Verified the fix is present in mutter_3.36.3.orig.tar.xz but as mentioned above, no known test case.
** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done verification-done-focal ** Description changed: [Impact] This is the #1 crasher of gnome-shell in Ubuntu 20.04, though it's duplicated across multiple problem reports according to locale: https://errors.ubuntu.com/problem/4de3d315d9df1c9699bda54beafeeeea8d52053c https://errors.ubuntu.com/problem/2251b638f7a6167772f922dc5916740522c5c22b https://errors.ubuntu.com/problem/943838b8a80c1da4f8df584b7d2ad3a13361fdd7 https://errors.ubuntu.com/problem/4b78bc9730e8681f0c42fc2ecea14d03544394f0 [Test Case] None known. The plan is to just continue monitoring crash reports. Still, we are confident this is the fix because: * The offending source code in libx11 tells us it is :) and * The crash only started in Ubuntu with gnome-shell 3.34, which is the exact release in which XInitThreads was removed from mutter. [Regression Potential] Low. We add a single function call that tells libX11 to enable thread - safety. This same function call as one we had in bionic, cosmic and - disco. + safety. This is the same as what we had in bionic, cosmic and disco, so + it's well tested. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1877075 Title: gnome-shell crashed at xcb_io.c:260: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost'' failed Status in Mutter: Unknown Status in mutter package in Ubuntu: Fix Released Status in mutter source package in Focal: Fix Committed Status in mutter source package in Groovy: Fix Released Bug description: [Impact] This is the #1 crasher of gnome-shell in Ubuntu 20.04, though it's duplicated across multiple problem reports according to locale: https://errors.ubuntu.com/problem/4de3d315d9df1c9699bda54beafeeeea8d52053c https://errors.ubuntu.com/problem/2251b638f7a6167772f922dc5916740522c5c22b https://errors.ubuntu.com/problem/943838b8a80c1da4f8df584b7d2ad3a13361fdd7 https://errors.ubuntu.com/problem/4b78bc9730e8681f0c42fc2ecea14d03544394f0 [Test Case] None known. The plan is to just continue monitoring crash reports. Still, we are confident this is the fix because: * The offending source code in libx11 tells us it is :) and * The crash only started in Ubuntu with gnome-shell 3.34, which is the exact release in which XInitThreads was removed from mutter. [Regression Potential] Low. We add a single function call that tells libX11 to enable thread safety. This is the same as what we had in bionic, cosmic and disco, so it's well tested. To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1877075/+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
