[EN] Mounting exfat USB drive

[finotti]

Using plasma, when I try plugin an exfat formatted USB drive and asking it to be mounted (by the plasma pop-up), it takes a while and I get the message "You are not authorized to mount this device.".

If I try, as root, "mnt /dev/sde1 /mnt", it hangs for a long time, but eventually it mounts it.  But any operation takes a really long time.

I've installed exfat-fuse, and it mounts the same drive faster and operations do not take a long time.

(My installation of Debian Trixie does not have this problem, with the same USB drive.)

Any ideas of what could be wrong?

Code: [Select]

# inxi -v3
System:
  Host: debian Kernel: 6.17.8-1-siduction-amd64 arch: x86_64 bits: 64
    compiler: gcc v: 15.2.0
  Console: pty pts/9 Distro: siduction 2024.1.0 shine-on - kde -
    (202412261719) base: Debian GNU/Linux forky/sid
Machine:
  Type: Desktop System: Micro-Star product: MS-7E51 v: 1.0 serial: N/A
  Mobo: Micro-Star model: MAG X870 TOMAHAWK WIFI (MS-7E51) v: 1.0
    serial: 07E5111_P61C805067 UEFI: American Megatrends LLC. v: 1.A69
    date: 09/19/2025
Battery:
  Device-1: hidpp_battery_0 model: Logitech Wireless Mouse M510
    charge: 55% (should be ignored) status: discharging
  Device-2: wacom_battery_0 model: Wacom Intuos BT S charge: 100%
    status: discharging
CPU:
  Info: 8-core model: AMD Ryzen 7 9700X bits: 64 type: MT MCP arch: Zen 5
    rev: 0 cache: L1: 640 KiB L2: 8 MiB L3: 32 MiB
  Speed (MHz): avg: 3617 min/max: 605/5582 boost: enabled cores: 1: 3617
    2: 3617 3: 3617 4: 3617 5: 3617 6: 3617 7: 3617 8: 3617 9: 3617 10: 3617
    11: 3617 12: 3617 13: 3617 14: 3617 15: 3617 16: 3617 bogomips: 121599
  Flags-basic: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a
    ssse3 svm
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Navi 23 [Radeon RX 6600/6600
    XT/6600M] vendor: ASRock driver: amdgpu v: kernel arch: RDNA-2
    bus-ID: 03:00.0
  Device-2: Advanced Micro Devices [AMD/ATI] Granite Ridge [Radeon Graphics]
    vendor: Micro-Star MSI driver: amdgpu v: kernel arch: RDNA-2 bus-ID: 74:00.0
    temp: 38.0 C
  Device-3: Logitech Webcam C270 driver: snd-usb-audio,uvcvideo type: USB
    bus-ID: 1-3.1.4:7
  Display: unspecified server: X.Org v: 21.1.20 with: Xwayland v: 24.1.8
    driver: X: loaded: amdgpu unloaded: fbdev,modesetting,radeon,vesa
    dri: radeonsi gpu: amdgpu resolution: 1: 1920x1080~60Hz 2: 1920x1080~60Hz
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 25.2.6-1 glx-v: 1.4
    direct-render: yes renderer: AMD Radeon RX 6600 (radeonsi navi23 LLVM
    19.1.7 DRM 3.64 6.17.8-1-siduction-amd64)
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: amdgpu_top wl: wayland-info
    x11: xdriinfo, xdpyinfo, xprop, xrandr
Network:
  Device-1: Qualcomm WCN785x Wi-Fi 7 320MHz 2x2 [FastConnect 7800]
    vendor: Foxconn Band Simultaneous Wireless driver: N/A bus-ID: 09:00.0
  Device-2: Realtek RTL8126 5GbE vendor: Micro-Star MSI driver: r8169
    v: kernel port: e000 bus-ID: 0a:00.0
  IF: enp10s0 state: up speed: 100 Mbps duplex: full mac: 34:5a:60:03:0a:a5
Drives:
  Local Storage: total: 19.34 TiB used: 6.87 TiB (35.6%)
Info:
  Memory: total: 64 GiB note: est. available: 60.4 GiB used: 7.93 GiB (13.1%)
  Processes: 603 Uptime: 14m Init: systemd
  Packages: 5036 Compilers: clang: 19.1.7 gcc: 15.2.0 Shell: Bash v: 5.3.3
    inxi: 3.3.39


[orinoco]

Check which group your user is in.

Code: [Select]

$ groups $USER
Please post the result here.

[finotti]

Thanks for the reply!

Here it is:

Code: [Select]

$ groups $USER
finotti : finotti lp dialout cdrom floppy audio dip video plugdev users systemd-journal kvm netdev bluetooth lpadmin pipewire scanner fuse powerdev storage vboxusers

I'd think there is something more going on, as even as root, when I can mount it, performance is really slow...  But let me know if see anything wrong.

[orinoco]

Please run the following command in a terminal window and hit return key several times to see the exact start of the next output. Then insert the usb drive:

Code: [Select]

sudo dmesg -w
Please post the result here.

[finotti]

Hmm....

It seems to be working as expected now.  I had the problem mentioned before a few times (in different days, after reboots, etc.), but hadn't tried since I've posted.  Maybe an update fixed it?

I will post the results if that happens again.

But I greatly appreciate your help, and sorry for the noise.