Description of problem: It seems to me that gnome-shell crashes with a JS ERROR when it tries to start Xwayland by gdm and any monitors are disconnected. This happens to my new Fedora 25 installation. Previously, with Fedora 24, this didn't happen. After booting the desktop system (for example, FUJITSU ESPRIMO P920 with Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz, containing Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller, driver=i915), I found that Xorg is running by gdm, instead of Xwayland. journalctl tells me: Feb 06 10:48:01 mydesktop.example.com gnome-session[1979]: gnome-session-binary[1979]: WARNING: Error getting login monitor: -13 Feb 06 10:48:01 mydesktop.example.com gnome-session-binary[1979]: WARNING: Error getting login monitor: -13 Feb 06 10:48:20 mydesktop.example.com gnome-shell[1986]: JS ERROR: TypeError: this.primaryMonitor is undefined LayoutManager<._updateBoxes@resource:///org/gnome/shell/ui/layout.js:461 wrapper@resource:///org/gnome/gjs/modules/lang.js:178 LayoutManager<._monitorsChanged@resource:///org/gnome/shell/ui/layout.js:495 wrapper@resource:///org/gnome/gjs/modules/lang.js:178 LayoutManager<._init@resource:///org/gnome/shell/ui/layout.js:277 wrapper@resource:///org/gnome/gjs/modules/lang.js:178 _Base.prototype._construct@resource:///org/gnome/gjs/modules/lang.js:110 Class.prototype._construct/newClass@resource:///org/gnome/gjs/modules/lang.js:213 _initializeUI@resource:///org/gnome/shell/ui/main.js:151 start@resource:///org/gnome/shell/ui/main.js:125 @<main>:1 Feb 06 10:48:20 mydesktop.example.com gnome-shell[1986]: Execution of main.js threw exception: JS_EvaluateScript() failed Feb 06 10:48:20 mydesktop.example.com org.gnome.Shell.desktop[1986]: (EE) Feb 06 10:48:20 mydesktop.example.com org.gnome.Shell.desktop[1986]: Fatal server error: Feb 06 10:48:20 mydesktop.example.com org.gnome.Shell.desktop[1986]: (EE) failed to read Wayland events: Connection reset by peer Feb 06 10:48:20 mydesktop.example.com org.gnome.Shell.desktop[1986]: (EE) Output of "cat /sys/kernel/debug/dri/0/i915_display_info | grep connected": connector 36: type VGA-1, status: disconnected connector 39: type HDMI-A-1, status: disconnected connector 44: type DP-1, status: disconnected connector 48: type HDMI-A-2, status: disconnected This happens only if no connector is in status connected (e.g. display is off). Then Xwayland didn't start by gdm, and Xorg is used by gdm. Otherwise Xwayland is running by gdm. Version-Release number of selected component (if applicable): gnome-shell-3.22.2-2.fc25.x86_64 gnome-session-3.22.2-3.fc25.x86_64 gnome-session-xsession-3.22.2-3.fc25.x86_64 gnome-session-wayland-session-3.22.2-3.fc25.x86_64 How reproducible: I tested serveral desktop pcs, it seems reproducable. Steps to Reproduce: 1. (Re)Boot a desktop with display off. 2. (Re)Boot a desktop with display on. Actual results: 1: Xorg is running by gdm. 2: Xwayland is running by gdm. Expected results: 1: Xwayland is running by gdm. 2: Xwayland is running by gdm.
It may be that GNOME bug 730551 is related? https://bugzilla.gnome.org/show_bug.cgi?id=730551
(In reply to Edgar Hoch from comment #1) > It may be that GNOME bug 730551 is related? Yes. Mutter currently doesn't support running headless, no matter whether running as X11 compositor or wayland display server.
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