"Failed to Load config" on linux with the head of iceman proxmark3

[gbin]

First I had to work around the incorrect CLI syntax for the client:
-p /dev/<port> -f

It looks like it starts but then I don't see the reason for the failure in the captured log:

[=] Session log /home/gbin/.proxmark3/logs/log_20220513.txt
[=] Output will be flushed after every print.


[+] loaded from JSON file /home/gbin/.proxmark3/preferences.json

[=] Using UART port /dev/ttyACM0

[=] Communicating with PM3 over USB-CDC

[usb|script] pm3 --> hw version


 [ Proxmark3 RFID instrument ]

 [ CLIENT ]

  Iceman/master/v4.14831-597-gdb2157661 2022-05-13 08:27:57 fcb68954e

  compiled with............. GCC 12.1.0

  platform.................. Linux / x86_64

  Readline support.......... present

  QT GUI support............ present

  native BT support......... present

  Python script support..... present

  Lua SWIG support.......... present

  Python SWIG support....... present


 [ PROXMARK3 ]

  firmware.................. PM3 GENERIC


 [ ARM ]
  bootrom: Iceman/master/v4.14831-597-gdb2157661 2022-05-13 08:27:55 fcb68954e
       os: Iceman/master/v4.14831-597-gdb2157661 2022-05-13 08:28:00 fcb68954e
  compiled with GCC 12.1.0

 [ FPGA ] 
  LF image 2s30vq100 2022-03-23 17:21:05
  HF image 2s30vq100 2022-03-23 17:21:16
  HF FeliCa image 2s30vq100 2022-03-23 17:21:27
  HF 15 image 2s30vq100 2022-03-23 17:21:38


 [ Hardware ]
  --= uC: AT91SAM7S512 Rev A
  --= Embedded Processor: ARM7TDMI
  --= Internal SRAM size: 64K bytes
  --= Architecture identifier: AT91SAM7Sxx Series
  --= Embedded flash memory 512K bytes ( 58% used )

[wh201906]

Hi. You need to follow these steps

1. Go to the Settings panel, set the start argument to -p /dev/<port> -f. The client will remember these settings.
2. Set the config file path, like ../config/config_rrgv4.13.json, then connect
3. If the GUI still can't connected to the hardware, check the Keep the client active even the PM3 hardware is disconnected

[gbin]

Thanks it works! maybe having some kind of sane defaults might help the usability :)

[wh201906]

OK
Thanks for your advice.