i get it too.
Occurs only when i am gaming.
Ryzen 3 2600
Vega 56
Don't think its related to this bug.
Sent my card back to supplier get it tested. See if it is dirty Vram
From: Joker Germany via Ubuntu MATE Community
Sent: Wednesday, 8 July 2020 12:53 PM
To: [email protected]
Reply To: Ubuntu MATE Community
Subject: [Ubuntu MATE Community] [Support & Help Requests/Hardware] 20.04 Display issues with AMD GPU
JokerGermany
8 July
i get it too.
Occurs only when i am gaming.
Ryzen 3 2600
Vega 56
Don't think its related to this bug.
It was a Faulty Radeon RX 570 Series, it would work semi ok on windows, but a disaster on Ubuntu Mate 20.04. The changed the unit. waiting now to see if its better when new unit arrives. Otherwise we are all going to be using the unmentionable OS.
Richard
Got replacement Radeon RX 570 Series first day no crash. You have really got to admire 20.04 in Mate it is awesome. Would like something better than Conky or something to show what is going on on the inside of my computer.
I downloaded the iso image from official site, I created a USB bootable with the standard tool on my Ubuntu Mate 18.04 desktop PC.
When I try to start the desktop PC with the bootable usb disk I can't do nothing because the image is what you can see in the attached image. The same usb works perfectly on my Acer laptop.
My desktop PC has a LG monitor 23" 16:9 connected via HDMI connector.
Graphic card is Radeon Vega integrated in Ryzen 3 3200 G processor.
monitor image mess
Wish I had seen this a couple of weeks ago, when my desktop running AMD Athlon 200GE Radeon Vega 3 graphics had the very same issue after upgrading the system to 20.04. Could have saved myself a repair bill. But I had earlier procrastinated on getting the shop to adjust the signal strength on the computer modem, so as the cliche goes, I killed two birds with one byte. (I like birds, by the way, they are cool.)
I tried to read all the messages in the bug you linked, I understand that the problem is a bug in AMD driver related to xfwm4, using glx the problem disappears. I also understand that they fixed the bug in a new AMD driver.
Some days ago, I tried a Live on ubuntu 20.04 with Gnome and that Live worked perfectly on my machine with AMD GPU (Mate Live doesn't work).
So, I assume that Gnome is still using glx, or they included the new AMD driver for Radeon graphic cards.
It would be possible to make the same in the Mate Live image, so we can install Mate 20.04 on our pcs?
We are waiting on a status update for the SRU on this fix from Wimpy.
Currently we hope that the fix will be included in 20.04.1 which is due the first week of August but there is no confirmation on that at this time. Sorry that I do not have better information to provide.
1 Like
20.04.1 would Most likely include plenty of urgent bug fixes. but i assume it would bring up-to date versions of all the MATE Programs such as Caja aswell Right?
That is not how point releases for an LTS work. Point releases will included updated packages for that release, in this case Focal. It will also include major bug fixes that are approved by the release team.
New MATE packages, using your example of Caja, are usually updated in the the next major release. In this case 20.10 (Groovy Gorilla) should see new MATE packages as part of the MATE Desktop 1.25.
1 Like
Ah, Okay Thank you. 
Hello Everyone,
I installed Xubuntu 20.04 on a Lenovo Ryzen 5, but have to do the next:
-
After booting with usb, open a terminal with Super+t (Windows Key + t) and assign a password (even one character) to xubuntu user, with this command: sudo passwd xubuntu
-
Press Control+Alt+F1, (it takes to a terminal), log as xubuntu and the password you set in the previous step
-
Type this command: xfconf-query -c xfwm4 -p /general/vblank_mode -t string -s "glx" --create
-
Kill the session with this command: killall xfce4-session
After this you will see the login screen, select xubuntu user and type the password you set in step 1, and install Mate.
When you log after install, you'll see the same issue, but repeat the process from step 2. with the user created after the installation.
Hope this helps.
This bug is documented here:
The workaround is explained here:
1 Like
I have 34" (21:9) display and it's very sad, that such a big bug can occur on a LTS version and affect users for month. I wont to use 2 windows, but without the composit it's a pain in the ass for me....
Sry, but i have to release my frustration about this bug, which was gathered in the past months...
Hi All
Still going strong with new card, no crash. Love the new system.
Perfection is possible, do you remember the Penguin on Cairo on the bottom of the screen.
I would love to see that doing a lap of honour on this Desktop!
Unfortunately, none of the regular QA or Dev Team members has an AMD GPU to test this.
What can be done to supply you guys with such hardware, since this shourtcoming has caused such a visible and annoying issue be let through?
I understand that this bug is very frustrating if it affects you; this particular bug occurs not only with Ubuntu MATE, but at a minimum also Xubuntu and Ubuntu Studio.
The Ubuntu MATE testing team is a small group which is dispersed around the world, who are very dedicated but are volunteers using their own hardware and their own personal time.
While I think it would be great to have team members equipped with systems with AMD GPUs to test, this issue does not occur with all AMD GPUs. For instance I have had a friend try and replicate the issue with an AMD RX 5700 XT without success.
There is almost an infinite number of hardware combinations, testing them all is not realistic or even possible. Different bugs may only occur when using a Macbook, certain nVidia cards, with different wifi devices.
This particular issue shows why we stress filing bug reports and marking existing ones as effecting you on Launchpad. The logs and associated information that is gathered in these reports is invaluable in helping the developers fix these. In turn the more reports that are filed generates more "heat" which helps in getting the needed resources in place to get these bugs fixed. Some of those resources are outside of the Ubuntu MATE team.
We have created threads for the past few releases to involve the community in testing. I urge everyone to join in and test, that is the best way for things to get found and to have the details needed to have fixes put into place.
1 Like
20.04.1 was released today. Unfortunately this bug was not resolved in this point release.
I did discuss this with members of the Ubuntu release team in irc prior to the point release. This week the Importance of this has been changed to High in Launchpad. That is a promising sign, that said I urge everyone affected by this to continue to update the bug report to continue to increase the 
on this issue.
As I said in the Menu icon thread: I can only speak for myself, but I do apologize that this continues to be an issue.
1 Like
If I understand well, do you need people with AMD GPU to test or reproduce this issue? If yes, I can ask help on an other Ubuntu forum?
The more people who can test and reproduce the issue and report on Launchpad the better.
I replaced my old nvidia by a radeon RX 5600 XT and I got this bug on Mate 20.04 on stock driver and also with radeon driver downloaded version 20.30. I will contribute to bug report.