@aceclan I haven't tried the ubport recovery yet. The TWRP recovery works

@Danct12
Sorry, I meant the udev rules for santoni in "/usr/lib/lxc-android-config/"

sudo mount -o remount,rw /
sudo -i # And enter your password
cat /var/lib/lxc/android/rootfs/ueventd*.rc|grep ^/dev|sed -e 's/^\/dev\///'|awk '{printf "ACTION==\"add\", KERNEL==\"%s\", OWNER=\"%s\", GROUP=\"%s\", MODE=\"%s\"\n",$1,$3,$4,$2}' | sed -e 's/\r//' >/usr/lib/lxc-android-config/70-santoni.rules

Hi @Danct12
I finally got a liltle time to test GPS on the latest build (17. Jan 2020) and it is working (at least with unav).
I have performed the following steps

• Boot in fastboot mode and flash the halium-boot image

• Boot to recovery and wipe Dalvik/ART Cache, System, Vendor, Data, Cache

• While in recovery, install the rootfs and system image

• Reboot to Ubuntu touch and apply the rules for lxc-android-config

• Reboot to ubuntu, download and install unav from Openstore

• Unav asks permission for location on first start, accept it

• Search a destination in unav and press navigate.

• Unav says "Waiting for GPS signal ..." and after a short time (2~5 minutes), my position was found and I was able to navigate to the destination.

@ComLarsic I'm sorry I wasn't clear enough
I was asking a way to add the results of these commands in the system.img.
I thought it would be possible (and I think it is possible) to generate udev rules on the first installation and then copy the file somewhere in the build directory and integrate it into the build system so that it ends up in the system.img file.
So no need to execute these commands after every flash.

I assume that the rules for other devices found in /usr/lib/lxc-android-config/ come from the xenial rootfs.

@Flohack can you post here (ideally in the porting documentation) how to add udev rules and other configs in the system.img? I also need that for Redmi 4x (santoni).

Hi Ubports comunity

Danct12 and Asriel have make and excellent job on porting Ubuntu touch (Ubports) on Xiaomi Redmi 4x (Santoni).
Unfortunately, they can no longer do anything at the moment.
A big thank to both of them. Their work are available at https://github.com/ubports-santoni.

The features available are:

• Kernel 3.18.140 with apparmor v3 patch applied.
• Mobile Data (4G)
• SMS (send and receive) with notification in the menu
• Incoming and Outgoing call process normally, but no audio at all and no ringtone (only vibration on incoming call)
• Bluethooth
• GPS
• Front and rear camera take pictures, but hang on recording video.
• Led charging indicator

Not working:

• Fingerprint
• Automatic screen rotation. (maybe I broke it)
• Playing video file with the "Media Player"

What I've done so far (I haven't committed the changes yet):

• Fix the audio issues during call. So Incoming and Outgoing call now work properly.
• Change API of the camera to 64 bit. This reduce latency time when taking picture.

The next thing an want to fix is ringtone on incoming call, but I am blocked on following issues:
The kernel is compiled with CONFIG_SECURITY_APPARMOR=y and CONFIG_DEFAULT_SECURITY_APPARMOR=y

a) If apparmor=0 is set in the kernel boot parameter, all the above listed features work including all apps.
Ringtone on incoming call will not work.

b) If apparmor=1 is set or simply removed, all the above listed features work including ringtone.
But but but, only a few apps will start run properly: System Settings, Phone, Contacts, Openstore, Terminal and File Manager.
The most apps like Morph Browser, Camera, Messaging, Gallery etc... will not start. They are all killed by Apparmor with the following error messages such as (example of Morph Browser):

Dec 29 17:03:11 ubuntu-phablet kernel: [  666.130118] audit_printk_skb: 438 callbacks suppressed
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.130135] audit: type=1400 audit(1577635391.080:22874): apparmor="DENIED" operation="sendmsg" profile="morph-browser" name="/socket/logdw" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=1036
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.130286] audit: type=1400 audit(1577635391.080:22875): apparmor="DENIED" operation="open" profile="morph-browser" name="/dev/pmsg0" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=0
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.130897] audit: type=1400 audit(1577635391.080:22876): apparmor="DENIED" operation="sendmsg" profile="morph-browser" name="/socket/logdw" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=1036
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.130987] audit: type=1400 audit(1577635391.080:22877): apparmor="DENIED" operation="open" profile="morph-browser" name="/dev/pmsg0" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=0
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.153658] audit: type=1400 audit(1577635391.100:22878): apparmor="DENIED" operation="sendmsg" profile="morph-browser" name="/socket/logdw" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=1036
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.153767] audit: type=1400 audit(1577635391.100:22879): apparmor="DENIED" operation="open" profile="morph-browser" name="/dev/pmsg0" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=0
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.154006] audit: type=1400 audit(1577635391.100:22880): apparmor="DENIED" operation="open" profile="morph-browser" name="/sys/devices/soc0/soc_id" pid=7491 comm="morph-browser" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.169794] audit: type=1400 audit(1577635391.110:22882): apparmor="DENIED" operation="open" profile="morph-browser" name="/sys/devices/soc0/soc_id" pid=7491 comm="morph-browser" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
Dec 29 17:03:11 ubuntu-phablet kernel: [  666.178765] audit: type=1400 audit(1577635391.120:22883): apparmor="DENIED" operation="sendmsg" profile="morph-browser" name="/socket/logdw" pid=7491 comm="morph-browser" requested_mask="w" denied_mask="w" fsuid=32011 ouid=1036
Dec 29 17:03:12 ubuntu-phablet dbus[2505]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/com/canonical/libertine/Service/Operations" interface="com.canonical.libertine.Service.Operations" member="list" mask="send" name="com.canonical.libertine.Service" pid=7491 label="morph-browser" peer_pid=4506 peer_label="unconfined"
Dec 29 17:03:12 ubuntu-phablet dbus[2505]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/com/canonical/libertine/Service/OperationsMonitor" interface="com.canonical.libertine.Service.OperationsMonitor" member="running" mask="send" name="com.canonical.libertine.Service" pid=7491 label="morph-browser" peer_pid=4506 peer_label="unconfined"
Dec 29 17:03:12 ubuntu-phablet dbus[2505]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/com/canonical/libertine/Service/OperationsMonitor" interface="com.canonical.libertine.Service.OperationsMonitor" member="last_error" mask="send" name="com.canonical.libertine.Service" pid=7491 label="morph-browser" peer_pid=4506 peer_label="unconfined"
Dec 29 17:03:12 ubuntu-phablet dbus[2505]: apparmor="DENIED" operation="dbus_method_call"  bus="session" path="/com/canonical/libertine/Service/OperationsMonitor" interface="com.canonical.libertine.Service.OperationsMonitor" member="result" mask="send" name="com.canonical.libertine.Service" pid=7491 label="morph-browser" peer_pid=4506 peer_label="unconfined"
Dec 29 17:03:13 ubuntu-phablet kernel: [  668.111851] ether_ioctl: [rndis0] error: ioctl called for unsupported cmd[35585]

My questions:

1. Is Apparmor still working properly if apparmor=0 is set in the kernel boot parameter ?
2. In case of b) Do I need additional configuration in order for apparmor to work properly?