zd1211rw driver). Please have a look at https://help.ubuntu.com/community/DebuggingSystemCrash and open a new bug report if necessary.