无法确定升级

do-release-upgrade （尝试从13.10升级到14.04）失败并显示以下消息：

 [...] Calculating the changes Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade. This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. Restoring original system state [...] 

我该怎么做才能解决它？ 是因为google-chrome ？ 如果是这样，我该如何解决？

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我运行了sudo apt-get remove xserver-xorg-video-all ，这似乎修复了它。