Upgrade from Ubuntu 18.04 to 20.04 caused scrambled screen

I upgraded from Ubuntu 18.04.5 to Ubuntu 20.04. Upon new re-boot screen is unusable as it is scrambled. See attachment.

I don't have a clue as to how to fix this. I can't use the machine to fix itself as I can't access the control center.

I think there is a 'ctrl xx' to get out of the x-window and access the terminal but then what?

Do I need a different driver to fix this?

Quote:

Thu 08 Oct 2020 03:28:39 PM PDT System: Host: rick-MS-7C02 Kernel: 5.4.0-48-generic x86_64 bits: 64 gcc: 7.5.0 Desktop: MATE 1.20.1 (Gtk 3.22.30-1ubuntu4) info: mate-panel dm: lightdm Distro: Ubuntu 18.04.5 LTS ------------------------------------------ Machine: Device: desktop System: Micro-Star product: MS-7C02 v: 1.0 serial: N/A Mobo: Micro-Star model: B450 TOMAHAWK MAX (MS-7C02) v: 1.0 serial: K717358541 UEFI [Legacy]: American Megatrends v: 3.70 date: 06/09/2020 ------------------------------------------ Graphics: Card: Advanced Micro Devices [AMD/ATI] Picasso bus-ID: 27:00.0 chip-ID: 1002:15d8 Display Server: X.Org 1.20.8 drivers: ati,amdgpu (unloaded: modesetting,fbdev,vesa) Resolution: 1680x1050@59.88hz OpenGL: renderer: AMD RAVEN (DRM 3.35.0, 5.4.0-48-generic, LLVM 10.0.0) version: 4.6 Mesa 20.0.8 Direct Render: Yes

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