Hi guys, I managed to have this working (on lubuntu) following
https://linuxmusicians.com/viewtopic.php?t=16711

In short, blacklist snd_usb_audio (and get the board listed as US-122L
instead of US-122mkII)

lfredo@alfredo-pc:~$ cat /proc/asound/cards 
 0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xdbff8000 irq 23
 1 [US122L         ]: USB US-122L - TASCAM US-122L
                      TASCAM US-122L (644:8021 if 0 at 001/002)

Then create .asoundrc file.

And finally run jackd with the following presets

jackd -RP60 -dalsa -dusb_stream:1  -r48000 -p256 -n2

Hope someone find this useful.

Regards, Alfredo

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1791196

Title:
  [USB-Audio - US122 MKII, recording] Recording problem

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Can't get the US122 MKII listed as an input device.

  Not in pavucontrol, nor in sound settings nor in jackd.

  May be this helps,

  alfredo@alfredo-ubuntu:~$ jackd -d alsa -d hw:MKII
  jackdmp 1.9.12
  ...
  Acquire audio card Audio1
  creating alsa driver ... 
hw:MKII|hw:MKII|1024|2|48000|0|0|nomon|swmeter|-|32bit
  ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to 
playback-only mode
  ...

  Please let me know if you need further information.

  Regards, Alfredo

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
  Uname: Linux 4.15.0-33-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  alfredo    7890 F.... pulseaudio
   /dev/snd/controlC1:  alfredo    7890 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Sep  6 22:02:55 2018
  InstallationDate: Installed on 2018-03-03 (187 days ago)
  InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 
(20180228)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingPlaybackStderr: o p e n ( ) :   N o   s u c h   f i l e  
 o r   d i r e c t o r y
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:MKII failed
  Symptom_AlsaRecordingTestStderr: a r e c o r d :   m a i n : 7 8 8 :   a u d 
i o   o p e n   e r r o r :   N o   s u c h   f i l e   o r   d i r e c t o r y
  Symptom_Card: TASCAM US-122mkII - US122 MKII
  Symptom_Type: None of the above
  Title: [USB-Audio - US122 MKII, recording] Recording problem
  UpgradeStatus: Upgraded to bionic on 2018-09-02 (4 days ago)
  dmi.bios.date: 03/26/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0503
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M2N-MX SE Plus
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev x.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0503:bd03/26/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N-MXSEPlus:rvrRevx.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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