Xwayland fatal error when Wayland output disappears

[Olivier Fourdan]

Hi,

Could you please post a backtrace, breaking on xwl_log_handler() ?

Another interesting data to capture would be the WAYLAND_DEBUG logs
(between Xwayland and gnome-shell)

wl_registry_bind() occurs when actually binding to an interface, which in
the case of wl_output occurs when adding a new output, not removing it.

Cheers,
Olivier


On 26 October 2017 at 15:40, Michael Thayer <michael.thayer at oracle.com>
wrote:

> Hello,
>
> Reporting this here in case it is of interest.  I have been debugging
> regular desktop crashes on my new Ubuntu 17.10 systems.  One of them
> seems to happen when Xwayland FatalError-s out because a Wayland output
> disappears.  I have only investigated this so far, but hopefully this
> will be helpful to someone who knows it better: the error is
> "wl_registry at 2: error 0: invalid global wl_output (28)", which seems to
> be posted by wl_registry_bind in wayland-server.c, and get picked up in
> xwl_log_handler in Xwayland.  Xwayland exiting in turn causes GNOME
> Shell to panic.
>
> Regards
> Michael
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