Fixed with

sudo mount -o remount,rw /
sudo nano /opt/halium-overlay/usr/libexec/lxc-android-config/device-hacks 

Add

# disable lmk
echo "0,0,0,0,0,0" | tee /sys/module/lowmemorykiller/parameters/minfree
echo 0 | tee /sys/module/lowmemorykiller/parameters/enable_adaptive_lmk

zram0 not created :

phablet@ubuntu-phablet:~$ ls /dev/block/zram0 -al
ls: cannot access '/dev/block/zram0': No such file or directory

Add 99-zram.rules :

phablet@ubuntu-phablet:~$ cat /etc/udev/rules.d/99-zram.rules
ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="zram[0-9]", SYMLINK+="block/%k"

reboot

phablet@ubuntu-phablet:~$ sudo ls /dev/block/zram0 -al
lrwxrwxrwx 1 root root 8 sept. 30 15:28 /dev/block/zram0 -> ../zram0

After this fix I don't have any lowmemorykiller. And I don't lost any notification.
Thanks to @Eric-H

@Vlad-Nirky
Before crash I've some apparmor="DENIED"

[   95.849652] aw8624_interrupt_clear enter
[   95.850689] aw8624_interrupt_clear enter
[   95.862191] aw8624_vibrator_timer_func enter
[   96.219726] kauditd_printk_skb: 16 callbacks suppressed
[   96.219734] audit: type=1400 audit(1758448270.789:307): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/devices/system/cpu/present" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.220152] audit: type=1400 audit(1758448270.789:308): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/devices/system/cpu/cpu0/cpu_capacity" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.220392] audit: type=1400 audit(1758448270.789:309): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.415512] audit: type=1400 audit(1758448270.989:310): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/module/apparmor/parameters/enabled" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.415811] audit: type=1400 audit(1758448270.989:311): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/module/apparmor/parameters/enabled" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.416121] audit: type=1400 audit(1758448270.989:312): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/module/apparmor/parameters/enabled" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.700284] audit: type=1400 audit(1758448271.269:313): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/etc/ubuntu-touch-session.d/android.conf" pid=5096 comm=52504320546872656164 requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   96.729051] audit: type=1400 audit(1758448271.299:314): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/proc/5096/loginuid" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=32011
[   97.108067] audit: type=1400 audit(1758448271.679:315): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/sys/devices/system/cpu/cpu0/regs/identification/midr_el1" pid=5096 comm="webapp-containe" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[   97.112877] audit: type=1400 audit(1758448271.679:316): apparmor="DENIED" operation="open" profile="myutforum.josele13_myutforum_1.3" name="/proc/sys/fs/inotify/max_user_watches" pid=5096 comm="ThreadPoolForeg" requested_mask="r" denied_mask="r" fsuid=32011 ouid=0
[  111.107852] rmt_storage:INFO:rmt_storage_rw_iovec_cb: Write iovec request (req_h 0xf wr_count 8) received for /boot/modem_fs1
[  111.109749] rmt_storage:INFO:rmt_storage_client_thread: Calling Write [offset=0, size=2097152, req_h 0xf, wr_count 8] for /boot/modem_fs1!
[  111.208453] rmt_storage:INFO:rmt_storage_client_thread: Done Write (bytes = 2097152, req_h 0xf, wr_count 8) for /boot/modem_fs1!
[  162.462644] aw8624_interrupt_clear enter
[  162.463908] aw8624_interrupt_clear enter
[  162.468267] aw8624_interrupt_clear enter
[  162.469267] aw8624_interrupt_clear enter
[  162.480232] aw8624_vibrator_timer_func enter
[  164.144064] lowmemorykiller: Killing 'lomiri-push-ser' (4976) (tgid 4976), adj 200,
               to free 261468kB on behalf of 'kswapd0' (147) because
               cache 1278744kB is below limit 154832kB for oom score 12
               Free memory is -9504kB above reserved.
               Free CMA is 0kB
               Total reserve is 19248kB
               Total free pages is 15348kB
               Total file cache is 1298440kB
               GFP mask is 0x14000c0
[  164.167624] lowmemorykiller: Killing 'webapp-containe' (5096) (tgid 5096), adj 200,
               to free 190280kB on behalf of 'kswapd0' (147) because
               cache 1278016kB is below limit 154832kB for oom score 12
               Free memory is 222056kB above reserved.
               Free CMA is 668kB
               Total reserve is 19248kB
               Total free pages is 291316kB
               Total file cache is 1297692kB
               GFP mask is 0x14000c0
[  164.191854] oom_reaper: reaped process 4976 (lomiri-push-ser), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
[  164.226120] oom_reaper: reaped process 5096 (webapp-containe), now anon-rss:0kB, file-rss:10540kB, shmem-rss:748kB
[  166.845681] aw8624_interrupt_clear enter
[  166.848735] aw8624_interrupt_clear enter
[  166.859490] aw8624_interrupt_clear enter
[  166.860023] aw8624_vibrator_timer_func enter

@Vlad-Nirky
I've already clear cache and that don't help. Waydroid seems never kill and more stable that native applications.
Perhaps lowmemorykiller is too much aggressive

Hello
I've got a lot of crash since updated to 24.04

[ 1004.282843] lowmemorykiller: Killing 'saliksik-app' (5476) (tgid 5476), adj 200,
               to free 186396kB on behalf of 'kswapd0' (146) because
               cache 1629624kB is below limit 154832kB for oom score 12
               Free memory is -10084kB above reserved.
               Free CMA is 0kB
               Total reserve is 19248kB
               Total free pages is 16320kB
               Total file cache is 1646292kB
               GFP mask is 0x14000c0
[ 1004.324236] oom_reaper: reaped process 5476 (saliksik-app), now anon-rss:0kB, file-rss:8148kB, shmem-rss:160kB
[ 1005.276695] lowmemorykiller: Killing 'maliit-server' (4701) (tgid 4701), adj 200,
               to free 105000kB on behalf of 'kswapd0' (146) because
               cache 1625404kB is below limit 154832kB for oom score 12
               Free memory is -4952kB above reserved.
               Free CMA is 0kB
               Total reserve is 19248kB
               Total free pages is 22132kB
               Total file cache is 1639892kB
               GFP mask is 0x14000c0

[ 1007.018092] lowmemorykiller: Killing 'lomiri-push-ser' (5450) (tgid 5450), adj 200,
               to free 203852kB on behalf of 'kswapd0' (146) because
               cache 1610560kB is below limit 154832kB for oom score 12
               Free memory is -7324kB above reserved.
               Free CMA is 0kB
               Total reserve is 19248kB
               Total free pages is 17776kB
               Total file cache is 1623908kB
               GFP mask is 0x14000c0
......
[ 1014.065077] lowmemorykiller: Killing 'telegram' (5563) (tgid 5563), adj 200,
               to free 188032kB on behalf of 'kswapd0' (146) because
               cache 1623384kB is below limit 154832kB for oom score 12
               Free memory is -6236kB above reserved.
               Free CMA is 0kB
               Total reserve is 19248kB
               Total free pages is 20508kB
               Total file cache is 1644960kB
               GFP mask is 0x14000c0
[ 1014.101476] oom_reaper: reaped process 5563 (telegram), now anon-rss:0kB, file-rss:2180kB, shmem-rss:160kB
[ 1014.101710] lowmemorykiller: Killing 'maliit-server' (5523) (tgid 5523), adj 200,
               to free 94752kB on behalf of 'kswapd0' (146) because
               cache 1623928kB is below limit 154832kB for oom score 12
               Free memory is 29336kB above reserved.
               Free CMA is 32kB
               Total reserve is 19248kB
               Total free pages is 55840kB
               Total file cache is 1645632kB
               GFP mask is 0x14000c0

My configuration (should be default)

phablet@ubuntu-phablet:~$ sysctl vm.overcommit_memory
vm.overcommit_memory = 1
phablet@ubuntu-phablet:~$ sudo cat /proc/sys/vm/overcommit_memory
1
phablet@ubuntu-phablet:~$ sudo cat /sys/module/lowmemorykiller/parameters/adj
0,1,6,12
phablet@ubuntu-phablet:~$ sudo cat  /sys/module/lowmemorykiller/parameters/minfree
18432,23040,27648,38708,120640,144768
phablet@ubuntu-phablet:~$ LANG=C free -wh
               total        used        free      shared     buffers       cache   available
Mem:           3,5Gi       1,8Gi        30Mi        14Mi        48Mi       1,6Gi       1,7Gi
Swap:          2,0Gi       1,5Mi       2,0Gi

I don't have this problem with my pixel 3a 24.04-2
Before updated my redmi 9s I don't have any problem with ubuntu touch. Someone have the same problem ?

@wynn1212
Hi nothing. I've reinstall from ubport-installer. (but no wipe data)
If I enable update possible with GSM I've this error.

@Bouleetbil
That works if I select update only with wifi

Seems "Allow GSM? Yes" is the problem

Hi,
I've a pixel 3a devel version when I would update it, I find this log into recovery

System Image Upgrader for Ubuntu Touch
Preparing command file
Starting image upgrader
Loading keyring: Archive-master.tar.xz
xzcat:  read error
tar: short read

If I use cli for update it :

phablet@ubuntu-phablet:~$ sudo system-image-cli -v -p 0 --progress dots
[systemimage] May 06 15:44:46 2024 (4206) running state machine [20.04/arm64/android9plus/devel/sargo]
[systemimage] May 06 15:44:46 2024 (4206) Looking for blacklist: https://system-image.ubports.com/gpg/blacklist.tar.xz
[systemimage] May 06 15:44:46 2024 (4206) [0x79a0862eb0] Requesting group download:
        https://system-image.ubports.com/gpg/blacklist.tar.xz -> /var/lib/system-image/keyring.tar.xz
        https://system-image.ubports.com/gpg/blacklist.tar.xz.asc -> /var/lib/system-image/keyring.tar.xz.asc

[systemimage] May 06 15:44:46 2024 (4206) Allow GSM? Yes
[systemimage] May 06 15:44:46 2024 (4206) [/com/lomiri/applications/download/c7bcadd553224137bb0de43936b9ec37] Running group download reactor
[systemimage] May 06 15:44:46 2024 (4206) self: <LDMDownloadManager at 0x79a0862eb0>, self._iface: <Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0x79a0e7b220> :1.112 /com/lomiri/applications/download/c7bcadd553224137bb0de43936b9ec37 at 0x79a0867ac0> implementing 'com.lomiri.applications.GroupDownload' at 0x79a0867af0>
[systemimage] May 06 15:44:46 2024 (4206) [/com/lomiri/applications/download/c7bcadd553224137bb0de43936b9ec37] Group download reactor done
[systemimage] May 06 15:44:47 2024 (4206) Local blacklist file: /var/lib/system-image/blacklist.tar.xz
[systemimage] May 06 15:44:47 2024 (4206) Looking for: https://system-image.ubports.com/channels.json
[systemimage] May 06 15:44:47 2024 (4206) [0x79a0e74a30] Requesting group download:
        https://system-image.ubports.com/channels.json -> /tmp/system-image-5_pw213k/channels.json
        https://system-image.ubports.com/channels.json.asc -> /tmp/system-image-5_pw213k/channels.json.asc

[systemimage] May 06 15:44:47 2024 (4206) Allow GSM? Yes
[systemimage] May 06 15:44:47 2024 (4206) [/com/lomiri/applications/download/704e20c2586d461c8306d4fdd277a645] Running group download reactor
[systemimage] May 06 15:44:47 2024 (4206) self: <LDMDownloadManager at 0x79a0e74a30>, self._iface: <Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0x79a0e7b220> :1.112 /com/lomiri/applications/download/704e20c2586d461c8306d4fdd277a645 at 0x79a0867cd0> implementing 'com.lomiri.applications.GroupDownload' at 0x79a0867940>
.
.
.
.
[systemimage] May 06 15:44:47 2024 (4206) [/com/lomiri/applications/download/704e20c2586d461c8306d4fdd277a645] Group download reactor done
[systemimage] May 06 15:44:47 2024 (4206) Local channels file: /tmp/system-image-5_pw213k/channels.json
[systemimage] May 06 15:44:47 2024 (4206) got channel: 20.04/arm64/android9plus/devel
[systemimage] May 06 15:44:47 2024 (4206) found channel/device entry: 20.04/arm64/android9plus/devel/sargo
[systemimage] May 06 15:44:47 2024 (4206) [0x79a0e74a30] Requesting group download:
        https://system-image.ubports.com/20.04/arm64/android9plus/devel/sargo/index.json -> /tmp/system-image-5_pw213k/index.json
        https://system-image.ubports.com/20.04/arm64/android9plus/devel/sargo/index.json.asc -> /tmp/system-image-5_pw213k/index.json.asc

[systemimage] May 06 15:44:47 2024 (4206) Allow GSM? Yes
[systemimage] May 06 15:44:47 2024 (4206) [/com/lomiri/applications/download/974f306bb7f5402d8c436f5246f1b4a1] Running group download reactor
[systemimage] May 06 15:44:47 2024 (4206) self: <LDMDownloadManager at 0x79a0e74a30>, self._iface: <Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0x79a0e7b220> :1.112 /com/lomiri/applications/download/974f306bb7f5402d8c436f5246f1b4a1 at 0x79a0e01d30> implementing 'com.lomiri.applications.GroupDownload' at 0x79a0867cd0>
.
.
[systemimage] May 06 15:44:47 2024 (4206) [/com/lomiri/applications/download/974f306bb7f5402d8c436f5246f1b4a1] Group download reactor done
[systemimage] May 06 15:44:47 2024 (4206) Upgrade path is 851
[systemimage] May 06 15:44:48 2024 (4206) all files available in /android/cache/recovery
[systemimage] May 06 15:44:48 2024 (4206) preparing recovery
[systemimage] May 06 15:44:48 2024 (4206) applying
Rebooting with argument 'recovery'.

And I've the same error.

I should use ubport-installer for update it.
For each update I've the same error.
Someone have this problem ?

@Device hello,
I've tested with my volla phone devel version and I've the same problem
With my pixel3a RC that works.
For now I don't know why. Weird I will check

BTW I've updated https://gitlab.com/bouleetbil/ubports-scripts/ and test it from scratch with my new redmi 9

@moodroid Hello, I've updated install.sh for create /home/phablet/.config/systemd/user/ if necessary. For me it was created by amazfish
https://gitlab.com/bouleetbil/ubports-scripts/-/commit/3cc0f9bd7d615e9746e46daad419ee09f6567f19

@Rinkeby hello don't lanch install.sh with root. The scripts use sudo

@Rinkeby
Hello, no problem, you will have any conflict. It's just the official chroot for ubports.
I use it for test libertine.

@Rinkeby
I've tested xfce4, vnc, libreoffice, ssh that works
I've some issues with the virtual keyboard and chromium
For firefox with firefox-esr-mobile-config it's not bad but the keyboard hide the search bar.

I use this chroot with a physical keyboard and a wireless display as a little computer.

BTW I've added my script for enable wake up on tap on startup https://gitlab.com/bouleetbil/ubports-scripts#enable-wake-up-on-tap-on-startup

@Rinkeby
Hi, I've created a repo gitlab for install chroot debian
https://gitlab.com/bouleetbil/ubports-scripts#installation

it provided a systemd service for mount debian chroot https://gitlab.com/bouleetbil/ubports-scripts/-/blob/main/.config/systemd/user/debian-mount.service?ref_type=heads

After you can create some alias

#debian chroot
alias debian='/home/phablet/bin/debian-chroot.sh /bin/bash --login'
alias firefox='/home/phablet/bin/debian-chroot.sh firefox'

@moodroid
hello try to create chroot wirhout package and install packages manualy with apt

mkdir -p /home/phablet/Documents/debian
sudo debootstrap \
--arch arm64 \
bookworm \
/home/phablet/Documents/debian \
http://deb.debian.org/debian

@kugiigi
hello I will check that.

@Rinkeby
hello, yes I can install .deb.
I will create a git repo with my ubports scripts when I will have some times. For show the .desktop in lormiri I will probably add a script for scan all .desktop in this chroot and export it into ~/.local/share/applications/

@keb
The applications not ported to focal will disappear from the store.

But some applications not ported as https://open-store.io/app/alefnode.whatsweb can be downloaded and installed from the website and works for me.

You can verify if your applications are ported to focal on https://open-store.io before the migration
For example this application is not ported :

@jarop
Hi,
For me yes, but it's not really user friendly

• I can login as root or regular user.
  libertine can not : https://forums.ubports.com/topic/8797/libertine-focal-don-t-find-group-id?_=1698153549115

• I can add new repo
  https://gitlab.com/ubports/development/core/libertine/-/issues/124

• I can add additional bind-mounts
  https://gitlab.com/ubports/development/core/libertine/-/issues/120

• I can choose the GNU/Linux distribution as postmarket

But you should start the applications in command line, the desktop files are not into the lomiri launcher.

For chroot should more user friendly :
Create a systemd service user for mount all necessary on startup
Create a launcher or adapt lomiri-app-launch for start the application in this chroot
Added .desktop from chroot to lomiri launcher

Hello, howto debian chroot

• Create chroot

mkdir -p /home/phablet/Documents/debian
sudo debootstrap \
--include=btop,chromium,firefox-esr,maliit-inputcontext-gtk2,maliit-inputcontext-gtk3 \
--arch arm64 \
bookworm \
/home/phablet/Documents/debian \
http://deb.debian.org/debian

chroot created into /home/phablet/Documents/debian

• Create user phabet

sudo chroot /home/phablet/Documents/debian
useradd -m phablet --uid 32011

• Configure chroot for dbus, wayland, sound ... for user phablet
  Added to /home/phablet/.bashrc into chroot

export XDG_RUNTIME_DIR=/run/user/32011
export WAYLAND_DISPLAY=wayland-0
export DISPLAY=:0
export XSOCKET=/tmp/.X11-unix/X0
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/32011/bus
export USER=phablet
#keyboard
export QT_IM_MODULE=Maliit
export GTK_IM_MODULE=Maliit

• Start chroot as phablet user

MCHRDIR=/home/phablet/Documents/debian

cp /etc/hosts ${MCHRDIR}/etc/hosts
cp /etc/resolv.conf ${MCHRDIR}/etc/resolv.conf

mount -o bind /dev ${MCHRDIR}/dev
mount --bind /dev/pts ${MCHRDIR}/dev/pts
mount --bind /proc  ${MCHRDIR}/proc
mount --bind /tmp  ${MCHRDIR}/tmp
mount --bind /sys  ${MCHRDIR}/sys
mount --bind /run  ${MCHRDIR}/run

#dbus
mount -o bind /var/run/dbus/ ${MCHRDIR}/var/run/dbus

#shm (chromium)
mount --bind /dev/shm/ ${MCHRDIR}/dev/shm

#wayland
mkdir -p ${MCHRDIR}/run/user/32011
mount --bind /run/user/32011 ${MCHRDIR}/run/user/32011

chroot --userspec=phablet:phablet ${MCHRDIR} \
        /usr/bin/env -i \
        HOME=/home/phablet/ \
        TERM="$TERM" \
        PS1='(lfs chroot) \u:\w\$ ' \
        PATH=/usr/bin:/usr/sbin \
        /bin/bash --login

sleep 5
umount ${MCHRDIR}/dev/shm
umount ${MCHRDIR}/var/run/dbus/
umount ${MCHRDIR}/run/user/32011

umount ${MCHRDIR}/run
umount ${MCHRDIR}/sys
umount ${MCHRDIR}/proc
umount ${MCHRDIR}/dev/pts
umount ${MCHRDIR}/dev
umount ${MCHRDIR}/tmp

I've tested chromium firefox all seems works here on my pixel3a focal RC

TIP

• You can change PS1 in your chroot ~/.bashrc for identify quickly if you are into the chroot :

PS1='chroot \u@\h:\w\$ '

After login in your chroot

chroot phablet@ubuntu-phablet:/home/phablet$

• Change DPI
  cat ~/Documents/debian/home/phablet/.Xdefaults

xterm*faceName: DejaVu Sans Mono
xterm*faceSize: 10
Xft.dpi:200

You can adapt Xft.dpi with your display

• VNC xfce4 works
  

I can use my pixel3a with lomiri as mobile, And for a little desktop VNC if I don't have my dongle. I love this device

@lduboeuf
Hello, seems the ticket already exist https://gitlab.com/ubports/development/core/mediascanner2/-/issues/9