@Gunnar asked: > @Doug: Are you using Nouveau or some other graphics driver?
Both desktop computers (one an old MAC with 18.04, and one the old HP LapTop I revived the other day with (now) 19.04) are using Radeon drivers. From the command you gave me off-list: $ lspci -nnk | grep -i vga -A3 | grep 'in use' Kernel driver in use: radeon Attached is an edited (core dump removed) crash dump file from a yelp crash while trying to "save video as", as per note 2 in the bug description. The interesting stuff starts at line 2019: 2019: May 17 13:48:42 cyd-hp2 yelp[3740]: Invalid UTF-8 string passed to pango_layout_set_text() The originating error was: yelp assert failure: free(): double free detected in tcache 2 ** Attachment added: "_usr_bin_yelp.1000.crash" https://bugs.launchpad.net/ubuntu/+source/gnome-getting-started-docs/+bug/1804786/+attachment/5264887/+files/_usr_bin_yelp.1000.crash -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1804786 Title: Garbage occurred when Playing the video in the Ubuntu Desktop Guide To manage notifications about this bug go to: https://bugs.launchpad.net/yelp/+bug/1804786/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs