Comment 5 for bug 1897224

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Daniel van Vugt (vanvugt) wrote : Re: [snap] chromium wayland won't start in Ubuntu 20.10: Unable to open X display

Xwayland is serving display ":0" and legacy X apps can use it just fine (like xterm, xeyes, xclock, bitmap). So that means the problem is probably the chromium binary. And since that's just a symlink to /usr/bin/snap this appears to be a snapd bug. Maybe.