Hello guys,
I am new in Linux, but I had a strong will to try it and...here I am!
For my old notebook, I chosed Lubuntu 17.10 and...it runs like a F1 car!
But recently, after logging in, a error appears on my screen.
Resumed, it something like:

ubuntu kerneloops bug:unable to handle kernel null pointer dereference at 00000004
IP: bio_uncopy_user+0xc3/0x140
BUG: unable to handle kernell NULL pointer dereference at location EIP:bio_uncopy_user+0xc3/0x140 SS:ESP: 0068:f4381d04
Oops: 0000 [#1] SMP

Is this only a bug easy to fix or is it something worst?
Thanks for any help you could give and...I am sorry for my English...I am Portuguese and a French student guy...
Thanks everyone!

Define old in terms of when the computer was manufactured, some info on your hard ware. What a 12 years thinks of as old is not the same as what some 50+ considers old.

Did your Lubuntu install work for some time before this problem? If so, what changes if any were made to hardware/software?

This is not a solution to your problem but if your hardware can support it you might try Lubuntu 18.04, support for 17.10 ends in 2 months.

Hello SirJams,

Welcome!

You can read the entire kernel oops message in /var/log/messages. If your so inclined you can report it as a bug. If it isn't causing a problem, you don't have to worry about it.

Hello. Tx fir your help.
This machine is 10 years old, with a 1.0 ghz processor and 4 gb ram.
I updated some programs , and installed wine, thunderbird and one or two similar programs...
By the way, can I update my lubuntu directly from my lubuntu 17 or must I repeat the entire process of installing it?
Thank you again

Thank you, AwesomeMachine,
This issue doesn t crush the system or anything else, so, I think that I am going to ignore it, just as you said. As a noobie, I just wanted to discover if it was something bad...
Thanks for your help

You can directly upgrade Lubuntu 17.10 to 18.04 but I would definitely recommend you backup all your data in case you have a problem. It's also always a good idea to have your system with the installer on a DVD/flash drive that you can boot. If you don't have a lot of personal data on the machine, it might be easier to do a new install as it usually doesn't take nearly as long and you are not dependent upon an internet connection as you are for the upgrade.

Thank you yancek,

But, tell me (another newbie question), what is the most simple way to upgrade directly to 18.04 and backup my data? Save it in a flash drive and after the upgrade copy it to my machine?

The stuff you want to back up is in the /home directory. If you have only one user account, then you want to back up /home/username, where "username" is the name used to log in.

The simplest thing to do is plug in an external USB drive or flash drive and copy the entire home directory to it. The home directory has visible directories, like "Downloads", "Pictures", etc. It also contains hidden files and directories with names starting with "." like ".mozilla", ".config", ".profile", etc. The hidden files and directories contain things like your web browser bookmarks, desktop theme settings, history of commands that you have entered in the terminal, etc.

If you back up the entire home directory (make sure to include the hidden files and directories inside), then when you copy all that stuff from the backup to your upgraded installation, it should be just like you had it set up before, with all the settings you made in the old system kept for the new system.

Another option for the future is to create separate disk partitions for /home and / (the root filesystem). That way, you can install an upgraded version of the operating system on the "/" partition without overwriting /home. You just tell the installer which partition is to be /home, and do not format it. After installation, all your old settings will already be there.

I would also advise backing up the /etc directory. This is where you keep your system configuration files, some of which you may have edited in the past.

Thank you. That was very usefull.

Thank you.