Bug 93514

Summary:	weston fullscreen shell doesn't display anything sometimes even with a client
Product:	Wayland	Reporter:	nerdopolis1
Component:	weston	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	krejzi
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	log of the fullscreen Weston server, with weston-fullscreen as a client log of the fullscreen Weston server, with a weston client as a client log of the fullscreen client log of the Weston server that was the client to the fullscreen-shell host

Description nerdopolis1 2015-12-27 00:55:12 UTC

It seems to affect some clients, such as greenisland, and Weston itself (when it's running as a client of a weston instance working as a fullscreen host.


I noticed one interesting pattern though is that previously when running weston as a client of a weston fullscreen shell, nothing will appear, until the screen saver turned on. This was a while back though.

I had just remembered this issue though


the sample weston-fullscreen client works everytime, however

Comment 1 nerdopolis1 2015-12-27 04:11:25 UTC

Created attachment 120704 [details]
log of the fullscreen Weston server, with weston-fullscreen as a client

WAYLAND_DEBUG=server

Comment 2 nerdopolis1 2015-12-27 04:12:12 UTC

Created attachment 120705 [details]
log of the fullscreen Weston server, with a weston client as a client

Comment 3 nerdopolis1 2015-12-27 04:13:01 UTC

Created attachment 120706 [details]
log of the fullscreen client

WAYLAND_DEBUG=client

Comment 4 nerdopolis1 2015-12-27 04:18:02 UTC

Created attachment 120707 [details]
log of the Weston server that was the client to the fullscreen-shell host

WAYLAND_DEBUG=client

Comment 5 nerdopolis1 2015-12-31 01:11:08 UTC

by setting ret = 0; on

http://cgit.freedesktop.org/wayland/weston/tree/fullscreen-shell/fullscreen-shell.c#n495

I get it to work as a workaround (which obviously isn't a good one), I might try to throw a few more print statements in there?

Comment 6 Armin K 2016-08-05 10:40:41 UTC

The problem with this is that it depends on modesetting API, which not all backends support. And even on those that support it, it's still not always guaranteed to work as it may request modeset to a mode not supported by the display. The permanent solution would be to move away from using modeswitching api entirely and play with some scaling.

Comment 7 Armin K 2016-08-05 10:41:39 UTC

I've also noticed same problem under desktop-shell when starting the backend with --sprawl.

Comment 8 n3rdopolis 2017-01-06 01:59:51 UTC

Hi

It appears that this issue is still present, and I am still able to work around it by setting ret = 0;

Thanks

Comment 9 Armin K 2017-02-07 20:05:26 UTC

This patch might fix it:

https://lists.freedesktop.org/archives/wayland-devel/2017-February/033009.html

Comment 10 n3rdopolis 2017-02-10 02:36:05 UTC

Hi

That patch seems to work!

Thanks

Comment 11 Pekka Paalanen 2017-10-13 12:55:03 UTC

I have landed the patch, are we good to close this bug now?

Comment 12 n3rdopolis 2017-10-15 00:44:58 UTC

Hi
Weston appears to be able to run another another weston with the fullscreen-shell shell now.

Thanks!

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