bug#68483: Qutebrowser QT platform plugin could not be initialized

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

Related to https://issues.guix.gnu.org/67289#7

Here is the qutebrowser 3 process shell output. Would anyone recommend a solution?
```
$ qutebrowser
20:40:33 WARNING: Could not find the Qt platform plugin "wayland" in ""
20:40:33 CRITICAL: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: offscreen, vnc, minimal, xcb, vkkhrdisplay, linuxfb, minimalegl, eglfs.

Fatal Python error: Aborted

Current thread 0x00007f36c07e6740 (most recent call first):
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py", line 545 in __init__
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py", line 80 in run
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/qutebrowser.py", line 231 in main
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/bin/.qutebrowser-real", line 33 in <module>

Extension modules: PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets, markupsafe._speedups, yaml._yaml, PyQt6.QtNetwork, PyQt6.QtQml, PyQt6.QtOpenGL, PyQt6.QtDBus, PyQt6.QtPrintSupport, PyQt6.QtWebChannel, PyQt6.QtWebEngineCore, PyQt6.QtWebEngineWidgets, PyQt6.QtSql (total: 14)
```

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Josselin Poiret via Bug reports for GNU Guix]

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Hi chris, 

chris <chris@bumblehead.com> writes:

> Related to https://issues.guix.gnu.org/67289#7
>
> Here is the qutebrowser 3 process shell output. Would anyone recommend a solution?
> ```
> $ qutebrowser
> 20:40:33 WARNING: Could not find the Qt platform plugin "wayland" in ""

Have you installed qt-wayland?  Are you setting QT_QPA_PLATFORM
anywhere?

Best,
-- 
Josselin Poiret

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bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

On  1月15日 月, Josselin Poiret wrote:
> Hi chris, 
> 
> chris <chris@bumblehead.com> writes:
> 
> > Related to https://issues.guix.gnu.org/67289#7
> >
> > Here is the qutebrowser 3 process shell output. Would anyone recommend a solution?
> > ```
> > $ qutebrowser
> > 20:40:33 WARNING: Could not find the Qt platform plugin "wayland" in ""
> 
> Have you installed qt-wayland?  Are you setting QT_QPA_PLATFORM
> anywhere?

Hey Josselin,

I've tried installing qtwayland through guix home by specifying "qtwayland" in my home config file. QT_QPA_PLATFORM is specified in my home config this way
```
(simple-service 'env-vars home-environment-variables-service-type
   '(("EDITOR" . "emacs")
     ("OPENER" . "sh.opener.sh")
     ("BROWSER" . "qutebrowser")
     ("GTK_IM_MODULE" . "fcitx")
     ("QT_IM_MODULE" . "fcitx")
     ("XMODIFIERS" . "@im=fcitx")
     ("QT_QPA_PLATFORM" . "wayland")
     ("QT_SCALE_FACTOR" . "1")
     ("XDG_SESSION_TYPE" . "wayland")
     ("XDG_SESSION_DESKTOP" . "sway")
     ("XDG_CURRENT_DESKTOP" . "sway")
     ("DESKTOP_SESSION" . "sway")
     ("LIBSEAT_BACKEND" . "seatd")))
```

QT_QPA_PLATFORM prints at the shell this way
```
$ echo $QT_QPA_PLATFORM
wayland
```

I tried changing "qtwayland" to "qtwayland@6.5" in my home config and reconfiguring home. I've also tried installing qtwayland without guix home using "guix install qtwayland" but those did not resolve the issue.

I can try any suggestion and if it doesn't work, revert back using guix home switch-generation

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Sergey Trofimov]

chris <chris@bumblehead.com> writes:

> On  1月15日 月, Josselin Poiret wrote:
>> Hi chris,
>>
>> chris <chris@bumblehead.com> writes:
>>
>> > Related to https://issues.guix.gnu.org/67289#7
>> >
>> > Here is the qutebrowser 3 process shell output. Would anyone recommend a solution?
>> > ```
>> > $ qutebrowser
>> > 20:40:33 WARNING: Could not find the Qt platform plugin "wayland" in ""
>>
>> Have you installed qt-wayland?  Are you setting QT_QPA_PLATFORM
>> anywhere?
>
> Hey Josselin,
>
> I've tried installing qtwayland through guix home by specifying "qtwayland" in
> my home config file. QT_QPA_PLATFORM is specified in my home config this way
>

Here you go:
```sh
qtw=$(guix build qtwayland@6)/lib/qt6/plugins
QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
```

Maybe a qutebrowser-wayland package variant should be defined to do the
required wrapping. Otherwise you can just install qtwayland@6 to your
profile and use ~/.guix-home/profile/lib/qt6/plugins in paths.

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

On  1月16日 火, Sergey Trofimov wrote:
> 
> Here you go:
> ```sh
> qtw=$(guix build qtwayland@6)/lib/qt6/plugins
> QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
> ```
> 
> Maybe a qutebrowser-wayland package variant should be defined to do the
> required wrapping. Otherwise you can just install qtwayland@6 to your
> profile and use ~/.guix-home/profile/lib/qt6/plugins in paths.

Neither approach succeeded for me. What am I doing wrong...
```sh
$ ls $qtw
platforms/                  wayland-graphics-integration-client/  wayland-shell-integration/
wayland-decoration-client/  wayland-graphics-integration-server/

$ ls $qtw/platforms
libqwayland-egl.so  libqwayland-generic.so

$ qtw=/home/bumble/.guix-home/profile/lib/qt6/plugins; QT_PLUGIN_PATH=$qtw; QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms; qutebrowser -s qt.force_platform wayland
23:00:47 WARNING: Could not find the Qt platform plugin "wayland" in ""
23:00:47 CRITICAL: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: offscreen, vnc, minimal, xcb, vkkhrdisplay, linuxfb, minimalegl, eglfs.

Fatal Python error: Aborted

Current thread 0x00007f7b99434740 (most recent call first):
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py", line 545 in __init__
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/app.py", line 80 in run
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/qutebrowser.py", line 231 in main
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/bin/.qutebrowser-real", line 33 in <module>

Extension modules: PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets, markupsafe._speedups, yaml._yaml, PyQt6.QtNetwork, PyQt6.QtQml, PyQt6.QtOpenGL, PyQt6.QtDBus, PyQt6.QtPrintSupport, PyQt6.QtWebChannel, PyQt6.QtWebEngineCore, PyQt6.QtWebEngineWidgets, PyQt6.QtSql (total: 14)
```

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

On  1月15日 月, chris wrote:
> On  1月16日 火, Sergey Trofimov wrote:
> > 
> > Here you go:
> > ```sh
> > qtw=$(guix build qtwayland@6)/lib/qt6/plugins
> > QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
> > ```

I tried this command again just now and succeeded this time. I must have done something wrong the first time.

Thank you Sergey!

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Clément Lassieur]

On Mon, Jan 15 2024, chris wrote:

> On  1月15日 月, chris wrote:
>> On  1月16日 火, Sergey Trofimov wrote:
>> > 
>> > Here you go:
>> > ```sh
>> > qtw=$(guix build qtwayland@6)/lib/qt6/plugins
>> > QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
>> > ```
>
> I tried this command again just now and succeeded this time. I must have done something wrong the first time.
>
> Thank you Sergey!

Hi,

Would this work with non-wayland users too?  (So that it would make
sense to add it to the main package?)

Thanks,
Clément

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Sergey Trofimov]

Clément Lassieur <clement@lassieur.org> writes:

> On Mon, Jan 15 2024, chris wrote:
>
>> On  1月15日 月, chris wrote:
>>> On  1月16日 火, Sergey Trofimov wrote:
>>> >
>>> > Here you go:
>>> > ```sh
>>> > qtw=$(guix build qtwayland@6)/lib/qt6/plugins
>>> > QT_PLUGIN_PATH=$qtw 
>>> > QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s 
>>> > qt.force_platform wayland
>>> > ```
>>
>> I tried this command again just now and succeeded this time. I 
>> must have done something wrong the first time.
>>
>> Thank you Sergey!
>
> Hi,
>
> Would this work with non-wayland users too?  (So that it would 
> make
> sense to add it to the main package?)
>
> Thanks,
> Clément

Yeah, it would work, but forcing the platform through parameters 
is not necessary. I added it just to be sure that wayland is being 
used instead of xcb. On the other hand I think adding qtwayland 
dependency to every qt-based gui program doesn't make sense. Maybe 
a qtwayland-home-service makes more sense which would install the 
dependency and set required environment variables. This way it 
would work for every Qt GUI program on wayland.

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Clément Lassieur]

On Tue, Jan 16 2024, Sergey Trofimov wrote:

>> Would this work with non-wayland users too?  (So that it would make
>> sense to add it to the main package?)
>>
>> Thanks,
>> Clément
>
> Yeah, it would work, but forcing the platform through parameters is not
> necessary. I added it just to be sure that wayland is being used instead of
> xcb. On the other hand I think adding qtwayland dependency to every qt-based
> gui program doesn't make sense. Maybe a qtwayland-home-service makes more
> sense which would install the dependency and set required environment
> variables. This way it would work for every Qt GUI program on wayland.

Ok, I see, thanks!

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Sergey Trofimov]

Clément Lassieur <clement@lassieur.org> writes:

> On Tue, Jan 16 2024, Sergey Trofimov wrote:
>
>>> Would this work with non-wayland users too?  (So that it would 
>>> make
>>> sense to add it to the main package?)
>>>
>>> Thanks,
>>> Clément
>>
>> Yeah, it would work, but forcing the platform through 
>> parameters is not
>> necessary. I added it just to be sure that wayland is being 
>> used instead of
>> xcb. On the other hand I think adding qtwayland dependency to 
>> every qt-based
>> gui program doesn't make sense. Maybe a qtwayland-home-service 
>> makes more
>> sense which would install the dependency and set required 
>> environment
>> variables. This way it would work for every Qt GUI program on 
>> wayland.
>
> Ok, I see, thanks!

As simple as:

--8<---------------cut here---------------start------------->8---
(simple-service 'qtwayland-vars-service
  home-environment-variables-service-type
   `(("QT_PLUGIN_PATH" . ,(file-append qtwayland 
   "/lib/qt6/plugins"))
     ("QT_QPA_PLATFORM_PLUGIN_PATH" . ,(file-append qtwayland 
     "/lib/qt6/plugins/platforms"))))
--8<---------------cut here---------------end--------------->8---

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

On  1月16日 火, Sergey Trofimov wrote:
> 
> Clément Lassieur <clement@lassieur.org> writes:
> 
> --8<---------------cut here---------------start------------->8---
> (simple-service 'qtwayland-vars-service
>  home-environment-variables-service-type
>   `(("QT_PLUGIN_PATH" . ,(file-append qtwayland   "/lib/qt6/plugins"))
>     ("QT_QPA_PLATFORM_PLUGIN_PATH" . ,(file-append qtwayland
> "/lib/qt6/plugins/platforms"))))
> --8<---------------cut here---------------end--------------->8---

This works here. After adding the above to my home config, qutebrowser starts as `qutebrowser` without the extra params.

As for the sound issue, this system uses pipewire only, without dbus. mpv, musikcube and the previous version of qutebrowser have/had sound. When I first setup guix about a year ago, qutebrowser 2 did not produce sound and, to resolve the issue, Iyzsong, in the matrix or irc channel, said they would enable native support for pipewire through a flag at qutebrowser (or maybe one of the dependencies... I don't remember) and the next day after pull and reconfigure the sound began working and there were no sound problems until updating to qutebrowser 3 today.

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

The snippet should be attributed to Sergey, my apology for incorrectly editing the reply

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

I'm not sure what the correct protocol or etiquette is but I think this issue could be closed by sending an email to 68483-done@debbugs.gnu.org

Maybe the 'done' email should be sent from Sergey who provided the solution?

I would like to close this issue and open new separate issues for sound and the PermissionError shown in the process output around 'qtwebengine_devtools_resources.pak'

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

Hey everyone the close email is sent and two separate issues opened, linked below,
 * https://issues.guix.gnu.org/68512 Qutebrowser 3, no sound from pipewire-only system,
 * https://issues.guix.gnu.org/68513 Qutebrowser 3, PermissionError qtwebengine_devtools_resources.pak

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

On  1月15日 月, chris wrote:
> On  1月16日 火, Sergey Trofimov wrote:
> > 
> > Here you go:
> > ```sh
> > qtw=$(guix build qtwayland@6)/lib/qt6/plugins
> > QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
> > ```
> >

I think it needed the extra slash after at the end of $qtw... the shell output looks problematic, but otherwise the browser has started. Thank you

```
$ qtw=$(guix build qtwayland@6)/lib/qt6/plugins; QT_PLUGIN_PATH=$qtw/; QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms; qutebrowser -s qt.force_platform wayland
23:47:07 ERROR: Failed to copy webengine resources, not applying quirk
Traceback (most recent call last):
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py", line 253, in patch_webengine
    webengine_resources_path = copy_webengine_resources()
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py", line 197, in copy_webengine_resources
    shutil.rmtree(work_dir)
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 724, in rmtree
    _rmtree_safe_fd(fd, path, onerror)
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 680, in _rmtree_safe_fd
    onerror(os.unlink, fullname, sys.exc_info())
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 678, in _rmtree_safe_fd
    os.unlink(entry.name, dir_fd=topfd)
PermissionError: [Errno 13] 許可がありません: 'qtwebengine_devtools_resources.pak'
23:47:08 INFO: Showing changelog after upgrade to qutebrowser v3.1.0.
```

bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris]

Qutebrowser 3 does not have sound and this appears in the process output. "そのようなファイルやディレクトリはありません" means "the file or directory is not found".
```
[3158:3158:0116/000131.568005:ERROR:interface_endpoint_client.cc(694)] Message 4 rejected by interface blink.mojom.WidgetHost
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000734.652713:ERROR:alsa_util.cc(204)] PcmOpen: default,そのようなファイルやディレクトリはありません
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000734.653460:ERROR:alsa_util.cc(204)] PcmOpen: plug:default,そのようなファイルやディレクトリはありません
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000824.855365:ERROR:alsa_util.cc(204)] PcmOpen: default,そのようなファイルやディレクトリはありません
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000824.856521:ERROR:alsa_util.cc(204)] PcmOpen: plug:default,そのようなファイルやディレクトリはありません
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000826.415347:ERROR:alsa_util.cc(204)] PcmOpen: default,そのようなファイルやディレクトリはありません
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
[3473:3473:0116/000826.416368:ERROR:alsa_util.cc(204)] PcmOpen: plug:default,そのようなファイルやディレクトリはありません
```

bug#68483: Qutebrowser QT platform plugin could not be initialized

[Sergey Trofimov]

chris <chris@bumblehead.com> writes:

> Qutebrowser 3 does not have sound and this appears in the 
> process output. "その
> ようなファイルやディレクトリはありません" means "the file or 
> directory is not
> found".
> ```
> [3158:3158:0116/000131.568005:ERROR:interface_endpoint_client.cc(694)] 
> Message 4 rejected by interface blink.mojom.WidgetHost
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000734.652713:ERROR:alsa_util.cc(204)] PcmOpen: 
> default,そのようなファイルやディレクトリはありません
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000734.653460:ERROR:alsa_util.cc(204)] PcmOpen: 
> plug:default,そのようなファイルやディレクトリはありません
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000824.855365:ERROR:alsa_util.cc(204)] PcmOpen: 
> default,そのようなファイルやディレクトリはありません
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000824.856521:ERROR:alsa_util.cc(204)] PcmOpen: 
> plug:default,そのようなファイルやディレクトリはありません
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000826.415347:ERROR:alsa_util.cc(204)] PcmOpen: 
> default,そのようなファイルやディレクトリはありません
> ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open 
> slave
> [3473:3473:0116/000826.416368:ERROR:alsa_util.cc(204)] PcmOpen: 
> plug:default,そのようなファイルやディレクトリはありません
> ```

Sound works for me both in X11 and Wayland environments. I use 
pipewire though.

bug#68483: closing

[chris]

closing