The VMWare software installed on my Fedora 15 machine suddenly doesn't work, which, I think, may be bacause of a kernel update via yum.
So I tried to boot from 2 previous kernel versions in the choosing-kernel-version screen before booting, but they just halted on the start-up screen with a message of "started something" (or maybe it just would take too long for me to tolerate).
I also tried to install VirtualBox, but only found that it needs
kernel-uname-r = 18.104.22.168-35.fc15.i686 instead of my installed
Why would the 2 previous kernel versions fail to boot? Is there any way to roll back my kernel update, or any other ways just to get VMWare back to work?