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[SOLVED] kwin_screencast: Failed to connect PipeWire context
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sigra
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Joined: 03 Feb 2006
Posts: 137

PostPosted: Sat Sep 14, 2024 7:14 pm    Post subject: [SOLVED] kwin_screencast: Failed to connect PipeWire context Reply with quote

Trying to get KDE6 working. The first thing to fix is obviously what spews enless lines of text to the log. Here is the last half minute:
Code:
sep 14 21:06:00 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:00 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:00 tor plasmashell[606]: error creating screencast "Misslyckades ansluta PipeWire-sammanhang"
sep 14 21:06:00 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:00 tor plasmashell[606]: error creating screencast "Misslyckades ansluta PipeWire-sammanhang"
sep 14 21:06:01 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:01 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:01 tor plasmashell[606]: error creating screencast "Misslyckades ansluta PipeWire-sammanhang"
sep 14 21:06:01 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:01 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:01 tor plasmashell[606]: error creating screencast "Misslyckades ansluta PipeWire-sammanhang"
sep 14 21:06:01 tor kwin_wayland_wrapper[512]: kwin_screencast: Failed to connect PipeWire context
sep 14 21:06:01 tor plasmashell[606]: error creating screencast "Misslyckades ansluta PipeWire-sammanhang"
sep 14 21:06:03 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:03 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.
sep 14 21:06:08 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:08 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.
sep 14 21:06:13 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:13 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.
sep 14 21:06:18 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:18 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.
sep 14 21:06:23 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:23 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.
sep 14 21:06:28 tor plasmashell[606]: kpipewire_logging: error: "Misslyckades ansluta till PipeWire-sammanhang" 0
sep 14 21:06:28 tor plasmashell[606]: received error while creating the stream "Misslyckades ansluta till PipeWire-sammanhang" Media monitor will not work.


Last edited by sigra on Sun Sep 15, 2024 10:44 am; edited 1 time in total
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sigra
Tux's lil' helper
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Joined: 03 Feb 2006
Posts: 137

PostPosted: Sun Sep 15, 2024 9:02 am    Post subject: Reply with quote

The error message does not say how it tried to connect PipeWire. The following command did not work:
Code:
systemctl start PipeWire

emerge -s pipewire shows that acct-group/pipewire-0-r2, kde-plasma/kpipewire-6.1.4-r1 and media-video/pipewire-1.2.3 are installed. But it also shows that acct-user/pipewire is not installed. Should it be installed, and if so, why was it not installed as a dependency?

Searching for pipewire in systemsettings does not find anything (such as an option to disable it).
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sigra
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Joined: 03 Feb 2006
Posts: 137

PostPosted: Sun Sep 15, 2024 9:26 am    Post subject: Reply with quote

Quote:
[ebuild R ~] media-video/pipewire-1.2.3:0/0.4::gentoo USE="X dbus doc extra ffmpeg readline ssl systemd v4l zeroconf -bluetooth -echo-cancel -flatpak -gsettings -gstreamer -ieee1394 -jack-client -jack-sdk -liblc3 -lv2 -man -modemmanager -pipewire-alsa -roc (-selinux) -sound-server (-system-service) -test" 0 KiB

Should the use flag system-service be enabled? If so, why was it not enabled as a dependency of plasmashell?
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sigra
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Posts: 137

PostPosted: Sun Sep 15, 2024 10:24 am    Post subject: Reply with quote

While emerging pipewire separately, I noticed this message:
Code:
>>> Completed (1 of 1) media-video/pipewire-1.2.3::gentoo

 * Messages for package media-video/pipewire-1.2.3:

 * Please restart KWin/Mutter after upgrading PipeWire.
 * Screencasting may not work until you do.
 *
 * When switching from PulseAudio, you may need to disable PulseAudio:
 *
 *   systemctl --user disable pulseaudio.service pulseaudio.socket
 *
 * To use PipeWire, the user units must be manually enabled
 * by running this command as each user you use for desktop activities:
 *
 *   systemctl --user enable pipewire.socket pipewire-pulse.socket
 *
 * A reboot is recommended to avoid interferences from still running
 * PulseAudio daemon.
 *
 * Both new users and those upgrading need to enable WirePlumber
 * for relevant users:
 *
 *   systemctl --user disable pipewire-media-session.service
 *   systemctl --user --force enable wireplumber.service
 *
 * Root user may replace --user with --global to change system default
 * configuration for all of the above commands.
 *
 * For latest tips and tricks, troubleshooting information, and documentation
 * in general, please refer to https://wiki.gentoo.org/wiki/PipeWire
 *
 * The following can be installed for optional runtime features:
 *   sys-auth/rtkit for restricted realtime capabilities via D-Bus
 *   media-plugins/alsa-plugins[pulseaudio] for ALSA plugin to use PulseAudio interface for output

 * GNU info directory index is up-to-date.


I also read at https://wiki.gentoo.org/wiki/PipeWire about CONFIG_VERBOSE_PROCFS. But in my kernels, it is called SND_VERBOSE_PROCFS. I enable it, reinstall the kernel, run the systemctl commands suggested above and reboot now.
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sigra
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Posts: 137

PostPosted: Sun Sep 15, 2024 10:43 am    Post subject: [SOLVED] kwin_screencast: Failed to connect PipeWire context Reply with quote

No more log spam after reboot (tried both 6.1.110-gentoo and 6.6.47-gentoo)!
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pietinger
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PostPosted: Sun Sep 15, 2024 11:08 am    Post subject: Reply with quote

sigra wrote:
[...] I also read at https://wiki.gentoo.org/wiki/PipeWire about CONFIG_VERBOSE_PROCFS. But in my kernels, it is called SND_VERBOSE_PROCFS. [...]

I have just corrected it in this wiki article.
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