Having recently tried upgrading an 18.04 system to 19.10, I can confirm ~rigues 's behavior - complete screen corruption after resuming from suspend when using the Nouveau driver (NVidia driver only partly corrupts).
However, this (corrupted screen, no workaround) might be different enough from a corrupted wallpaper (which can be dismissed) that it warrants a separate/new bug report?
Having recently tried upgrading an 18.04 system to 19.10, I can confirm ~rigues 's behavior - complete screen corruption after resuming from suspend when using the Nouveau driver (NVidia driver only partly corrupts).
However, this (corrupted screen, no workaround) might be different enough from a corrupted wallpaper (which can be dismissed) that it warrants a separate/new bug report?