16.04 預裝的是 4.4
請確定您沒有使用 LTS enablement stack 提供的核心
$ apt search '^linux-generic-.*'
正在排序... 完成
全文搜索... 完成
linux-generic-hwe-16.04/xenial-updates,xenial-security 4.8.0.39.10 amd64
Complete Generic Linux kernel and headers
linux-generic-hwe-16.04-edge/xenial-updates,xenial-security 4.8.0.34.6 amd64
Complete Generic Linux kernel and headers
linux-generic-lts-utopic/xenial-updates,xenial-security 4.4.0.64.68 amd64
Complete Generic Linux kernel and headers (dummy transitional package)
linux-generic-lts-vivid/xenial-updates,xenial-security 4.4.0.64.68 amd64
Complete Generic Linux kernel and headers (dummy transitional package)
linux-generic-lts-wily/xenial-updates,xenial-security 4.4.0.64.68 amd64
Complete Generic Linux kernel and headers (dummy transitional package)
linux-generic-lts-xenial/xenial-updates,xenial-security,now 4.4.0.64.68 amd64 [已安装]
Complete Generic Linux kernel and headers (dummy transitional package)