Hello List, I just recently upgraded my machine a few days ago to 6.1-RC2 and have noticed a problem when using pciconf to read the configuration space register of one of my network interfaces. Attempting to read the configuration space when the network is online produces the output I would expect to see. When I bring the interface down using ifconfig and run pciconf -r pci10:9:0 0x0:0xff the system becomes completely unresponsive. I first noticed this issue last night when I had no network connectivity. This isn't a major problem to me as I can always read the registers when I'm online, but I am wondering if there is a way to possibly debug this to find out what is causing the system to freeze up. The network card is an onboard Broadcom BCM5704. Thanks Gardner