Graphics problems with AMD Athlon 3000G and MSI B450M

Question

I'm new to Ubuntu. I just bought a new PC for my son and we want to dual-boot Windows 10 and Ubuntu 20.04.

The PC has an Athlon 3000G with a MSI B450 and a m.2 SSD.

When I log in to Ubuntu, there is a problem with the desktop. I also can't seem to get amdgpu-pro from AMD's page, so I'm a bit lost.

It is almost impossible to navigate on the Ubuntu desktop due to the graphics issue.

I have also tried change the screen resolution with xrandr -s 800x600 but this did not solve the problem, and might have made it worse: The native resolution for the screen is 1440x900.

is there a dedicated GPU (graphics card) or is the only display adapter your Athlon 3000G? — Nmath, May 21 '20 at 01:44
Did you check for the latest firmware updates for your B450? Even new usually needs updating. — ubfan1, May 24 '20 at 18:23

score 1 · Accepted Answer · edited Oct 07 '20 at 05:00

1

My previous answer prevents the amdgpu driver to load .
On my Lenovo Ideapad L340-17API , it freeze desktop after a few minutes.
Correct answer is from Failed to put a second screen Xubuntu 20.04 and ArchWiki: Ryzen

Edit again grub.conf to remove previously added "nomodeset" parameter, then run sudo update-grub
Edit /usr/share/X11/xorg.conf.d/xx-amdgpu.conf
Add the line Option "TearFree" "true" just before the last line:

Section "Device"  
     Identifier "AMD"    
     Driver "amdgpu"  
     Option "TearFree"  "true"  
EndSection

Save and reboot.

edited Oct 07 '20 at 05:00

Lorenz Keel

8,905

answered May 26 '20 at 20:29

laugeo

2,827

Thanks again, lauego you had been very helpful, it really was a matter about amdgu already installed. It's nice that people on Ubnuntu care about others. "TearFree" really solved the problem so I can now get the 1440x900 native resolution on that pc. Thank you – Adri May 29 '20 at 08:56

score 0 · Answer 2 · answered May 24 '20 at 18:17

I recently had the same problem with Xubuntu 20.04 on a Lenovo Ideapad L340-17API, which have AMD gpu.

You need to set "nomodeset" parameter at boot , as described here:
Edit /etc/default/grub :
sudo nano /etc/default/grub

Add "nomodeset" to line GRUB_CMDLINE_LINUX_DEFAULT . This line becomes :
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
Save by hitting Ctrl+O, then exit nano with Ctrl+X, then run:
sudo update-grub
Reboot

(Not related, but the desktop had random freeze , so i had to revert to Xubuntu 18.04 . The amdgpu driver is installed but not loaded in 20.04, I guess its the problem )

Hello. Thank you very much, that really worked for my problem. Now I can log in on Ubuntu and work on it. Actually resolution it's only 1024x768 and don't display other modes, but there is a big data to search on these. Ubuntu It's a really a great comunity. Kudos — Adri, May 25 '20 at 20:00

Graphics problems with AMD Athlon 3000G and MSI B450M

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