@lkroll Thanks a lot for your script, works like a charm !
As I said to @lduboeuf , I was wondering if it could be possible to add some exceptions ?
For instance, 4G could be maintained when the device is charging, or when hotspot activated, or even when an specific app is running (Futify for me).

@AppLee in fact there is no jack plug on the FP4 (only usb C). So all my tests are made from a docking station

@lduboeuf perfect ! for the moment works like a charm !! Thanks a lot !!

edit : it works but take a very long time !!
Could it be improved ? (was instantly on 20.04)

@Bolly yes thanks ! This exactly what I did, and it worked
I've tried to install ffmpeg on UT to be 'autonomous' with snap but didn't worked

@AppLee FP4 and French. I didn't had any connectivity issues since 1y+ but I am not with Free but with RED (SFR).

@brenno.almeida welcome

@brenno.almeida sure.
I've registered in web browser where I got an error. I cannot explain why I was redirected to a 127.0.0.1 page.
I don't know if it granted access but when I try to launch futify app it crashes instantly with theses logs.
(app unconfined of course)

[07/05/2026 09:58] Env $XDG_CACHE_HOME set use it = /home/phablet/.cache/futify.brennoflavio
[07/05/2026 09:58] Env $XDG_CONFIG_HOME no set use default = /home/phablet/.config/futify.brennoflavio/
[07/05/2026 09:58] library "eglSubDriverAndroid.so" not found
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: Creating a QMirClientScreen now
[07/05/2026 09:58] before create context
[07/05/2026 09:58] before set spotSession
[07/05/2026 09:58] before create window
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: error calling result "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.857\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"com.lomiri.libertine.Service.Operations\" member=\"list\" error name=\"(unset)\" requested_reply=\"0\" destination=\"com.lomiri.libertine.Service\" (uid=32011 pid=4872 comm=\"/usr/bin/python3 /usr/bin/libertined\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: error calling result "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.857\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"com.lomiri.libertine.Service.OperationsMonitor\" member=\"running\" error name=\"(unset)\" requested_reply=\"0\" destination=\"com.lomiri.libertine.Service\" (uid=32011 pid=4872 comm=\"/usr/bin/python3 /usr/bin/libertined\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: lastError - no arguments?
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: error calling result "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.857\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"com.lomiri.libertine.Service.OperationsMonitor\" member=\"last_error\" error name=\"(unset)\" requested_reply=\"0\" destination=\"com.lomiri.libertine.Service\" (uid=32011 pid=4872 comm=\"/usr/bin/python3 /usr/bin/libertined\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: lastError - no arguments?
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: error calling result "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.857\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"com.lomiri.libertine.Service.OperationsMonitor\" member=\"result\" error name=\"(unset)\" requested_reply=\"0\" destination=\"com.lomiri.libertine.Service\" (uid=32011 pid=4872 comm=\"/usr/bin/python3 /usr/bin/libertined\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: lastError - no arguments?
[07/05/2026 09:58] 2026/05/07 09:58:19 .:0: virtual QMediaService* AalServicePlugin::create(const QString&) "org.qt-project.qt.mediaplayer"
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: Using Hybris video sink
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual QMediaPlayer::State AalMediaPlayerControl::state() const
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual QMediaPlayer::MediaStatus AalMediaPlayerControl::mediaStatus() const
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: propsReply "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.727\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"org.freedesktop.DBus.Properties\" member=\"GetAll\" error name=\"(unset)\" requested_reply=\"0\" destination=\"org.freedesktop.NetworkManager\" (uid=0 pid=2004 comm=\"/usr/sbin/NetworkManager --no-daemon\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: nmReply "An AppArmor policy prevents this sender from sending this message to this recipient; type=\"method_call\", sender=\":1.727\" (uid=32011 pid=631010 comm=\"futify\" label=\"futify.brennoflavio_futify_1.6.3 (enforce)\") interface=\"org.freedesktop.NetworkManager\" member=\"GetDevices\" error name=\"(unset)\" requested_reply=\"0\" destination=\"org.freedesktop.NetworkManager\" (uid=0 pid=2004 comm=\"/usr/sbin/NetworkManager --no-daemon\" label=\"unconfined\")"
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: "Object path cannot be empty"
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual void AalMediaPlayerControl::stop()
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: void AalMediaPlaylistProvider::disconnect_signals()
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: void AalMediaPlaylistProvider::connect_signals()
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: Track list doesn't exist so can't clear it!
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual void AalMediaPlaylistControl::setPlaybackMode(QMediaPlaylist::PlaybackMode)
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: PlaybackMode: Sequential
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual void AalMediaPlaylistControl::setCurrentIndex(int)
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: position:  -1 , mediaCount:  0
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual void AalMediaPlayerControl::setMedia(const QMediaContent&, QIODevice*)
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: setMedia() media:  QUrl("")
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: setMedia() headers empty:  true
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: Same media as current
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: virtual void AalMediaPlayerControl::play()
[07/05/2026 09:58] 2026/05/07 09:58:20 .:0: void AalMediaPlayerService::play()
[07/05/2026 09:58] 2026/05/07 09:58:20 Player.qml:30: player state changed 1
[07/05/2026 09:58] 2026/05/07 09:58:20 PlayerView.qml:18: file:////opt/click.ubuntu.com/futify.brennoflavio/1.6.3/qml/components/PlayerView.qml:18:5: QML QQuickItem: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
[07/05/2026 09:58] 2026/05/07 09:58:20 Settings.qml:15: OnComplete 945
[07/05/2026 09:58] 2026/05/07 09:58:20 Main.qml.:365: OnComplete
[07/05/2026 09:58] Playlists don't exsit UserPlaylists
[07/05/2026 09:58] 2026/05/07 09:58:21 couldn't get UserTracks: spotify: couldn't decode error: (119) [The user is not registered for this application. Please check your settings on https://developer.spotify.com/dashboard.]

Then I got to this web page developer.spotify.com and I was well connected

@brenno.almeida same here

@DJac I also wrote to them today

edit : it works but take a very long time !!
Could it be improved ? (was instantly on 20.04)

Hello,
on my FP4, on 24.04-1.0 once I have disabled internet connection (or battery saver app did) I must reboot to get back an internet connection.

Indeed, when toggling data on after having it off, I get the LTE sign on notification menu opened, but on the upper notification bar it is still the wifi empty icon, but most important : internet is unreachable.

Thanks !!

@lduboeuf perfect ! for the moment works like a charm !! Thanks a lot !!

Hello @lduboeuf , I just installed 24.04 after wiping all data.
When I launch your battery saver it closes right away with this log :

[02/10/2025 15:48] library "eglSubDriverAndroid.so" not found
[02/10/2025 15:48] Creating a QMirClientScreen now
[02/10/2025 15:48] file:///opt/click.ubuntu.com/batterysaver.lduboeuf/1.8.0/qml/Main.qml:25 module "MeeGo.QOfono" is not installed

Thanks for your help

@RJDan Is there a way to give to the app the impression this is a regular android device ?

I don't have any clue where to search but if it can help I paste you below the logs from console (when I execute the piece of code mentionned above) because it is different from what is written into uwofl.log output file.

/opt/click.ubuntu.com/uwolf.chromiumos-guy/0.10.30/bin/browser/defaults/preferences/custom-prefs.js:99: prefs parse error: unexpected character
[Parent 7025, Main Thread] WARNING: libmaliit-glib.so.0: cannot open shared object file: No such file or directory: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:55.615: libmaliit-glib.so.0: cannot open shared object file: No such file or directory
[Parent 7025, Main Thread] WARNING: Loading IM context type 'Maliit' failed: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:55.615: Loading IM context type 'Maliit' failed
[Parent 7025, Main Thread] WARNING: libmaliit-glib.so.0: cannot open shared object file: No such file or directory: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201                           
                                                 
(librewolf:7025): Gtk-WARNING **: 11:50:55.733: libmaliit-glib.so.0: cannot open shared object file: No such file or directory                     
[Parent 7025, Main Thread] WARNING: Loading IM context type 'Maliit' failed: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201                 
                                                 
(librewolf:7025): Gtk-WARNING **: 11:50:55.733: Loading IM context type 'Maliit' failed           
[Parent 7025, Main Thread] WARNING: libmaliit-glib.so.0: cannot open shared object file: No such file or directory: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:56.124: libmaliit-glib.so.0: cannot open shared object file: No such file or directory
[Parent 7025, Main Thread] WARNING: Loading IM context type 'Maliit' failed: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:56.124: Loading IM context type 'Maliit' failed
[Parent 7025, Main Thread] WARNING: libmaliit-glib.so.0: cannot open shared object file: No such file or directory: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:56.124: libmaliit-glib.so.0: cannot open shared object file: No such file or directory
[Parent 7025, Main Thread] WARNING: Loading IM context type 'Maliit' failed: 'glib warning', file /root/.local/share/bsys6/work/librewolf-141.0-1/toolkit/xre/nsSigHandlers.cpp:201

(librewolf:7025): Gtk-WARNING **: 11:50:56.124: Loading IM context type 'Maliit' failed
[7025] Sandbox: Couldn't open video device /dev/video
[7025] Sandbox: Couldn't open video device /dev/video1
[7025] Sandbox: Couldn't open video device /dev/video0

[1]+  Stopped                 ./librewolf.sh >> ~/uwolf.log