Fairphone 5 USB connection (filesystem) dies quickly

/e/ version: 2.2-t-20240715417772-stable-FP5
Device model(s): Fairphone 4
Developer mode enabled: yes
Device rooted: no (?)
Trackers blocker enabled: yes

Summary

When connecting the phone with my computer, I can briefly access the files via USB, but then the connection dies. (Same steps and cable work reliably with several FF4).

The problem

Steps to reproduce

Connect the FF5 with a computer via USB.
jmtpfs /scr/mirror/fairphone-helge/
cd /scr/mirror/fairphone-helge/
ls

What is the current behavior?

Sometimes (some) files/directories appear, but most often the following message is printed: [19864.701769] usb 1-4: device descriptor read/64, error -71 And the FF5 makes noises and flashes the screen.

If some files appear, then this error happens on the next "ls"

Afterwards, the device is unaccessible until I umount it.

What is the expected correct behavior?

I see all the files (and could copy them, etc.) and the FF would not make noises and would not flash the screen.

Technical informations

Relevant logs (adb logcat)

I got a log with about 6719 lines (which does not fit here). I can provide this in another way or I can reduce it, if you tell me which keywords are relevant for you.

Solutions

Workaround

I can prepare the copy command before mounting and use the "-u" option and hope to get some files. I repeat this until I got all files, which may be quite a few mount, copy, umount, unplug, plug sessions...

Possible fixes

Unfortunately no. It must be some difference between FF4/FF5.