Back on the subject of this bug, it may be related to changes in the fd numbers of -listen and -displayfd passed to Xwayland in mutter 3.38. If that's relevant at all then it's probably still a snapd issue.
** Changed in: mutter (Ubuntu) Status: In Progress => Invalid ** Changed in: mutter (Ubuntu) Assignee: Daniel van Vugt (vanvugt) => (unassigned) ** Summary changed: - [snap] chromium wayland won't start in Ubuntu 20.10: Unable to open X display + [snap] chromium won't start on Xwayland in Ubuntu 20.10: Unable to open X display -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1897224 Title: [snap] chromium won't start on Xwayland in Ubuntu 20.10: Unable to open X display Status in chromium-browser package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Invalid Status in snapd package in Ubuntu: Confirmed Bug description: I'm trying to run chromium installed via snap in Ubuntu 20.10 when running Ubuntu Wayland session. Unfortunately, chromium wouldn't start: > chromium [49244:49244:0925/094607.732169:ERROR:browser_main_loop.cc(1417)] Unable to open X display. I am able to run Firefox just fine (assuming that Firefox still runs on xwayland) and also Intellij snap works fine. ProblemType: Bug DistroRelease: Ubuntu 20.10 ProcVersionSignature: Ubuntu 5.8.0-19.20-generic 5.8.8 Uname: Linux 5.8.0-19-generic x86_64 ApportVersion: 2.20.11-0ubuntu47 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Fri Sep 25 09:45:16 2020 InstallationDate: Installed on 2016-09-05 (1480 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Snap: chromium 85.0.4183.121 (latest/stable) SnapSource: ubuntu/+source/chromium-browser UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1897224/+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