在启动VirtualBox里的虚拟机的时候,弹出个如下报错:

No audio device could be opened.Select the NULL audio backend with the consequence that no sound is audible.
Error ID: HostAudioNotResponding
Severity: Warning



启动之后就是虚拟机里没有声音,原来是 media-libs/libsdl 造成的,解决办法就是在/etc/portage/package.mask里把高于1.2.14屏蔽掉,然后重新emerge