@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 Desktop Packages, which is subscribed to gnome-getting-started-docs in Ubuntu. https://bugs.launchpad.net/bugs/1804786 Title: Garbage occurred when Playing the video in the Ubuntu Desktop Guide Status in Yelp: Confirmed Status in gnome-getting-started-docs package in Ubuntu: Confirmed Bug description: Garbage occurred when Playing the video in the Ubuntu Desktop Guide. Reproduce step 1. Ubuntu 18.04.1. 2. ubuntu-docs 18.04.4 3. Playing the video(Launch applications) from Help-->Getting started with GNOME. 4. Garbage occurred after the video repeat about 3 times==> issue. Expected results: The Video can be played normally no-matter how many times. Actual results: Garbage occurred after the video repeat about 3 times Note: 1. the video will show blank but still have the voice after the issue finish. 2. Right click the mouse and choice "save video as", this application will crashed ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-docs 18.04.4 ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18 Uname: Linux 4.15.0-39-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Nov 23 16:46:00 2018 InstallationDate: Installed on 2018-04-30 (206 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) PackageArchitecture: all SourcePackage: ubuntu-docs UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/yelp/+bug/1804786/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp