在Fedora下安装了Virtualbox，发现运行时出现以下问题：
Kernel driver not installed (rc=-1908)
The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing
‘/etc/init.d/vboxdrv setup’
as root. Users of Ubuntu, Fedora or Mandriva should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.
根据提示运行以root身份运行
/etc/init.d/vboxdrv setup
Stopping VirtualBox kernel modules [确定]
Uninstalling old VirtualBox DKMS kernel modules [确定]
Trying to register the VirtualBox kernel modules using DKMSError! Bad return status for module build on kernel: 2.6.38.6-27.fc15.i686 (i686)
Consult /var/lib/dkms/vboxhost/4.0.8/build/make.log for more information.
[失败]
(Failed, trying without DKMS)
Recompiling VirtualBox kernel modules [失败]
(Look at /var/log/vbox-install.log to find out what went wrong)
解决方法：
1、可以先尝试：
$su yum install -y kernel-headers kernel-devel dkms gcc $su yum -y update
接着运行
/etc/init.d/vboxdrv setup
如果执行此操作，仍然出现上述错误。可以参考第二步执行
2、先 安装 PAE 包
$ yum install kernel-PAE-devel
完成后再执行 $ /etc/init.d/vboxdrv setup ，则显示：
Stopping VirtualBox kernel modules [确定]
Uninstalling old VirtualBox DKMS kernel modules [确定]
Trying to register the VirtualBox kernel modules using DKMS[确定]
Starting VirtualBox kernel modules [确定]
运行成功后，虚拟机可以运行成功！
温馨提醒：$或$su相关的命令，需要Root权限，因此需要先运行su root，然后再输入密码，即可。