昨晚我更新了我的 ubuntu 安装，今天 GUI 无法启动。
当我启动时，GUI 启动，屏幕在 CLI 登录和黑屏之间闪烁（我猜是反复尝试加载 GUI）。
在 upstart 模式下启动时，我可以访问 CLI。
手动执行 startx 命令后，屏幕变黑以加载 GUI，但失败了。
每次执行此操作后，Dmesg 都会立即显示以下输出：
[68.616504] gnome-shell[2337]: segfault at 14 ip 00007f3ac9c51035 sp 00007ffee2163bb0 error 4 in libmutter.so.0.0.0[7f3ac9c17000+f2000]
[69.596696] gnome-shell[2337]: segfault at 14 ip 00007fd2d494e035 sp 00007fff2fe63ce0 error 4 in libmutter.so.0.0.0[7fd2d4914000+f2000]
我之前没有遇到过这样的问题，所以我不知道如何解决这个问题，除了每 5 分钟检查一次更新，希望损坏的软件能够得到修复。
更新：
我找到了可能包含问题的更新日志，但我不知道它是否有用。
Start-Date: 2017-05-16 21:58:43
Commandline: aptdaemon role='role-commit-packages' sender=':1.118'
Install: linux-signed-image-4.4.0-78-generic:amd64 (4.4.0-78.99, automatic), linux-tools-4.4.0-78:amd64 (4.4.0-78.99, automatic), linux-image-4.4.0-78-generic:amd64 (4.4.0-78.99, automatic), linux-headers-4.8.0-52:amd64 (4.8.0-52.55~16.04.1, automatic), linux-image-4.8.0-52-generic:amd64 (4.8.0-52.55~16.04.1, automatic), linux-image-extra-4.8.0-52-generic:amd64 (4.8.0-52.55~16.04.1, automatic), linux-image-extra-4.4.0-78-generic:amd64 (4.4.0-78.99, automatic), linux-headers-4.4.0-78-generic:amd64 (4.4.0-78.99, automatic), linux-headers-4.4.0-78:amd64 (4.4.0-78.99, automatic), linux-headers-4.8.0-52-generic:amd64 (4.8.0-52.55~16.04.1, automatic), linux-tools-4.4.0-78-generic:amd64 (4.4.0-78.99, automatic)
Upgrade: linux-headers-generic:amd64 (4.4.0.77.83, 4.4.0.78.84), linux-libc-dev:amd64 (4.4.0-77.98, 4.4.0-78.99), qemu-system-mips:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-system-misc:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-system-ppc:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), linux-image-generic-hwe-16.04:amd64 (4.8.0.51.22, 4.8.0.52.23), linux-image-generic:amd64 (4.4.0.77.83, 4.4.0.78.84), libgs9:amd64 (9.18~dfsg~0-0ubuntu2.4, 9.18~dfsg~0-0ubuntu2.6), snapd:amd64 (2.24.1, 2.25), linux-signed-image-generic:amd64 (4.4.0.77.83, 4.4.0.78.84), linux-generic-hwe-16.04:amd64 (4.8.0.51.22, 4.8.0.52.23), qemu-system-x86:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-user:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), gdm3:amd64 (3.18.3-0ubuntu2, 3.18.3-0ubuntu2.1), linux-signed-generic:amd64 (4.4.0.77.83, 4.4.0.78.84), gir1.2-gdm-1.0:amd64 (3.18.3-0ubuntu2, 3.18.3-0ubuntu2.1), libgdm1:amd64 (3.18.3-0ubuntu2, 3.18.3-0ubuntu2.1), qemu:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-utils:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-system-sparc:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), ghostscript:amd64 (9.18~dfsg~0-0ubuntu2.4, 9.18~dfsg~0-0ubuntu2.6), ghostscript-x:amd64 (9.18~dfsg~0-0ubuntu2.4, 9.18~dfsg~0-0ubuntu2.6), qemu-user-binfmt:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), libgs9-common:amd64 (9.18~dfsg~0-0ubuntu2.4, 9.18~dfsg~0-0ubuntu2.6), linux-headers-generic-hwe-16.04:amd64 (4.8.0.51.22, 4.8.0.52.23), qemu-system-arm:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), linux-tools-common:amd64 (4.4.0-77.98, 4.4.0-78.99), linux-tools-virtual:amd64 (4.4.0.77.83, 4.4.0.78.84), qemu-block-extra:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), linux-generic:amd64 (4.4.0.77.83, 4.4.0.78.84), qemu-system-common:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14), qemu-system:amd64 (1:2.5+dfsg-5ubuntu10.11, 1:2.5+dfsg-5ubuntu10.14)
End-Date: 2017-05-16 22:16:29
答案1
事实证明，新版本的 gdm3 及其相关软件包解决了该问题。这
是我第一次通过稍后再次尝试相同的操作（检查更新）来解决问题 :)