[Webkit-unassigned] [Bug 228268] New: Nothing visible unless dragged with mouse

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228268

            Bug ID: 228268
           Summary: Nothing visible unless dragged with mouse
           Product: WebKit
           Version: WebKit Local Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: limesayahi at gmail.com
                CC: bugs-noreply at webkitgtk.org

Hello! This is my first time submitting a bug report, so apologies if I'm not as helpful as I should be.

I'm currently successfully building `libwebkitgtk-5.0`, and I've embedded it as part of developing a new browser project.
I was originally using the stable release of WebKitGTK from the Arch Linux package repositories, but as part of porting my browser to GTK4 I've had to recompile the library myself for GTK4 support (here's the script I wrote to do this: https://raw.githubusercontent.com/Dirout/oku/50c1bd443ac50943b359b16e9d3a140faa604c89/build-dependencies.sh)

Presently, this build of WebKitGTK is completely blank—no content or developer tools menu elements visible—unless I select and drag something offscreen, at which point it becomes visible until I let go of the mouse again.
Perhaps this rendering bug is connected to the fact that I have an Nvidia GPU? I'll need to do further testing on an old laptop I have somewhere.

Additionally, almost all page loads fail while emitting any of the following warnings:
```
(process:70483): GLib-Net-WARNING **: 17:44:39.051: ../glib-networking/tls/gnutls/gtlscertificate-gnutls.c:161: invalid property id 3 for "private-key" of type 'GParamBoxed' in 'GTlsCertificateGnutls'

(process:67609): GLib-GIO-WARNING **: 17:13:47.931: ../subprojects/glib/gio/gtlsconnection.c:397: invalid property id 12 for "protocol-version" of type 'GParamEnum' in 'GTlsClientConnectionGnutls'

(process:67609): GLib-GIO-WARNING **: 17:13:47.931: ../subprojects/glib/gio/gtlsconnection.c:397: invalid property id 13 for "ciphersuite-name" of type 'GParamString' in 'GTlsClientConnectionGnutls'
```

In the browser, the page contents simply are 'Error reading data from TLS socket: The specified session has been invalidated for some reason.' or, sometimes, 'Could not parse HTTP response'.
This is not always reproducible, sometimes, rarely, page loads just randomly work, but 99% of the time they don't.
I've tried Google, YouTube, Reddit, 'https://example.com', and 'https://www.iana.org/domains/reserved'.
My best guess is that this is some bug introduced in `libsoup-3.0`, maybe in its `glib` dependency? I had to recompile `libsoup` as well, for the same reasons I had to recompile WebKitGTK.

My biggest concern, by far, is the visibility issue. It does appear that things are being rendered, it's just pure white unless I drag things away with my mouse.
To be clear, every other GUI element of my GTK app is visible and working properly, it's just the WebView which is experiencing this.

I'm running Arch Linux with GNOME DE, X11 (because Nvidia GPU), using proprietary Nvidia drivers, with all installed packages up-to-date.

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