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; * etc/PROBLEMS: Add an entry about WebKitGTK (bug#66068).

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Eli Zaretskii 2024-04-01 15:24:47 +03:00
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etc/PROBLEMS
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@ -178,6 +178,32 @@ The relevant bug report is here:
A workaround is to set XLIB_SKIP_ARGB_VISUALS=1 in the environment
before starting Emacs, or run Emacs as root.
** Emacs built with xwidgets aborts when displaying WebKit xwidgets
This happens, for example, when 'M-x xwidget-webkit-browse-url'
prompts for a URL and you type the URL at the prompt.
The error message might look like this:
X protocol error: GLXBadWindow on protocol request 151
Serial no: 4286
Failing resource ID (if any): 0x3c001c5
Minor code: 32
This happens because starting from version 2.42.1, the WebKitGTK
developers discontinued support for off-screen windows, by presuming
that every window holding a WebView widget is an X server window
eligible for an OpenGL context. Emacs requires placing these widgets
within offscreen windows managed by GTK, for each xwidget might be
displayed in multiple distinct windows, and its contents must be
captured and reproduced within all of them if that be the case.
To put this another way, WebKitGTK doesn't support displaying a single
widget more than once anymore.
A possible workaround is to make sure xwidgets are not shown in more
than one window.
** Emacs crashes with SIGTRAP when trying to start a WebKit xwidget.
This could happen if the version of WebKitGTK installed on your system