I am seeing somewhat the same issue on Manjaro.
When I plug the phone in is starts charging (in the appropriate mode according to its on/off state at the time).
But if plugged in while the device is on, it does not appear in the USB devices menu in the KDE toolbar.
It does however appear to be recognized by the OS as the dmesg
output is sensible:
[489387.766340] usb 2-1.3: new high-speed USB device number 10 using ehci-pci
[489387.865961] usb 2-1.3: New USB device found, idVendor=1209, idProduct=0002, bcdDevice= 4.04
[489387.865971] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[489387.865974] usb 2-1.3: Product: 5T
[489387.865976] usb 2-1.3: Manufacturer: OnePlus
[489387.865978] usb 2-1.3: SerialNumber: d7dfe97c
and it shows up in the list of USB devices in the system info tool. It also appears in the dolphin
"Places" sidebar, but when I try to access it via that, I get an error:
Could not access device. Make sure it is unlocked, and tap "Allow" on the popup on its screen. If that does not work, make sure MTP is enabled in its USB connection settings.
I do not see (and never have seen) an allow popup on the screen, but according to the UT tweaks tool MTP is enabled (and it does not allow me to disable it).
FWIW, on the PC:
$ pacman -Qs android
local/android-tools 35.0.2-7
Android platform tools
local/android-udev 20241109-1
Udev rules to connect Android devices to your linux box
local/gvfs-mtp 1.56.1-1 (gnome)
Virtual filesystem implementation for GIO - MTP backend (Android, media
player)
(Omitting a few libcamera related matches)