Solutions to Ubuntu freezes unexpectedly.

In this new entry we continue with the solution to common problems which you can find after you have installed Ubuntu. This time I come to share with you some of the solutions to the problem that Ubuntu freezes.

When Ubuntu freezes, the first step we usually resort to is to immediately restart the computer, although it could be the best solution, the problem lies when the system freezes frequently tends to occur, leading to the idea of ​​reinstalling the system or opting for change it.

Try to identify the problem

Both the novice and the average user usually see the problem and immediately look for a solution, which if it is found on the net is excellent, but when you do not find the information so easy.

It is because of that what can I recommend is that when the system crashes, reboot and try to reproduce the situation again, but now look for an application that registers the system events, for when it hangs, you were going to the log and identify the problem.

Now the most common thing is that the last application you ran was the cause of it, either due to a plugin, extension, overloading the system or it simply has an incompatibility with X.

Install the correct drivers

Another of the conflicts that usually freeze the system are the driversIf you are a user of an external video card, this may be the cause, because this topic is quite extensive.

What I can recommend is that if you are using open source drivers, switch to private which you can find on the official website of the manufacturer. Or in the opposite case you must choose to use the open source drivers.

Change Kernel

This option may be the most extensive because you can choose to compile the Kernel yourself to obtain better compatibility, even though this option is for advanced users, the truth is that there is a lot of information on the network with which you can test.

Now I recommend you look for and install a Kernel LTS version higher than the one you use, because it will have several months of support and it is always strongly recommended to do this.

Disable Hardware Acceleration

This other option may be due to the fact that when using a browser it is the one that is freezing your system, and when opening several tabs, some video etc. So we must deactivate it from the options of our browser.

Check X compatibility

This is a problem that I have personally encountered, as I mentioned before if you have a dedicated video card, you may have to install the private drivers, so it is necessary to verify compatibility with the Xorg.

In general, it produces a black screen, which freezes your system or simply nothing appears on the desktop, only the pure mouse pointer.

For this it is necessary to verify which version of the Xorg we have and which one is recommended for our card.

Because there is no 100% effective way to downgrade Due to the dependencies issue, you will need to look for an LTS version of the system with support for the Xorg version. what do you require.

What to do in case the system freezes

One of the most effective solutions that I have used is accessing aluna TTY and performing an xkill, this because only the X has been frozen, but if the system does not respond you can use this famous key combination which is Alt + SysRq ( print key) And where we will press the REISU B keys every 2 seconds.

Here the explanation of what this combination does.

• Alt + SysRq + R returns keyboard control.
• Alt + SysRq + E terminates (term) all processes (except init).
• Alt + SysRq + I kills all processes (except init).
• Alt + SysRq + S syncs the disks.
• Alt + SysRq + U remounts all filesystems in read mode.
• Alt + SysRq + B reboots the machine.