Bug 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 Reporter: Michael Catanzaro <mcatanzaro>
Component: WebKitGTKAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: bugs-noreply, mcatanzaro, philn
Priority: P2    
Version: WebKit Nightly Build   
Hardware: All   
OS: All   

Description Michael Catanzaro 2023-10-16 12:43:37 PDT 
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?
Comment 1 Michael Catanzaro 2024-01-16 08:02:25 PST 
Still broken in WebKitGTK 2.43.3. The web inspector works fine in a freshly-launched Epiphany. I think it breaks only after Epiphany has been open for a while.
Comment 2 Philippe Normand 2024-02-12 06:37:38 PST 
Dunno if related or not, here the inspector server is broken. When i click on a target to inspect, the window opens but nothing renders, there is a webview (mouse cursor changes) when i move the mouse around in that window, but nothing renders.

In journal:

Failed to create GBM buffer of size 0x0: Invalid argument
Comment 3 Michael Catanzaro 2024-02-12 06:41:11 PST 
(In reply to Philippe Normand from comment #2)
> Failed to create GBM buffer of size 0x0: Invalid argument

That one is bug #265154
Comment 4 Michael Catanzaro 2024-06-11 06:49:19 PDT 
Still broken. I noticed this again today using 2.44.2 in Ephy Tech Preview.