I am having the same blank screen issues on ubuntu-mate-welcome and
software boutique on a fresh install on virtual box with 3D enabled .
Disabling 3D in virtual box fixes the issue .
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software boutique blank on a fresh install on virtual box with 3D
enabled . Disabling 3D in virtual box fixes the issue .
** Attachment added: "softwareboutique_blank.JPG"
https://bugs.launchpad.net/ubuntu/+source/ubuntu-mate-welcome/+bug/1748796/+attachment/5144544/+files/softwareboutique_bla