I found the following link:
https://forum.manjaro.org/t/new-install-amd-fx-6300-wont-wake-from-suspend/39471/10
Suggesting that setting TearFree on may help (RS780L)
However... I wonder if ShadowPrimary did not help.
Section "Device"
Identifier "Radeon"
Driver "radeon"
Option "AccelMethod" "glamor" #legacy "exa"
Option "DRI" "3" #legacy "2"
Option "TearFree" "on"
Option "ColorTiling" "on"
Option "ColorTiling2D" "on"
Option "ShadowPrimary" "on" #only possible with "glamor" AccelMethod
EndSection
Note that it should be in a file /usr/share/X11/xorg.conf.d/20-radeon.conf on
Ubuntu.
And should rename my suggested /etc/X11/xorg.conf to xorg.conf.old.
I might have temporary access to the computer in the next 48h to test
it.
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https://bugs.launchpad.net/bugs/1944991
Title:
Resume with glamor cause GPU lockup/screen corruption on Radeon 3100
Graphics" (ChipID = 0x9611)
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