matusita> I must provide more detailed information, but here's quick report.
Using trace command, this panic is caused by:
usbd_open_pipe_ival(c40416e0, 1, c8148858, ) at
usbd_open_pipe_ival+0x1d
usbd_open_pipe(c40416e0, 81, 1, c8148858, c40769c0, c8148880, 2, 1, c81488
Following are observed with 5-current kernel as of Apr/25/2002.
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x6
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01898d1
stack pointer = 0x10:0xc9476b24
frame pointe