Comment 24 for bug 1543192

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Bronek Kozicki (bronek0) wrote : Re: Xorg crashed with SIGABRT in OsAbort() from AbortServer() from FatalError() from dix_main() ["no screens found"]

Apparently, I am able to reproduce this quite easily with Xubuntu 18.04 as seen in bug #1815429 . The workaround which works for me is to add the ppa:xubuntu-dev/experimental and upgrade xfwm4 to version 4.13