When installing Docker on the ubuntu14.04, I didn't see it because of the blurred vision:
The sudo apt-get upgrade command was executed directly. And then there was a tragedy!
The following error occurred after rebooting!
And after clicking OK to enter the next step, you can no longer select other configuration options ... I was so mad at the time ...
The following information was found because my video card is incompatible with the kernel after upgrade. The answer on the network is: Upgrade the graphics driver. I knocked over the command, and then the egg!
Now there is only one route to choose from, which is to restore the system. Fortunately, I chose to keep the old kernel version when I upgraded.
In the above interface at the same time press CTRL+ALT+F1, enter the account password, access to the System Restore link, but can not execute, because this restore is also through the interface operation.
Later I thought of the command to view the kernel version when I installed Docker: uname-a, the result is that I have two kernel versions: the higher version, the natural one is the upgrade.
This is good, can I uninstall the high version? This will also achieve the effect of kernel version demotion.
Execute the following command in turn:
Dpkg--get-selections | grep linux-image
sudo apt-get remove high version kernel name
Uname-a
Update-grub
After the reboot finally saw the familiar interface!
Experienced this "accident", experience several points:
1.sudo Apt-get Upgrade not update the application, but update the entire kernel, it must be used with caution!
2. Backup is a good habit.
3. The most critical step in encountering an "accident" is figuring out why. Reasons come out, even if there is no ready-made online method, you can determine the solution based on the cause of the idea.
ubuntu14.04 upgrade a solution to the problem of "Ubuntu is running in low-graphics mode"