问题
I have installed the Ubuntu in virtualbox for months. After I upgrade the Linux kernal, I cannot boot Ubuntu with normal mode. But it can success boot in recovery mode I occurred some error:
floppy0: no floppy controllers found. => this will let me wait a few minutes, and it will go through.
intel_rapl: no valid rapl domains found in package 0 =>the boot process stuck at this error
I don't know whether it's a problem whit kernal 4.72 or not.
Linux kernal: 4.72 lowlatency amd64 virtualbox version: 5.14 physic cpu: x86_64
回答1:
I solved the problem by myself.
Below is my method:
1.Enter recovery mode.
2.Install generic version kernel
3.Purge all of the lowlatency kernels
But I still don't know why virtualbox can't run with lowlatency version kernel.
And the error (or normal boot process),"intel_rapl: no vaild rapl domains found in package 0", is still showed when boot, but it dosen't let the boot process stop.
来源：https://stackoverflow.com/questions/39121129/error-no-valid-rapl-domains-found-in-package-0-when-boot-ubuntu-16-04-installe