Best posts made by lkroll

lkroll

Battery drain on standby with 4G is still a problem on focal, so I updated the script and created a small systemd service to automatically run the script at startup. Maybe this will be useful for some.

The greeter in focal is called "com.lomiri.LomiriGreeter" instead of "com.canonical.UnityGreeter". So i changed that in the script and tested that it indeed still works.

I placed the updated script in:
/home/phablet/.local/bin

#!/bin/bash

primary_preference="lte"
saving_preference="gsm"
sim_slot="/ril_0"

interface=org.freedesktop.DBus.Properties
member=PropertiesChanged

dbus-monitor --session "type=signal,interface='${interface}',member='${member}'" |
while read -r line; do
        if [[ ${line} == *"com.lomiri.LomiriGreeter"* ]]; then
                read; read; read -r line
                if [[ ${line} == *"IsActive"* ]]; then
                        read -r line
                        [[ ${line} == *"true"* ]] && /usr/share/ofono/scripts/set-tech-preference "${sim_slot}" "${saving_preference}" 1>/dev/null
                        [[ ${line} == *"false"* ]] && /usr/share/ofono/scripts/set-tech-preference "${sim_slot}" "${primary_preference}" 1>/dev/null
                fi
        fi
done

Don't forget to make it executable:

chmod u+x /home/phablet/.local/bin/lte-battery-saver.sh

Ubuntu 20.04 uses systemd instead of upstart so I created a systemd user service in:
/home/phablet/.config/systemd/user/lte-battery-saver.service

[Unit]
Description=LTE battery saver
Requires=dbus.socket
After=dbus.socket

[Service]
ExecStart=/home/phablet/.local/bin/lte-battery-saver.sh

[Install]
WantedBy=dbus.socket

Now to enable the service:

systemctl --user enable --now lte-battery-saver

Verify that it is running and up:

systemctl --user status lte-battery-saver

It should return active and enabled:

● lte-battery-saver.service - LTE battery saver
     Loaded: loaded (/home/phablet/.config/systemd/user/lte-battery-saver.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2023-04-29 18:44:27 CEST; 1h 11min ago

That's it, now everytime the phone is locked the connection will drop to 2G and back to 4G/LTE once unlocked.
I tested and verified it on my Oneplus 5T, but it should work on other devices running focal.

lkroll

@lduboeuf That does work, thanks for the tip.

I totally overlooked the cmake builder in the clickable docs but now it makes sense. I just added an extra step to use the right binary before building, but now I can specify for what architecture I want to build the click

lkroll

@AmauryDBZ I just put the command into a systemd service file under /home/phablet/.config/systemd/user/enable-doubletap.service

[Unit]
Description=Enable Double Tap to Wake on Unity Screen after D-Bus is ready
Requires=dbus.socket
After=dbus.socket

[Service]
ExecStart=dbus-send --system --print-reply --dest=com.canonical.Unity.Screen /com/canonical/Unity/Screen com.canonical.Unity.Screen.setDoubleTapToWakeEnabled boolean:true
Type=oneshot
RemainAfterExit=yes

[Install]
WantedBy=dbus.socket

After that enable with systemctl --user enable enable-doubletap.service

lkroll

As long as it is still in the works, you could use Cinny or Element to access a matrix server that uses the signal bridge. That way you even get push notifications and combine multiple messengers into one app. I set up my own matrix server to use the whatsapp bridge, but it also work with Signal. If you do not want to self host I can recommend https://tchncs.de/matrix, which has the signal bridge already set up and instructions on their site on how to use it.

lkroll

@TheBird Not really. There are a couple guides online about setting up the bridge if you host your own Matrix server, but if you just want to use it you can join a server that already has the bridge set up and ready to go.

I wrote an example in this topic a while ago: https://forums.ubports.com/topic/8983/signal-axolotl-status-in-2023?_=1700762725683
I then use Fluffychat built for Focal as my Matrix client, as it has been the most reliable for notifications.

It is not that hard to do and a really good stop gap solution. Plus you can also bundle Whatsapp and more all in one platform.

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