the screen keeps locking while I watch video (missing support for Wayland's idle_inhibit_unstable_v1)

[Imre Péntek]

Upstream: https://gitlab.gnome.org/GNOME/mutter/issues/20

---

Reproducibility:

100% reproducible

steps to reproduce:

1. $ mpv -fv anyvideo_long_enough.anyformat
2. now please refrain from any mouse/keyboard activity, wait for the screensaver to activate
3. screensaver activates

problem:

the screensaver activates

desired behaviour:

the screensaver shouldn't activate

long description:

Hello,

the screen keeps locking while I watch video with mpv. Basically the screensaver gets activated.

but according to man mpv:

       --heartbeat-cmd=<command>

          WARNING:
              This option is redundant with Lua scripting. Further, it shouldn't be needed for disabling screensaver anyway, since mpv will call xdg-screensaver
              when using X11 backend. As a consequence this option has been deprecated with no direct replacement.

...

That all said as the screen getting locked contradicts the manpage, I consider this a bug. Thank you for the fix in advance.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: mpv 0.26.0-3ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
Uname: Linux 4.13.0-21-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 1 19:10:42 2018
InstallationDate: Installed on 2017-12-25 (7 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=hu_HU.UTF-8
 SHELL=/bin/bash
SourcePackage: mpv
UpgradeStatus: No upgrade log present (probably fresh install)

[Imre Péntek (pentek-imre)]

also I have

alias mpv='mpv --no-audio-display --volume-max=132 --cache-secs=120'

but I'm pretty sure unaliasing mpv wouldn't change the presence of the bug

[James Cowgill (jcowgill)]

Is it possible for you to test mpv 0.27?

There was a screensaver related fix, but I am not sure if it will fix your issue:
https://github.com/mpv-player/mpv/commit/82d9419f62c90cecc13c492e3b68feebe0229daa

[Daniel van Vugt (vanvugt)]

It appears Imre is using a wayland session. And starting in Ubuntu 17.10, mpv uses pure Wayland by default. This means any X11 screensaver fix is probably irrelevant.

The required feature for Wayland clients is apparently the 'idle_inhibit_unstable_v1' protocol which can be found in detail in:
  /usr/share/wayland-protocols/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml
And see also:
  https://lists.freedesktop.org/archives/wayland-devel/2016-April/027950.html
  https://blogs.s-osg.org/inhibited-wayland-desktop-part-1/

Given it's an 'unstable' protocol subject to change and that I don't see it being used in the mpv source code yet, maybe the mpv authors have decided to ignore it for now? Or maybe they don't know it exists?

Best that someone logs an issue with MPV directly to get Wayland idle inhibition support added in a future version:
  https://github.com/mpv-player/mpv/issues

[James Cowgill (jcowgill)]

It looks like support was added as part of the wayland rewrite in 0.28:
https://github.com/mpv-player/mpv/commit/68f9ee7e0b3fdddfa42fa11a15d9ae84460d5e19

[Daniel van Vugt (vanvugt)]

That's the one, thanks. We'll need to wait for v0.28

[Daniel van Vugt (vanvugt)]

Upstream bug to track:
https://github.com/mpv-player/mpv/pull/4945

[Doug McMahon (mc3man)]

As I mentioned elsewhere it's not solely a matter of mpv-0.28+, support for the protocol needs to be in mutter also.
A workaround for current wayland/mpv users is to start mpv with gnome-session-inhibit, i.e
gnome-session-inhibit mpv /path/to/file
(- at least in 0.28, may also work in 0.27

[Daniel van Vugt (vanvugt)]

Yes. And for some reason I thought it was already in mutter. But I can't find it now. So mutter also needs fixing.

[Doug McMahon (mc3man)]

forgot to mention I did file a mutter bug though it wouldn't appear to be something forthcoming soon..
https://gitlab.gnome.org/GNOME/mutter/issues/20

[Daniel van Vugt (vanvugt)]

A fix for mutter/gnome-shell is now pending:
https://gitlab.gnome.org/GNOME/mutter/merge_requests/111

[Daniel van Vugt (vanvugt)]

mpv (0.29.0-1ubuntu1) cosmic; urgency=medium

  * Rewrote 08_fix-lp1698287.patch to work with the latest mpv source code,
    allowing VAAPI to work in Wayland sessions out-of-the-box. (LP: #1698287)
  * Reintroduce mpv.conf.ubuntu to enable VAAPI acceleration by default.
    (LP: #1708102)
  * Rebased on latest Debian version 0.29.0-1.

 -- Daniel van Vugt <email address hidden> Thu, 09 Aug 2018 18:04:13 +0800

[Imre Péntek (pentek-imre)]

as far as I can tell this bug is not present in 19.10 (fixed)

[Imre Péntek (pentek-imre)]

note to self: check my home ubuntu if I have any alias set for mpv

[Doug McMahon (mc3man)]

On 2/11/20 11:16 AM, Imre Péntek wrote:
> as far as I can tell this bug is not present in 19.10 (fixed)
>
No, clearly never fixed and still an issue in 20.04.

Only way around is for user from cli to use gnome-session-inhibit mpv
/path/to/file

[Doug McMahon (mc3man)]

List of some mpv issues with gnome wayland, the window deco is somewhat mitigated by the new osc overlay that will, by default show in the absence of window deco.
https://github.com/mpv-player/mpv/wiki/FAQ#i-use-gnome-wayland-and-i-have-xyz-problem

[Imre Péntek (pentek-imre)]

nonetheless I do not experience the core issue (screensaver activating, and the unability to temporarily disable it while an mpv playback is running)

alias mpv='mpv --no-audio-display --volume-max=132 --cache-secs=120 --alang=hu'

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.10
Release: 19.10
Codename: eoan

up-to-date

[Amr Ibrahim (amribrahim1987)]

This is still an issue in Focal in Wayland. Screen blanking occurs during video playback.

[Imre Péntek (pentek-imre)]

hello this bug is still present in jammy, however

    apport-collect 1740771

says

    Package mutter not installed and no hook available, ignoring

if there's anything I can do to help you fixing this issue, let me know.

thank you in advance.

[Daniel van Vugt (vanvugt)]

The work is being tracked in https://gitlab.gnome.org/GNOME/mutter/-/issues/20

[Imre Péntek (pentek-imre)]

when the package with this patch will be released? I can confirm the bug is still present as of now (up-to-date jammy)

[Daniel van Vugt (vanvugt)]

I expect it will be in the final mutter 45.0 release (not in the beta). So it will only be in Ubuntu 23.10 and later.

[Imre Péntek (pentek-imre)]

will it be backported to 22.04 LTS?

[Daniel van Vugt (vanvugt)]

The diff looks simple enough that it might get backported in future:
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3145/diffs

But we should let the dust settle and the feature mature and get fully tested in the 45 release first.

[Imre Péntek (pentek-imre)]

bug still present in jammy

[Daniel van Vugt (vanvugt)]

Yes the fix is only in Ubuntu 23.10 and later for now.

[Imre Péntek (pentek-imre)]

will it ever be bacported?