@MrT10001 Thanks for the reply I will try the MSM tool, lets see if it works from Virtualbox with USB passthrough, after if backed up all block devices with dd.
Will report back.

Hi all, a few years ago I was using Ubuntu Touch (UT) on Sony Xperia X (suzu), but the experience was underwhelming, so I switched to LineageOS 20. But I now again consifer UT, since I got a new used phone.

Short story:

I got a used Oneplus N100 phone BE2013 (OxygenOS 11.0.15.BE83BA).
I see that the ratings of UT are good for Oneplus N100.
Also this phone is an A/B phone. I would like to install UT in one slot, and have Android 11 or Lineageos in the other slot. Can be the data partition split to data_a and data_b? I know that I need to resize a few partitions, perhaps split data partition (gdisk) and flash manually, preferably from RAM booted TWRP with dd (after backup with dd). Super partition is an issue. Can it be listed or mounted? It contains system, vendor etc.

Long story:

I entered Developer mode, enabled ADB debug, OEM unlock (must have wifi connected). Installed adb and fastboot on PC. Connected the USB cable from PC to phone. Rebooted to fastboot: adb reboot bootloader or Up+Down+Poweron.
I typed in the following command on PC: fastboot flashing unlock, then fastboot reboot.
I downloaded and ran the UBports installer appimage, and as per instructions I clicked on the download link to the MSM downgrade to Oxygenos 10.5.2 (for BE2013). Also I found a similar OTA image but cannot downgrade on phone.
I use Linux, but can install Windows 7 in Virtualbox and do USB passthrough so that the MSM tool has hardware access to the phone, if it works.
Also this phone is an A/B phone. I assume that UBports installer installs UT to slot A, which should have Android 10 as mentioned above (O 10.5.2).
Slot B is unbootable.
So I found fastboot flash images for the downgrade:
https://sourceforge.net/projects/fastbootroms/files/OnePlus Nord/

All great, but some flash images (like system, vendor etc.) are in super partition on the device, since they do not show up in fastboot:

fastboot getvar all. The result is:

(bootloader) parallel-download-flash:yes
(bootloader) hw-revision:10000
(bootloader) unlocked:yes
(bootloader) off-mode-charge:1
(bootloader) charger-screen-enabled:1
(bootloader) battery-soc-ok:yes
(bootloader) battery-voltage:4406
(bootloader) version-baseband:
(bootloader) version-bootloader:
(bootloader) erase-block-size: 0x1000
(bootloader) logical-block-size: 0x1000
(bootloader) variant:SM_ UFS
(bootloader) partition-type:fsc:raw
(bootloader) partition-size:fsc: 0x20000
(bootloader) partition-type:fsg:raw
(bootloader) partition-size:fsg: 0x200000
(bootloader) partition-type:modemst2:raw
(bootloader) partition-size:modemst2: 0x200000
(bootloader) partition-type:modemst1:raw
(bootloader) partition-size:modemst1: 0x200000
(bootloader) partition-type:ALIGN_TO_128K_2:raw
(bootloader) partition-size:ALIGN_TO_128K_2: 0x1A000
(bootloader) partition-type:catecontentfv:raw
(bootloader) partition-size:catecontentfv: 0x100000
(bootloader) partition-type:catefv:raw
(bootloader) partition-size:catefv: 0x80000
(bootloader) partition-type:storsec_b:raw
(bootloader) partition-size:storsec_b: 0x20000
(bootloader) partition-type:reserve4:raw
(bootloader) partition-size:reserve4: 0xFD0000
(bootloader) partition-type:reserve3:raw
(bootloader) partition-size:reserve3: 0xFD0000
(bootloader) partition-type:reserve2:raw
(bootloader) partition-size:reserve2: 0xFD0000
(bootloader) partition-type:reserve1:raw
(bootloader) partition-size:reserve1: 0x7E8000
(bootloader) partition-type:hyp_log:raw
(bootloader) partition-size:hyp_log: 0xFD0000
(bootloader) partition-type:qsee_log:raw
(bootloader) partition-size:qsee_log: 0xFD0000
(bootloader) partition-type:android_log:raw
(bootloader) partition-size:android_log: 0xFD0000
(bootloader) partition-type:kernel_log:raw
(bootloader) partition-size:kernel_log: 0xFD0000
(bootloader) partition-type:abl_log:raw
(bootloader) partition-size:abl_log: 0xFD0000
(bootloader) partition-type:op1:raw
(bootloader) partition-size:op1: 0x12C00000
(bootloader) partition-type:aging_mod:raw
(bootloader) partition-size:aging_mod: 0x2000000
(bootloader) partition-type:aging_kernel:raw
(bootloader) partition-size:aging_kernel: 0x4000000
(bootloader) partition-type:secdata:raw
(bootloader) partition-size:secdata: 0x7000
(bootloader) partition-type:uefivarstore:raw
(bootloader) partition-size:uefivarstore: 0x80000
(bootloader) partition-type:multiimgqti:raw
(bootloader) partition-size:multiimgqti: 0x8000
(bootloader) partition-type:multiimgoem:raw
(bootloader) partition-size:multiimgoem: 0x8000
(bootloader) partition-type:storsec_a:raw
(bootloader) partition-size:storsec_a: 0x20000
(bootloader) partition-type:logdump:raw
(bootloader) partition-size:logdump: 0x4000000
(bootloader) partition-type:rawdump:raw
(bootloader) partition-size:rawdump: 0x8000000
(bootloader) partition-type:cateloader:raw
(bootloader) partition-size:cateloader: 0x200000
(bootloader) partition-type:logfs:raw
(bootloader) partition-size:logfs: 0x800000
(bootloader) partition-type:toolsfv:raw
(bootloader) partition-size:toolsfv: 0x100000
(bootloader) partition-type:limits:raw
(bootloader) partition-size:limits: 0x1000
(bootloader) partition-type:splash:raw
(bootloader) partition-size:splash: 0x20A4000
(bootloader) partition-type:spunvm:raw
(bootloader) partition-size:spunvm: 0x800000
(bootloader) partition-type:apdp:raw
(bootloader) partition-size:apdp: 0x40000
(bootloader) partition-type:dip:raw
(bootloader) partition-size:dip: 0x100000
(bootloader) partition-type:devinfo:raw
(bootloader) partition-size:devinfo: 0x1000
(bootloader) partition-type:uefisecapp_b:raw
(bootloader) partition-size:uefisecapp_b: 0x200000
(bootloader) partition-type:logo_b:raw
(bootloader) partition-size:logo_b: 0x1000000
(bootloader) partition-type:imagefv_b:raw
(bootloader) partition-size:imagefv_b: 0x200000
(bootloader) partition-type:featenabler_b:raw
(bootloader) partition-size:featenabler_b: 0x20000
(bootloader) partition-type:dtbo_b:raw
(bootloader) partition-size:dtbo_b: 0x1800000
(bootloader) partition-type:vbmeta_b:raw
(bootloader) partition-size:vbmeta_b: 0x10000
(bootloader) partition-type:qupfw_b:raw
(bootloader) partition-size:qupfw_b: 0x10000
(bootloader) partition-type:devcfg_b:raw
(bootloader) partition-size:devcfg_b: 0x20000
(bootloader) partition-type:cmnlib64_b:raw
(bootloader) partition-size:cmnlib64_b: 0x80000
(bootloader) partition-type:cmnlib_b:raw
(bootloader) partition-size:cmnlib_b: 0x80000
(bootloader) partition-type:boot_b:raw
(bootloader) partition-size:boot_b: 0x6000000
(bootloader) partition-type:keymaster_b:raw
(bootloader) partition-size:keymaster_b: 0x80000
(bootloader) partition-type:dsp_b:raw
(bootloader) partition-size:dsp_b: 0x2000000
(bootloader) partition-type:abl_b:raw
(bootloader) partition-size:abl_b: 0x800000
(bootloader) partition-type:mdtp_b:raw
(bootloader) partition-size:mdtp_b: 0x2000000
(bootloader) partition-type:mdtpsecapp_b:raw
(bootloader) partition-size:mdtpsecapp_b: 0x400000
(bootloader) partition-type:bluetooth_b:raw
(bootloader) partition-size:bluetooth_b: 0x100000
(bootloader) partition-type:modem_b:raw
(bootloader) partition-size:modem_b: 0x20000000
(bootloader) partition-type:hyp_b:raw
(bootloader) partition-size:hyp_b: 0x80000
(bootloader) partition-type:tz_b:raw
(bootloader) partition-size:tz_b: 0x400000
(bootloader) partition-type:rpm_b:raw
(bootloader) partition-size:rpm_b: 0x80000
(bootloader) partition-type:featenabler_a:raw
(bootloader) partition-size:featenabler_a: 0x20000
(bootloader) partition-type:uefisecapp_a:raw
(bootloader) partition-size:uefisecapp_a: 0x200000
(bootloader) partition-type:logo_a:raw
(bootloader) partition-size:logo_a: 0x1000000
(bootloader) partition-type:imagefv_a:raw
(bootloader) partition-size:imagefv_a: 0x200000
(bootloader) partition-type:dtbo_a:raw
(bootloader) partition-size:dtbo_a: 0x1800000
(bootloader) partition-type:vbmeta_a:raw
(bootloader) partition-size:vbmeta_a: 0x10000
(bootloader) partition-type:qupfw_a:raw
(bootloader) partition-size:qupfw_a: 0x10000
(bootloader) partition-type:devcfg_a:raw
(bootloader) partition-size:devcfg_a: 0x20000
(bootloader) partition-type:cmnlib64_a:raw
(bootloader) partition-size:cmnlib64_a: 0x80000
(bootloader) partition-type:cmnlib_a:raw
(bootloader) partition-size:cmnlib_a: 0x80000
(bootloader) partition-type:boot_a:raw
(bootloader) partition-size:boot_a: 0x6000000
(bootloader) partition-type:keymaster_a:raw
(bootloader) partition-size:keymaster_a: 0x80000
(bootloader) partition-type:dsp_a:raw
(bootloader) partition-size:dsp_a: 0x2000000
(bootloader) partition-type:abl_a:raw
(bootloader) partition-size:abl_a: 0x800000
(bootloader) partition-type:mdtp_a:raw
(bootloader) partition-size:mdtp_a: 0x2000000
(bootloader) partition-type:mdtpsecapp_a:raw
(bootloader) partition-size:mdtpsecapp_a: 0x400000
(bootloader) partition-type:bluetooth_a:raw
(bootloader) partition-size:bluetooth_a: 0x100000
(bootloader) partition-type:modem_a:raw
(bootloader) partition-size:modem_a: 0x20000000
(bootloader) partition-type:hyp_a:raw
(bootloader) partition-size:hyp_a: 0x80000
(bootloader) partition-type:tz_a:raw
(bootloader) partition-size:tz_a: 0x400000
(bootloader) partition-type:rpm_a:raw
(bootloader) partition-size:rpm_a: 0x80000
(bootloader) partition-type:ddr:raw
(bootloader) partition-size:ddr: 0x200000
(bootloader) partition-type:cdt:raw
(bootloader) partition-size:cdt: 0x20000
(bootloader) partition-type:ALIGN_TO_128K_1:raw
(bootloader) partition-size:ALIGN_TO_128K_1: 0x1A000
(bootloader) partition-type:xbl_config_b:raw
(bootloader) partition-size:xbl_config_b: 0x20000
(bootloader) partition-type:xbl_b:raw
(bootloader) partition-size:xbl_b: 0x500000
(bootloader) partition-type:xbl_config_a:raw
(bootloader) partition-size:xbl_config_a: 0x20000
(bootloader) partition-type:xbl_a:raw
(bootloader) partition-size:xbl_a: 0x500000
(bootloader) partition-type:userdata:f2fs
(bootloader) partition-size:userdata: 0xB30C53000
(bootloader) partition-type:metadata:raw
(bootloader) partition-size:metadata: 0x1000000
(bootloader) partition-type:vbmeta_system_b:raw
(bootloader) partition-size:vbmeta_system_b: 0x10000
(bootloader) partition-type:vbmeta_system_a:raw
(bootloader) partition-size:vbmeta_system_a: 0x10000
(bootloader) partition-type:recovery_b:raw
(bootloader) partition-size:recovery_b: 0x6000000
(bootloader) partition-type:recovery_a:raw
(bootloader) partition-size:recovery_a: 0x6000000
(bootloader) partition-type:super:raw
(bootloader) partition-size:super: 0x280000000
(bootloader) partition-type:config:raw
(bootloader) partition-size:config: 0x80000
(bootloader) partition-type:op2:raw
(bootloader) partition-size:op2: 0x10000000
(bootloader) partition-type:carrier:raw
(bootloader) partition-size:carrier: 0x4000000
(bootloader) partition-type:param:raw
(bootloader) partition-size:param: 0x100000
(bootloader) partition-type:frp:raw
(bootloader) partition-size:frp: 0x80000
(bootloader) partition-type:keystore:raw
(bootloader) partition-size:keystore: 0x80000
(bootloader) partition-type:misc:raw
(bootloader) partition-size:misc: 0x100000
(bootloader) partition-type:persist:raw
(bootloader) partition-size:persist: 0x2000000
(bootloader) partition-type:ssd:raw
(bootloader) partition-size:ssd: 0x2000
(bootloader) has-slot:modem:yes
(bootloader) has-slot:system:no
(bootloader) current-slot:a
(bootloader) has-slot:boot:yes
(bootloader) slot-retry-count:b:7
(bootloader) slot-unbootable:b:no
(bootloader) slot-successful:b:no
(bootloader) slot-retry-count:a:7
(bootloader) slot-unbootable:a:no
(bootloader) slot-successful:a:yes
(bootloader) slot-count:2
(bootloader) secure:yes
(bootloader) serialno:947864fd
(bootloader) product:bengal
(bootloader) is-userspace:no
(bootloader) max-download-size:804280320
(bootloader) kernel:uefi
all: 
Finished. Total time: 0.011s

(Are the partition sizes counted in 4096 byte blocks in hex? )

I downloaded TWRP:
https://xdaforums.com/t/twrp-3-5-2_11-0-for-oneplus-nord-n100-android-11.4329985/
And some partitioning tools:
https://xdaforums.com/t/how-to-boot-from-sd-card-successfully-on-qmobile-z8-with-bricked-dead-emmc.3712171/

Download the aarch64 package. Gdisk works for me.

Now do fastboot boot twrp.img. Disable Mount>MTP on the phone.
Exctract gdisk, adb push gdisk /sbin,then adb shell
The prompt appears:
billie2: /#
Type chmod +x /sbin/gdisk

You have su access, some important commands are present like dd, gzip, mkfs, mount ...
You can list partitions by typing ls -la /dev/block/by-name

type gdisk and at the prompt enter the path to block device e.g. /dev/block/sd*
Type ? for help at the prompt.
Listing of partitions on each block device:

Disk /dev/block/sda: 14499840 sectors, 55.3 GiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): F402E96F-7A94-A018-9CC9-17A36E2B88E0
Partition table holds up to 32 entries
Main partition table begins at sector 2 and ends at sector 2
First usable sector is 6, last usable sector is 14499834
Partitions will be aligned on 2-sector boundaries
Total free space is 0 sectors (0 bytes)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6               7   8.0 KiB     FFFF  ssd
   2               8            8199   32.0 MiB    FFFF  persist
   3            8200            8455   1024.0 KiB  FFFF  misc
   4            8456            8583   512.0 KiB   FFFF  keystore
   5            8584            8711   512.0 KiB   FFFF  frp
   6            8712            8967   1024.0 KiB  FFFF  param
   7            8968           25351   64.0 MiB    FFFF  carrier
   8           25352           90887   256.0 MiB   FFFF  op2
   9           90888           91015   512.0 KiB   FFFF  config
  10           91016         2712455   10.0 GiB    FFFF  super
  11         2712456         2737031   96.0 MiB    FFFF  recovery_a
  12         2737032         2761607   96.0 MiB    FFFF  recovery_b
  13         2761608         2761623   64.0 KiB    FFFF  vbmeta_system_a
  14         2761624         2761639   64.0 KiB    FFFF  vbmeta_system_b
  15         2761640         2765735   16.0 MiB    FFFF  metadata
  16         2765736        14499834   44.8 GiB    FFFF  userdata

Disk /dev/block/sdb: 2048 sectors, 8.0 MiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): 9F2CDFE8-7B12-49EF-7BC5-BBD00FAF36DA
Partition table holds up to 32 entries
Main partition table begins at sector 2 and ends at sector 2
First usable sector is 6, last usable sector is 2042
Partitions will be aligned on 2-sector boundaries
Total free space is 725 sectors (2.8 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6            1285   5.0 MiB     FFFF  xbl_a
   2            1286            1317   128.0 KiB   FFFF  xbl_config_a
   3            1318            2042   2.8 MiB     FFFF  last_parti

Disk /dev/block/sdc: 2048 sectors, 8.0 MiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): 8225D2D2-089D-7418-C548-B09CCFB902D8
Partition table holds up to 32 entries
Main partition table begins at sector 2 and ends at sector 2
First usable sector is 6, last usable sector is 2042
Partitions will be aligned on 2-sector boundaries
Total free space is 725 sectors (2.8 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6            1285   5.0 MiB     FFFF  xbl_b
   2            1286            1317   128.0 KiB   FFFF  xbl_config_b
   3            1318            2042   2.8 MiB     FFFF  last_parti

Disk /dev/block/sdd: 32768 sectors, 128.0 MiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): DF4881BA-544D-617F-3C15-E71D6D7B71AD
Partition table holds up to 32 entries
Main partition table begins at sector 2 and ends at sector 2
First usable sector is 6, last usable sector is 32762
Partitions will be aligned on 2-sector boundaries
Total free space is 32187 sectors (125.7 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6              31   104.0 KiB   FFFF  ALIGN_TO_128K_1
   2              32              63   128.0 KiB   FFFF  cdt
   3              64             575   2.0 MiB     FFFF  ddr
   4             576           32762   125.7 MiB   FFFF  last_parti

Disk /dev/block/sde: 1048576 sectors, 4.0 GiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): 89821655-CF71-C0BC-C646-04624380BE63
Partition table holds up to 96 entries
Main partition table begins at sector 2 and ends at sector 4
First usable sector is 6, last usable sector is 1048570
Partitions will be aligned on 1-sector boundaries
Total free space is 472720 sectors (1.8 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6             133   512.0 KiB   FFFF  rpm_a
   2             134            1157   4.0 MiB     FFFF  tz_a
   3            1158            1285   512.0 KiB   FFFF  hyp_a
   4            1286          132357   512.0 MiB   0700  modem_a
   5          132358          132613   1024.0 KiB  FFFF  bluetooth_a
   6          132614          133637   4.0 MiB     FFFF  mdtpsecapp_a
   7          133638          141829   32.0 MiB    FFFF  mdtp_a
   8          141830          143877   8.0 MiB     FFFF  abl_a
   9          143878          152069   32.0 MiB    FFFF  dsp_a
  10          152070          152197   512.0 KiB   FFFF  keymaster_a
  11          152198          176773   96.0 MiB    FFFF  boot_a
  12          176774          176901   512.0 KiB   FFFF  cmnlib_a
  13          176902          177029   512.0 KiB   FFFF  cmnlib64_a
  14          177030          177061   128.0 KiB   FFFF  devcfg_a
  15          177062          177077   64.0 KiB    FFFF  qupfw_a
  16          177078          177093   64.0 KiB    FFFF  vbmeta_a
  17          177094          183237   24.0 MiB    FFFF  dtbo_a
  18          183238          183749   2.0 MiB     FFFF  imagefv_a
  19          183750          187845   16.0 MiB    FFFF  logo_a
  20          187846          188357   2.0 MiB     FFFF  uefisecapp_a
  21          188358          188389   128.0 KiB   FFFF  featenabler_a
  22          188390          188517   512.0 KiB   FFFF  rpm_b
  23          188518          189541   4.0 MiB     FFFF  tz_b
  24          189542          189669   512.0 KiB   FFFF  hyp_b
  25          189670          320741   512.0 MiB   FFFF  modem_b
  26          320742          320997   1024.0 KiB  FFFF  bluetooth_b
  27          320998          322021   4.0 MiB     FFFF  mdtpsecapp_b
  28          322022          330213   32.0 MiB    FFFF  mdtp_b
  29          330214          332261   8.0 MiB     FFFF  abl_b
  30          332262          340453   32.0 MiB    FFFF  dsp_b
  31          340454          340581   512.0 KiB   FFFF  keymaster_b
  32          340582          365157   96.0 MiB    FFFF  boot_b
  33          365158          365285   512.0 KiB   FFFF  cmnlib_b
  34          365286          365413   512.0 KiB   FFFF  cmnlib64_b
  35          365414          365445   128.0 KiB   FFFF  devcfg_b
  36          365446          365461   64.0 KiB    FFFF  qupfw_b
  37          365462          365477   64.0 KiB    FFFF  vbmeta_b
  38          365478          371621   24.0 MiB    FFFF  dtbo_b
  39          371622          371653   128.0 KiB   FFFF  featenabler_b
  40          371654          372165   2.0 MiB     FFFF  imagefv_b
  41          372166          376261   16.0 MiB    FFFF  logo_b
  42          376262          376773   2.0 MiB     FFFF  uefisecapp_b
  43          376774          376774   4.0 KiB     FFFF  devinfo
  44          376775          377030   1024.0 KiB  FFFF  dip
  45          377031          377094   256.0 KiB   FFFF  apdp
  46          377095          379142   8.0 MiB     FFFF  spunvm
  47          379143          387498   32.6 MiB    FFFF  splash
  48          387499          387499   4.0 KiB     FFFF  limits
  49          387500          387755   1024.0 KiB  FFFF  toolsfv
  50          387756          389803   8.0 MiB     FFFF  logfs
  51          389804          390315   2.0 MiB     FFFF  cateloader
  52          390316          423083   128.0 MiB   FFFF  rawdump
  53          423084          439467   64.0 MiB    FFFF  logdump
  54          439468          439499   128.0 KiB   FFFF  storsec_a
  55          439500          439507   32.0 KiB    FFFF  multiimgoem
  56          439508          439515   32.0 KiB    FFFF  multiimgqti
  57          439516          439643   512.0 KiB   FFFF  uefivarstore
  58          439644          439650   28.0 KiB    FFFF  secdata
  59          439651          456034   64.0 MiB    FFFF  aging_kernel
  60          456035          464226   32.0 MiB    FFFF  aging_mod
  61          464227          541026   300.0 MiB   FFFF  op1
  62          541027          545074   15.8 MiB    FFFF  abl_log
  63          545075          549122   15.8 MiB    FFFF  kernel_log
  64          549123          553170   15.8 MiB    FFFF  android_log
  65          553171          557218   15.8 MiB    FFFF  qsee_log
  66          557219          561266   15.8 MiB    FFFF  hyp_log
  67          561267          563290   7.9 MiB     FFFF  reserve1
  68          563291          567338   15.8 MiB    FFFF  reserve2
  69          567339          571386   15.8 MiB    FFFF  reserve3
  70          571387          575434   15.8 MiB    FFFF  reserve4
  71          575435          575466   128.0 KiB   FFFF  storsec_b
  72          575467          575594   512.0 KiB   FFFF  catefv
  73          575595          575850   1024.0 KiB  FFFF  catecontentfv
  74          575851         1048570   1.8 GiB     FFFF  last_parti

Disk /dev/block/sdf: 32768 sectors, 128.0 MiB
Sector size (logical/physical): 4096/4096 bytes
Disk identifier (GUID): CB556B31-2645-BAE8-A0D1-A0F6009B2737
Partition table holds up to 32 entries
Main partition table begins at sector 2 and ends at sector 2
First usable sector is 6, last usable sector is 32762
Partitions will be aligned on 2-sector boundaries
Total free space is 31163 sectors (121.7 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1               6              31   104.0 KiB   FFFF  ALIGN_TO_128K_2
   2              32             543   2.0 MiB     FFFF  modemst1
   3             544            1055   2.0 MiB     FFFF  modemst2
   4            1056            1567   2.0 MiB     FFFF  fsg
   5            1568            1599   128.0 KiB   FFFF  fsc
   6            1600           32762   121.7 MiB   FFFF  last_parti

@bdomecq I found fastboot flash images for Oneplus Nord devices.
https://xdaforums.com/t/rom-stock-fastboot-opn-stock-fastboot-roms-for-oneplus-nord.4142153/

The problem is that system etc. is in super partition.

@MrT10001 One needs to pass through the USB device in virtual machine (like Virtual Box) for Windows to have access to the hardware.

I have a similiar Oneplus N100 device BE2013. Should I start a new thread since the issue is quite complicated.

@Moem The Stable version is Xenial Xerus, the RC version is Focal Fossa.

Not running Dev version. I aim for stability and functionality. For Sony Xperia X, Xenial Xerus works the best even if it has some bugs.

@Moem I was running Stable version, then tried RC version. It turns out Stable version is better (more stable), just have to figure out how to configure the system in terminal to fine tune it.

@Keneda @arubislander

I have installed UT 20.4 and it turn out it has more bugs than 16.4. For example vibration bugs, when the device goes in sleep mode when camera is turned on. The zoom on camera produces screen artefacts on both versions. Morph browser works with facebook messenger only in Desktop mode. Music playback stops when another app is opened, the headphones jack daemon sometimes behaves erratically, when the jack is plugged in.
I am not bothering with Firefox.

16.4 version is faster, the battery heats up less. Also the battery drainage when WiFi is on, is much greater.

So I stick to 16.4 version, because it has Onion browser in the Appstore. Also a screensaver would be a nice feature, to play music and manage notification while the screen is off, but maintain internet connectivity without the default screen lock. Might look into app development.

I love Linux, and Ubuntu touch, but this is not as advertised for Sony Xperia X. I guess I will have to mod the system myself even if no official support is available for 16.4.

@arubislander Yes, I am running 16.04 Stable versioun of Ubuntu Touch.

I gave up on Firefox. I use Morph Browser for listening music, and facebook. Just need to configure notifications for the browser, and to be able to listen to music while the phone is locked.

I will open a new thread for Morph browser.

@Keneda I was following this guide, but the still cannot install Firefox in Libertine. It is not working.
https://blog.arubislander.nl/2018/10/running-firefox-in-1604-libertine.html

@Keneda Thanks for your reply, but I was unsuccessful installing Firefox in Libertine.