Comment # 2 on bug 102909 from Pander

From https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1707695 , what would
be an workaround until this bug is fixed for Ubuntu 18.10 / kernel
4.18.0-10-generic ?

Perhaps also link related bugs from
https://bugs.freedesktop.org/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&list_id=659728&query_format=advanced&short_desc=radeon%20ring%20stalled%20&short_desc_type=allwordssubstr