I just tried a 2nd upgrade F8-> rawhide.
On reboot, it hung a long time on bringing up eth0, and failed. This never had a problem on F8.
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
When it went to start X, all I got was an 'X'. And an apparantly dead machine.
I rebooted into mode 3. Ran top. Nothing showed a significant load average. Quit top. Now, no response from keyboard.
Rebooted into mode 1. Looked at /var/log/messages. Millions(?) of lines from named. chkconfig named off. Rebooted again. Now, running OK, but still no eth0.
No wired shown in NM. Don't know why.