Unhandled Lockdown error (-15)

I have an iPhone 4 running the latest beta of iOS5, and running "ideviceinfo -d" results in nothing.

Hi - I am getting this error as well, and it just started after the latest upgrade to my iPad, a Model MC916LL, running 5.0 (9A334); libimobiledevice programs are at 1.1.1-1ibintu1 (all installed items in attached image); and my system is running a fresh load of Ubuntu 11.10 64-bit (my lshw output is attached).

$ ideviceinfo -d ActivationPublicKey: LS0tLS1CRUdJTiBSU0EgUFVCTElDIEtFWS0tLS0tCk1JR0pBb0dCQU01ZjN6YnY3NXlUSW5zbnR1NkZoUGtBNytBQmxGNGIzQkUxelBTRnd4YUdnVnRmWENuWUlDYjEKdFVxZ1pQM3l4MVYwSmdOV1krdmg0SmxSRm1iM0VhakN2alNpZktCNjVsdFBRV1RrZE5vT1JPRUFWQ3M2Qnp2ZQpWQXo4SFRyNU1aOXI3NEx3eEUwSE9yb3FsK0RSTFdqZ1RCOUJQaktwakttdGpYT3AwK0Q1QWdNQkFBRT0KLS0tLS1FTkQgUlNBIFBVQkxJQyBLRVktLS0tLQo=
BuildVersion: 9A334
DeviceClass: iPad
DeviceName: Rusty
DevicePublicKey: LS0tLS1CRUdJTiBSU0EgUFVCTElDIEtFWS0tLS0tCk1JR0pBb0dCQUsydEJYTUNQRW1COHF2WGpjWkdibTZTc0ZjbFhjNE1MV29ieXlKS2N2dGNRelpMZzQ5d3YzODgKTlpOUHRUWnZlL2RGWWRFTlR5K2pFd0dnbk9kN2NVamNCbjBCaWdZL09nU3Y4UTlKRGZsNTNwSGpTdVNDdmY1VAp2bzk3RjVPWXp1WVVJcmw2aXgycFVTVkVsSC91KytCSTdLZ1BXdno1SlZ4UW9tU2JVVXJ6QWdNQkFBRT0KLS0tLS1FTkQgUlNBIFBVQkxJQyBLRVktLS0tLQo=
DieID: 3833766383982775496
HardwareModel: K93AP
PartitionType:
ProductVersion: 5.0
ProductionSOC: true
ProtocolVersion: 2
TelephonyCapability: false
UniqueChipID: 75581984206
UniqueDeviceID: 3c2e1506a192f376daee9509cf2c081e9ae16312
WiFiAddress: a4:d1:d2:4e:fd:32

Is there anything else that would help?

home@ubuntu:~$ ideviceinfo -d
ActivationPublicKey: LS0tLS1CRUdJTiBSU0EgUFVCTElDIEtFWS0tLS0tCk1JR0pBb0dCQUtoZ25ERkE1VlZYUjFyUkcrbEVFdjIwNjRuUXFlVW83WGZHRWVrcThLdnBDeUdUVGFNWjB5Y24KancwcnFod1pXM2llRmd6TnJIV2cveDROTmR4b3lieUVYWExNcEgzMHdRWmFyYy9ZVlhxNG9MMTZSWTJ1enc5ZQplekoyMXVqQ0hjK3ZEV1FwcmVtcDAzaXZlaDJnL3JYcHRydy8zK1ZSVzYvSTlxRnhyWFhuQWdNQkFBRT0KLS0tLS1FTkQgUlNBIFBVQkxJQyBLRVktLS0tLQo=
BasebandSerialNumber: aeoJm5AUGYJKbPIO
BuildVersion: 9A334
DeviceClass: iPhone
DeviceName: monico.dolor’s iPhone
DevicePublicKey: LS0tLS1CRUdJTiBSU0EgUFVCTElDIEtFWS0tLS0tCk1JR0pBb0dCQVBIR2tqTkJHYzYzRWtiZXYzWmY4NUVOTGoxS2xNMW4vNk12aS91aUo3a0p2L054eE1CYW1ndnUKTkF3L1JQNXdIY1dYTjlLUm50ckhldmttbDdYLzFHTXlaRW9WcVp0MmZyd0NHL0E0NGh3SlFOTCs3TTJtcTNuagpESmx2V3JtaUlxY2g0OUI3VXNGUFk1Z29zVW5UWFc0cTRTc1g2ekhEZkFOeDlRb1VQQ2J4QWdNQkFBRT0KLS0tLS1FTkQgUlNBIFBVQkxJQyBLRVktLS0tLQo=
DieID: 5332333663500493448
HardwareModel: N90AP
PartitionType:
ProductVersion: 5.0
ProductionSOC: true
ProtocolVersion: 2
TelephonyCapability: true
UniqueChipID: 1908324846863
UniqueDeviceID: 61fc559bba1d1fce6433733a7571a8e2a1b47aaa
WiFiAddress: 58:1f:aa:d2:d5:0c

Here is mine, I am also keen in finding out as to when can this be resolved. I am really not sure what happened, for a time my IOS5 and UBUNTU 11.10 worked fine those unhandled lockdown error (-4) and (-15) disappeared and I can even see my Iphones battery status in the battery/power status bar. But what happened to me was that my phone was restored from backup as my kid accidentally erased my iphone. But after the restore using my other computer, I am now seeing this lockdown (-15) always. BTW what does this lockdown exactly mean (for us newbie here)..

same here but i followed advice in ticket #181 Can't mount iPhone in iOS 4.2.1 restored afaik usb funktion
loads of info dumped on #181 Can't mount iPhone in iOS 4.2.1 i can copy and paste.. still info is in #181 Can't mount iPhone in iOS 4.2.1

GL!