Dave, thank you for the suggestion. But where I live now I’m quite alone, and I have no money at the moment to change anything. I need to wait and to make it fit. With the standard Ubuntu, that is heavier, that’s strange but I had no graphic issues… Only with UM, and I don’t understand why…
Tiox I would like to help, but as you can see I try to fix some issues as well… frustrating when it doesn’t work 
Hallo Suzy
Ubuntu-Mate is a joy to use, I am fortunate in that the two machines I run it on were both built to run Linux.
Now I don't know exactly what you know or have done so far, but if you haven't carried out the following steps (make things better steps) then I suggest you give them a try - in the sequence described.
.
Thank you so much alpinejohn ! 
I would like to try again UM. I really love this system.
However, I thought about something. If I’m right, it needs 5 GB RAM to run well. I have 4.
So I think it’s a part of the problem. Cause Ubuntu standard and Ubuntu Mate were a bit slow on my computer. Espacially Mate (dunno why really…) Maybe I got a corrupt iso, but I don’t think so, I got the iso on the website of Mate itself.
Anyway, cause of the RAM, I try Linux Peppermint for a few days. It works better and faster. I miss many things I had on Ubuntu and that I don’t have anymore, even if Peppermint is a very great distro. The very only problem I still have is the lines in my screen, that I’ll try to solve again… it’s neverending ! Well, I want to get back to Ubuntu as soon as possible…
Suzy, 4 GB of RAM is more than enough to run Ubuntu MATE. The lines in your screen could be “screen tearing”. Do you happen to know what video card or graphics adapter is in your computer? This could be part of the reason you were having issues on UM but it can usually be either mitigated or eliminated completely by using the correct driver and compositor combination.
Hallo Suzy
I would suggest you go with what works for you on the computer you have now.
When you get around one day to buying your next computer be careful and choose something that was built “Linux-friendly”, i.e. with “standard” hardware that has drivers already in the Linux kernel.
If you’ll be looking to buy a second hand computer Lenovo Think Pads have a good track record of Linux compatibility. Do your research before you spend your money.
I have an old HP netbook with 2GB RAM - Ubuntu-mate runs well on it. The weakness of that machine is the Intel Atom cpu.
On my main machine I get screen-tearing when I try to run the browser “Opera”. So I don’t use Opera.
There’s a lot of hardware out there that was built to run windoze, the less expensive models can have some really exotic components under the hood, and for lack of drivers Linux just won’t run well on those devices.
If you use the package “radiotray” try these:
(i)
http://67.212.85.90/choi.mp3.m3u
(ii)
[http://stream02.ustream.ca:8000/ckrl128.mp3]
I had to enclose the URL in square brackets to stop it playing here.
I’m guessing that you know them already.
ATI Radeon X1950 according to post here.
And yes, UM runs well with 2 gigs of RAM and on older hardware.
This could very well be a significant source of the issues. The X1950 is a fairly old card at this point and with AMD’s proprietary graphics drivers being depricated, support will be limited at best. Afraid I can’t offer any more help other than recommending a video card upgrade at some point.
Hi Suzy,
First thing I do after a new install (assuming you get that far) is check ‘dmesg’ terminal output. You usually find your problems in there.
Then I install all updates, then install drivers, checking ‘dmesg’ along the way. nine times out of ten most errors will be fixed with updates & driver installs but sometimes it could be a bios setting that doesn’t play nice with linux.
So whatever you install check the dmesg output at least you can search for a solution if you get any errors in dmesg.
Good Luck
VtvBreech, Really ?? that’s good news !!! 
So I can give it another try without asking too much from my computer.
My graphic card is ATI Raedon X1950 pro. It’s supposed to be fully supported by Ubuntu, so I wonder…
Why my computer freezes is another question I wonder about Mate for me… Maybe I should try to download another iso…
It gives me hope… sure in the week end I’ll try to install it again…
Thank you alpinejohn, that’s very useful. I will search well and I’ll be careful.
Thanks antechdesings, I’ll learn how to use it 
Omg I realized I potsed many answers instead of everything in one reply, I’m sorry lol I just got up and I’m a bit confused XD I go to work and during the week end, I’ll try all what you proposed me. I’ll give you some feedback after of course ! Have a nice day everyone !
No need to. I checked out 16.04.2 and xrandr works without hitches when I installed it on the computer I was intending to use. xrandr works as did in 17.04 OOTB and I’ll be hanging with it until 2018, for sure.
After establishing the part I keep my stuff on as one which should mount at startup and with the correct label, and installing all of my previous software, adding PPAs as necessary so on everything worked without a hitch.
VtvBreech, about the videocard, I noticed I didn’t have this problem with the standard Ubuntu, only with Mate, that’s weird for me…
I have very less issues with Peppermint, even if sometimes I get these lines in my screen, it’s very less compared with Mate.
According to what you tell me, maybe I’m better to wait for a new computer, so the hardware will be up to date. And I’ll be careful to get something Linux-friendly So I’ll be allowed to install UM without any issue
There is no such thing as Linux-friendly.
I say this considering that everything done for Linux was made in one of two scenarios;
Most things for the consumer space falls under #1, while most things for the enterprise space might fall under #2. Certainly my machines were not “Certified” Linux-friendly but they work, yeah?
Ah yeah I hear you
I heard it’s possible to get a Linux friendly hardware, like Dell, for example…
Another example, my graphic card fits well with Linux (ATI), mine is just too old…
I think if I go with something like Dell, chances are higher to be ok. What do you think about it ?
At the moment, I’m a bit sad to give up on Ubuntu for a while though…
Yes now I remember when I “heard” that ! Clearly I will chose a Dell or a HP the next time, I’ll make sure about the model before, of course.
I run Peppermint since 2 days now, it seems to fit well. It’s a beautiful distro, but I miss Ubuntu really much.
I will make some other tries today, to compare how it runs… I’ll try again UM, but I’ll download another iso
If the system you have works nice now, figure out some way to emulate what you want from Ubuntu MATE. You won’t have the welcome application like you might desire but that thing is for first-timers anyway. You seem a little more experienced and not need it so readily.
Else, you could figure out what Peppermint does right and try to find suitable software that works as drop-in replacements for what’s missing Ubuntu MATE but if it works, don’t mess around with it and try something else contributing to the detriment of your experience.
I’ve just tried Peppermint in a VM. It’s actually quite a nice distro. Very odd experience, though as it is not actually a singular desktop environment but, is, in fact, a hodge-podge of different DE elements. So, for example, the windows manager is, I think, Openbox and the underlying desktop environment is LXDE. But, the desktop panels and main menu are XFCE and it uses a variety of desktop tools pulled from Mint and Ubuntu.
It’s weird but it works.
@tiox Yes clever ! I tried to make a bit Peppermint “UM like”, and all of this work made me think about what I really would like…
Oh don’t worry, all these experiences are a learning lesson to me I still have so many things to learn, but in the last 3 weeks I can tell I’m a bit more experienced and I still love Linux, in all its distros
@stevecook172001 : Yeah isn’t it ? lol It’s very weird, but for old weak computers this little thing works perfectly I wanted to try Antix and Slitaz (well, I’m curious and I was into an exploration trip), but I’m not experienced enough to install it correctly. I ended with a log in, a password and a bunch of things I didn’t know how to do, and finished on the floor of my livingroom crying with despair 
(hey that’s a caricature, guys LOL) So I gave up for now about these distros…
I gave 2 or 3 days for each distros I tried. Peppermint is awesome, but what I really wanted were a few small things, like the Ubuntu launcher, the software center… I missed these things with Peppermint. The searching bar gives “restricted” results compared to the Ubuntu launcher. Then I decided to give another try to the standard Ubuntu, knowing I had less problems with it than with Mate… omg, yes I know, so many tries and exploration…
