> with verbose mode I get > isa0 is at root > immediatly after the installing busra line
Hmm, so maybe it is hanging in isa_attach() ? http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/i86pc/io/isa.c#201 To verify this, boot with options " -kdvs" and in kmdb set a breakpoint in isa_attach, and start the kernel: ::bp isa`isa_attach ::cont This should stop in kmdb before isa_attach() runs. ::step out Now it should stop once more in kmdb, after isa_attach() has returned. Does it stop in kmdb after the "::step out" command, or does it hang? In case it hangs in isa_attach: the code tries to use ACPI to enumerate isa devices. Apparently you can use option "-B acpi-enum=off" to disable acpi for isa device enumeration. The acpi isa bus enumeration code also contains a debug switch to enable debug output, try to boot with "-B acpi_enum_debug=0xffff" to enable all debug output. -- This message posted from opensolaris.org