[Webkit-unassigned] [Bug 263208] New: [GTK] Web inspector does not render anything: Failed to create GBM device for render device: /dev/dri/renderD128: No such file or directory

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=263208

            Bug ID: 263208
           Summary: [GTK] Web inspector does not render anything: Failed
                    to create GBM device for render device:
                    /dev/dri/renderD128: No such file or directory
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at redhat.com
                CC: bugs-noreply at webkitgtk.org

Using Epiphany Tech Preview with WebKitGTK 2.42.1, I notice the web inspector occasionally breaks and fails to render anything. When this happens, I see the following scary errors in my journal:

Oct 16 14:35:44 chargestone-cave org.gnome.Epiphany.Devel.desktop[111657]: Failed to create GBM device for render device: /dev/dri/renderD128: No such file or directory
Oct 16 14:35:44 chargestone-cave org.gnome.Epiphany.Devel.desktop[111657]: Cannot get default EGL display: EGL_BAD_PARAMETER
Oct 16 14:35:44 chargestone-cave org.gnome.Epiphany.Devel.desktop[111657]: Cannot create EGL context: invalid display (last error: EGL_SUCCESS)

I wonder why is it trying to open a render device that doesn't exist? That device actually *does* exist inside the flatpak sandbox of the broken Epiphany instance:

$ flatpak enter org.gnome.Epiphany.Devel ls /dev/dri
by-path  card1  renderD128

Maybe it's not accessible inside the flatpak-spawn subsandbox?

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