Devuan bug report logs - #433
vlc-plugin-qt: VLC Qt UI doesn't start in the presense of QT_QPA_PLATFORMTHEME, GTK_CSD and LD_PRELOAD

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Package: vlc-plugin-qt; Maintainer for vlc-plugin-qt is (unknown);

Reported by: andrewbass@gmail.com

Date: Mon, 27 Apr 2020 21:03:02 UTC

Severity: grave

Tags: debian

Found in version 3.0.8-0+deb10u1

Forwarded to https://bugs.debian.org/959050

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Report forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#433; Package vlc-plugin-qt. (Mon, 27 Apr 2020 21:03:02 GMT) (full text, mbox, link).


Acknowledgement sent to andrewbass@gmail.com:
New bug report received and forwarded. Copy sent to devuan-dev@lists.dyne.org. (Mon, 27 Apr 2020 21:03:04 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.devuan.org (full text, mbox, reply):

From: Andrey ``Bass'' Shcheglov <andrewbass@gmail.com>
To: Devuan Bug Tracking System <submit@bugs.devuan.org>
Subject: vlc-plugin-qt: VLC Qt UI doesn't start in the presense of QT_QPA_PLATFORMTHEME, GTK_CSD and LD_PRELOAD
Date: Mon, 27 Apr 2020 23:43:01 +0300
Package: vlc-plugin-qt
Version: 3.0.8-0+deb10u1
Severity: grave

Dear Maintainer,

I have all my Qt 5 applications rendering their UI via GTK2
(this means I have qt5-style-plugins package installed):

> QT_QPA_PLATFORMTHEME=gtk2
> QT_STYLE_OVERRIDE=gtk2

Additionally, for my GTK3 applications, I have client-side decorations
disabled (with gtk3-nocsd and libgtk3-nocsd0 packages installed):

> GTK_CSD=0
> LD_PRELOAD=libgtk3-nocsd.so.0

The above should have nothing to do with GTK2 UI rendering, still it
affects vlc (actuallly, vlc-plugin-qt) in Debian Buster/Devuan Beowulf
(everything worked fine in Debian Stretch/Devuan ASCII).

Also, I have to mention that cvlc (without Qt UI) works fine.

Now, to the problem.

Whenever vlc is laucnhed in the above environment:

> $ QT_QPA_PLATFORMTHEME=gtk2 QT_STYLE_OVERRIDE=gtk2 GTK_CSD=0 \
> LD_PRELOAD=libgtk3-nocsd.so.0 vlc

-- it prints the following and just hangs, w/o even showing a
window:

> VLC media player 3.0.8 Vetinari (revision 3.0.8-0-gf350b6b5a7)
> 
> (vlc:25026): GLib-GObject-WARNING **: 23:35:25.110: cannot register
> existing type 'GtkBuildable'
> 
> (vlc:25026): GLib-GObject-CRITICAL **: 23:35:25.110:
> g_type_interface_add_prerequisite: assertion 'G_TYPE_IS_INTERFACE
> (interface_type)' failed
> 
> (vlc:25026): GLib-CRITICAL **: 23:35:25.110: g_once_init_leave:
> assertion 'result != 0' failed
> 
> (vlc:25026): GLib-GObject-WARNING **: 23:35:25.111: cannot register
> existing type 'GtkWidget'
> 
> (vlc:25026): GLib-GObject-WARNING **: 23:35:25.111: cannot add class
> private field to invalid type '<invalid>'
> 
> (vlc:25026): GLib-GObject-WARNING **: 23:35:25.111: cannot add private
> field to invalid (non-instantiatable) type '<invalid>'

I can also provide the output of `vlc -vvv` here, but it wouldn't be
indicative, as, the above errors are purely GTK-specific.

*If* I change either GTK_CSD to 1 or LD_PRELOAD to an empty string (or
Qt UI style to anything different from gtk2), then vlc starts just fine
and shows its window, controls, etc.

All other (even complex) Qt 5 applications (assistant, designer,
wireshark, KDE appplications etc.) are not affected by either GTK_CSD
or LD_PRELOAD.

The problem is reproducible using a new clean user profile with default
vlc settings.


Regards,
Andrey.

-- System Information:
Distributor ID:	Debian
Description:	Devuan GNU/Linux 3 (beowulf)
Release:	3
Codename:	beowulf
Architecture: x86_64

Kernel: Linux 4.19.0-8-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8),
LANGUAGE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages vlc-plugin-qt depends on:
ii  libc6                                2.28-10
ii  libgcc1                              1:8.3.0-6
ii  libqt5core5a                         5.11.3+dfsg1-1+deb10u2
ii  libqt5gui5                           5.11.3+dfsg1-1+deb10u2
ii  libqt5svg5                           5.11.3-2
ii  libqt5widgets5                       5.11.3+dfsg1-1+deb10u2
ii  libqt5x11extras5                     5.11.3-2
ii  libstdc++6                           8.3.0-6
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1
ii  libwayland-client0                   1.16.0-1
ii  libx11-6                             2:1.6.7-1

Versions of packages vlc-plugin-qt recommends:
ii  vlc-bin  3.0.8-0+deb10u1

vlc-plugin-qt suggests no packages.

Versions of packages libvlc-bin depends on:
ii  libc6    2.28-10
ii  libvlc5  3.0.8-0+deb10u1

Versions of packages libvlc5 depends on:
ii  libc6        2.28-10
ii  libvlccore9  3.0.8-0+deb10u1

Versions of packages libvlc5 recommends:
ii  libvlc-bin  3.0.8-0+deb10u1

Versions of packages vlc depends on:
ii  vlc-bin                  3.0.8-0+deb10u1
ii  vlc-plugin-base          3.0.8-0+deb10u1
ii  vlc-plugin-video-output  3.0.8-0+deb10u1

Versions of packages vlc recommends:
ii  vlc-l10n                   3.0.8-0+deb10u1
ii  vlc-plugin-notify          3.0.8-0+deb10u1
ii  vlc-plugin-samba           3.0.8-0+deb10u1
ii  vlc-plugin-skins2          3.0.8-0+deb10u1
ii  vlc-plugin-video-splitter  3.0.8-0+deb10u1
ii  vlc-plugin-visualization   3.0.8-0+deb10u1

Versions of packages vlc-bin depends on:
ii  libc6       2.28-10
ii  libvlc-bin  3.0.8-0+deb10u1
ii  libvlc5     3.0.8-0+deb10u1

Versions of packages vlc-plugin-base depends on:
ii  liba52-0.7.4                         0.7.4-19
ii  libaom0                              1.0.0-3
ii  libarchive13                         3.3.3-4+deb10u1
ii  libaribb24-0                         1.0.3-2
ii  libasound2                           1.1.8-1
ii  libass9                              1:0.14.0-2
ii  libavahi-client3                     0.7-4+b1
ii  libavahi-common3                     0.7-4+b1
ii  libavc1394-0                         0.5.4-5
ii  libavcodec58                         7:4.1.4-1~deb10u1
ii  libavformat58                        7:4.1.4-1~deb10u1
ii  libavutil56                          7:4.1.4-1~deb10u1
ii  libbasicusageenvironment1            2018.11.26-1.1
ii  libbluray2                           1:1.1.0-1
ii  libc6                                2.28-10
ii  libcairo2                            1.16.0-4
ii  libcddb2                             1.3.2-6
ii  libchromaprint1                      1.4.3-3
ii  libcrystalhd3                        1:0.0~git20110715.fdd2f19-13
ii  libdbus-1-3                          1.12.16-1+devuan2
ii  libdc1394-22                         2.2.5-1
ii  libdca0                              0.0.6-1
ii  libdvbpsi10                          1.3.2-1
ii  libdvdnav4                           6.0.0-1
ii  libdvdread4                          6.0.1-1
ii  libebml4v5                           1.3.6-2
ii  libelogind0 [libsystemd0]            241.4-2
ii  libeudev1 [libudev1]                 3.2.7-6
ii  libfaad2                             2.8.8-3
ii  libflac8                             1.3.2-3
ii  libfontconfig1                       2.13.1-2
ii  libfreetype6                         2.9.1-3+deb10u1
ii  libfribidi0                          1.0.5-3.1+deb10u1
ii  libgcc1                              1:8.3.0-6
ii  libgcrypt20                          1.8.4-5
ii  libglib2.0-0                         2.58.3-2+deb10u2
ii  libgnutls30                          3.6.7-4+deb10u2
ii  libgpg-error0                        1.35-1
ii  libgroupsock8                        2018.11.26-1.1
ii  libharfbuzz0b                        2.3.1-1
ii  libixml10                            1:1.8.4-2
ii  libjpeg62-turbo                      1:1.5.2-2+b1
ii  libkate1                             0.4.1-9
ii  liblirc-client0                      0.10.1-5.2
ii  liblivemedia64                       2018.11.26-1.1
ii  liblua5.2-0                          5.2.4-1.1+b2
ii  libmad0                              0.15.1b-10
ii  libmatroska6v5                       1.4.9-1+deb10u1
ii  libmicrodns0                         0.0.10-1
ii  libmpcdec6                           2:0.1~r495-1+b2
ii  libmpeg2-4                           0.5.1-8
ii  libmpg123-0                          1.25.10-2
ii  libmtp9                              1.1.16-2
ii  libncursesw6                         6.1+20181013-2+deb10u2
ii  libnfs12                             3.0.0-2
ii  libogg0                              1.3.2-1+b1
ii  libopenmpt-modplug1                  0.4.3-1
ii  libopus0                             1.3-1
ii  libpng16-16                          1.6.36-6
ii  libpostproc55                        7:4.1.4-1~deb10u1
ii  libprotobuf-lite17                   3.6.1.3-2
ii  libpulse0                            12.2-4+deb10u1
ii  libraw1394-11                        2.1.2-1+b1
ii  libresid-builder0c2a                 2.1.1-15
ii  librsvg2-2                           2.44.10-2.1
ii  libsamplerate0                       0.1.9-2
ii  libsdl-image1.2                      1.2.12-10+deb10u1
ii  libsdl1.2debian                      1.2.15+dfsg2-4
ii  libsecret-1-0                        0.18.7-1
ii  libshine3                            3.1.1-2
ii  libshout3                            2.4.1-2
ii  libsidplay2                          2.1.1-15
ii  libsndio7.0                          1.5.0-3
ii  libsoxr0                             0.1.2-3
ii  libspatialaudio0                     0.3.0+git20180730+dfsg1-2
ii  libspeex1                            1.2~rc1.2-1+b2
ii  libspeexdsp1                         1.2~rc1.2-1+b2
ii  libssh2-1                            1.8.0-2.1
ii  libstdc++6                           8.3.0-6
ii  libswscale5                          7:4.1.4-1~deb10u1
ii  libtag1v5                            1.11.1+dfsg.1-0.3
ii  libtheora0                           1.1.1+dfsg.1-15
ii  libtinfo6                            6.1+20181013-2+deb10u2
ii  libtwolame0                          0.3.13-4
ii  libudev1                             1:3.2.7+devuan1.1
ii  libupnp13                            1:1.8.4-2
ii  libusageenvironment3                 2018.11.26-1.1
ii  libva-drm2                           2.4.0-1
ii  libva2                               2.4.0-1
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1
ii  libvorbis0a                          1.3.6-2
ii  libvorbisenc2                        1.3.6-2
ii  libx264-155                          2:0.155.2917+git0a84d98-2
ii  libx265-165                          2.9-4
ii  libxcb-keysyms1                      0.4.0-1+b2
ii  libxcb1                              1.13.1-2
ii  libxml2                              2.9.4+dfsg1-7+b3
ii  libzvbi0                             0.2.35-16
ii  vlc-data                             3.0.8-0+deb10u1
ii  zlib1g                               1:1.2.11.dfsg-1

Versions of packages vlc-plugin-base recommends:
ii  xdg-utils  1.1.3-1

Versions of packages vlc-plugin-base suggests:
ic  libdvd-pkg [libdvdcss2]  1.4.0-1-2

Versions of packages vlc-plugin-notify depends on:
ii  libc6                                2.28-10
ii  libgdk-pixbuf2.0-0                   2.38.1+dfsg-1
ii  libglib2.0-0                         2.58.3-2+deb10u2
ii  libgtk-3-0                           3.24.5-1
ii  libnotify4                           0.7.7-4
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1

Versions of packages vlc-plugin-skins2 depends on:
ii  fonts-freefont-ttf                   20120503-9
ii  libc6                                2.28-10
ii  libfreetype6                         2.9.1-3+deb10u1
ii  libfribidi0                          1.0.5-3.1+deb10u1
ii  libgcc1                              1:8.3.0-6
ii  libstdc++6                           8.3.0-6
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1
ii  libx11-6                             2:1.6.7-1
ii  libxext6                             2:1.3.3-1+b2
ii  libxinerama1                         2:1.1.4-2
ii  libxpm4                              1:3.5.12-1

Versions of packages vlc-plugin-skins2 recommends:
ii  vlc-bin  3.0.8-0+deb10u1

Versions of packages vlc-plugin-video-output depends on:
ii  libaa1                               1.4p5-46
ii  libavcodec58                         7:4.1.4-1~deb10u1
ii  libavutil56                          7:4.1.4-1~deb10u1
ii  libc6                                2.28-10
ii  libcaca0                             0.99.beta19-2.1
ii  libegl1                              1.1.0-1
ii  libgl1                               1.1.0-1
ii  libgles2                             1.1.0-1
ii  libplacebo7                          1.7.0-2
ii  libva-drm2                           2.4.0-1
ii  libva-wayland2                       2.4.0-1
ii  libva-x11-2                          2.4.0-1
ii  libva2                               2.4.0-1
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1
ii  libwayland-client0                   1.16.0-1
ii  libwayland-egl1                      1.16.0-1
ii  libx11-6                             2:1.6.7-1
ii  libxcb-keysyms1                      0.4.0-1+b2
ii  libxcb-shm0                          1.13.1-2
ii  libxcb-xv0                           1.13.1-2
ii  libxcb1                              1.13.1-2

Versions of packages vlc-plugin-video-splitter depends on:
ii  libc6                                2.28-10
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1
ii  libxcb-randr0                        1.13.1-2
ii  libxcb1                              1.13.1-2

Versions of packages vlc-plugin-visualization depends on:
ii  libc6                                2.28-10
ii  libgl1                               1.1.0-1
ii  libvlccore9 [vlc-plugin-abi-3-0-0f]  3.0.8-0+deb10u1

-- no debconf information

Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#433; Package vlc-plugin-qt. (Tue, 28 Apr 2020 12:33:01 GMT) (full text, mbox, link).


Message #8 received at 433@bugs.devuan.org (full text, mbox, reply):

From: Mark Hindley <mark@hindley.org.uk>
To: 433@bugs.devuan.org, Andrey ``Bass'' Shcheglov <andrewbass@gmail.com>
Subject: Re: vlc-plugin-qt: VLC Qt UI doesn't start in the presense of QT_QPA_PLATFORMTHEME, GTK_CSD and LD_PRELOAD
Date: Tue, 28 Apr 2020 13:25:12 +0100
Control: tags -1 debian

Andrey,

On Mon, 27 Apr 2020 23:43:01 +0300 Andrey ``Bass'' Shcheglov <andrewbass@gmail.com> wrote:
> Package: vlc-plugin-qt
> Version: 3.0.8-0+deb10u1
> Severity: grave
> 
> Dear Maintainer,
> 
> I have all my Qt 5 applications rendering their UI via GTK2
> (this means I have qt5-style-plugins package installed):
> 
> > QT_QPA_PLATFORMTHEME=gtk2
> > QT_STYLE_OVERRIDE=gtk2
> 
> Additionally, for my GTK3 applications, I have client-side decorations
> disabled (with gtk3-nocsd and libgtk3-nocsd0 packages installed):

Thanks for this. None of these packages are forked in Devuan and we use Debian's
packages directly. You would be better reporting this issue to Debian BTS.

Thanks.

Mark

Added tag(s) debian. Request was from Mark Hindley <mark@hindley.org.uk> to 433-submit@bugs.devuan.org. (Tue, 28 Apr 2020 12:33:04 GMT) (full text, mbox, link).


Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#433; Package vlc-plugin-qt. (Tue, 28 Apr 2020 20:18:01 GMT) (full text, mbox, link).


Acknowledgement sent to andrewbass@gmail.com:
Extra info received and forwarded to list. Copy sent to devuan-dev@lists.dyne.org. (Tue, 28 Apr 2020 20:18:04 GMT) (full text, mbox, link).


Message #15 received at 433@bugs.devuan.org (full text, mbox, reply):

From: "Andrey ``Bass'' Shcheglov" <andrewbass@gmail.com>
To: Mark Hindley <mark@hindley.org.uk>
Cc: 433@bugs.devuan.org
Subject: Re: vlc-plugin-qt: VLC Qt UI doesn't start in the presense of QT_QPA_PLATFORMTHEME, GTK_CSD and LD_PRELOAD
Date: Tue, 28 Apr 2020 23:01:32 +0300
Thank you for your response Mark.

The issue has been cross-reported to Debian as bug #959050
<https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959050>.

Regards,
Andrey.

On Tue, 28 Apr 2020 at 15:25, Mark Hindley <mark@hindley.org.uk> wrote:
>
> Andrey,
>
> Thanks for this. None of these packages are forked in Devuan and we use Debian's
> packages directly. You would be better reporting this issue to Debian BTS.
>
> Thanks.
>
> Mark

Set bug forwarded-to-address to 'https://bugs.debian.org/959050'. Request was from Mark Hindley <mark@hindley.org.uk> to control@bugs.devuan.org. (Thu, 21 May 2020 10:33:06 GMT) (full text, mbox, link).


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