Hello!
I have a problem with Boinc 8.0.2.
If I use Boinc as a flatpack everything works fine (except for LHC), but if I want to use the installable version I always get the following error message:

Invalid client RPC password. Try reinstalling BOINC.

A new installation does not bring any improvement.

Neither does a sudo usermod -a -G boinc ralf

Now my question: “Is it possible to copy the data from the flatpack into the installed version and if so from where to where and with which rights?”

Many thanks in advance.

With kind regards R.Lehmeier

Translated with DeepL.com (free version)

My System :

inxi -Fxxxz
System:
  Kernel: 6.13.6-arch1-1 arch: x86_64 bits: 64 compiler: gcc v: 14.2.1
    clocksource: tsc
  Desktop: KDE Plasma v: 6.3.3 tk: Qt v: N/A wm: kwin_wayland vt: 1 dm: SDDM
    Distro: Arch Linux
Machine:
  Type: Desktop Mobo: Gigabyte model: X670 AORUS ELITE AX v: x.x
    serial: <superuser required> uuid: <superuser required> UEFI: American
    Megatrends LLC. v: F33b date: 02/21/2025
CPU:
  Info: 12-core model: AMD Ryzen 9 7900X bits: 64 type: MT MCP smt: enabled
    arch: Zen 4 rev: 2 cache: L1: 768 KiB L2: 12 MiB L3: 64 MiB
  Speed (MHz): avg: 5151 min/max: 545/5733 boost: enabled cores: 1: 5151
    2: 5151 3: 5151 4: 5151 5: 5151 6: 5151 7: 5151 8: 5151 9: 5151 10: 5151
    11: 5151 12: 5151 13: 5151 14: 5151 15: 5151 16: 5151 17: 5151 18: 5151
    19: 5151 20: 5151 21: 5151 22: 5151 23: 5151 24: 5151 bogomips: 225599
  Flags: 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 31 [Radeon RX 7900 XT/7900
    XTX/7900 GRE/7900M] vendor: Sapphire PULSE driver: amdgpu v: kernel
    arch: RDNA-3 pcie: speed: 16 GT/s lanes: 16 ports: active: DP-1,DP-2
    empty: HDMI-A-1,HDMI-A-2,Writeback-1 bus-ID: 03:00.0 chip-ID: 1002:744c
    class-ID: 0300
  Device-2: Advanced Micro Devices [AMD/ATI] Raphael vendor: Gigabyte
    driver: amdgpu v: kernel arch: RDNA-2 pcie: speed: 16 GT/s lanes: 16 ports:
    active: none empty: DP-3, DP-4, DP-5, HDMI-A-3, Writeback-2
    bus-ID: 17:00.0 chip-ID: 1002:164e class-ID: 0300 temp: 53.0 C
  Device-3: SunplusIT Depstech webcam driver: snd-usb-audio,uvcvideo
    type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 bus-ID: 3-5:2 chip-ID: 1bdf:5050
    class-ID: 0102 serial: <filter>
  Display: wayland server: X.org v: 1.21.1.16 with: Xwayland v: 24.1.6
    compositor: kwin_wayland driver: X: loaded: amdgpu
    unloaded: modesetting,radeon alternate: fbdev,vesa dri: radeonsi
    gpu: amdgpu d-rect: 7680x2160 display-ID: 0
  Monitor-1: DP-1 pos: right model: Samsung U32J59x serial: <filter> res:
    mode: 3840x2160 hz: 60 scale: 175% (1.75) to: 2194x1234 dpi: 140
    size: 697x392mm (27.44x15.43") diag: 800mm (31.5") modes: max: 3840x2160
    min: 720x400
  Monitor-2: DP-2 pos: primary,left model: Samsung U32J59x serial: <filter>
    res: mode: 3840x2160 hz: 60 scale: 175% (1.75) to: 2194x1234 dpi: 140
    size: 697x392mm (27.44x15.43") diag: 800mm (31.5") modes: max: 3840x2160
    min: 720x400
  API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
    device: 1 drv: radeonsi device: 2 drv: swrast gbm: drv: radeonsi
    surfaceless: drv: radeonsi wayland: drv: radeonsi x11: drv: radeonsi
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 25.0.1-arch1.2
    glx-v: 1.4 direct-render: yes renderer: AMD Radeon RX 7900 XT (radeonsi
    navi31 LLVM 19.1.7 DRM 3.61 6.13.6-arch1-1) device-ID: 1002:744c
    display-ID: :1.0
  API: Vulkan v: 1.4.304 layers: 11 surfaces: xcb,xlib,wayland device: 0
    type: discrete-gpu driver: N/A device-ID: 1002:744c device: 1
    type: integrated-gpu driver: N/A device-ID: 1002:164e
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo de: kscreen-console,
    kscreen-doctor, xfce4-display-settings wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
Audio:
  Device-1: Advanced Micro Devices [AMD/ATI] Navi 31 HDMI/DP Audio
    driver: snd_hda_intel v: kernel pcie: speed: 16 GT/s lanes: 16
    bus-ID: 03:00.1 chip-ID: 1002:ab30 class-ID: 0403
  Device-2: Advanced Micro Devices [AMD/ATI] Rembrandt Radeon High
    Definition Audio driver: snd_hda_intel v: kernel pcie: speed: 16 GT/s
    lanes: 16 bus-ID: 17:00.1 chip-ID: 1002:1640 class-ID: 0403
  Device-3: Advanced Micro Devices [AMD] Family 17h/19h/1ah HD Audio
    vendor: Gigabyte driver: snd_hda_intel v: kernel pcie: speed: 16 GT/s
    lanes: 16 bus-ID: 17:00.6 chip-ID: 1022:15e3 class-ID: 0403
  Device-4: SunplusIT Depstech webcam driver: snd-usb-audio,uvcvideo
    type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 bus-ID: 3-5:2 chip-ID: 1bdf:5050
    class-ID: 0102 serial: <filter>
  Device-5: C-Media Audio Adapter (Unitek Y-247A)
    driver: cmedia_hs100b,snd-usb-audio,usbhid type: USB rev: 1.1 speed: 12 Mb/s
    lanes: 1 bus-ID: 9-1.4:6 chip-ID: 0d8c:0014 class-ID: 0300
  API: ALSA v: k6.13.6-arch1-1 status: kernel-api
  Server-1: sndiod v: N/A status: off
  Server-2: PipeWire v: 1.4.1 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    4: pw-jack type: plugin
Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: Gigabyte driver: r8169 v: kernel
    pcie: speed: 5 GT/s lanes: 1 port: e000 bus-ID: 10:00.0 chip-ID: 10ec:8125
    class-ID: 0200
  IF: enp16s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  Device-2: MEDIATEK MT7922 802.11ax PCI Express Wireless Network Adapter
    driver: mt7921e v: kernel pcie: speed: 5 GT/s lanes: 1 bus-ID: 11:00.0
    chip-ID: 14c3:0616 class-ID: 0280
  IF: wlan0 state: down mac: <filter>
Bluetooth:
  Device-1: MediaTek Wireless_Device driver: btusb v: 0.8 type: USB rev: 2.1
    speed: 480 Mb/s lanes: 1 bus-ID: 3-7:4 chip-ID: 0e8d:0616 class-ID: e001
    serial: <filter>
  Report: btmgmt ID: hci0 rfk-id: 0 state: down bt-service: disabled
    rfk-block: hardware: no software: no address: N/A
Drives:
  Local Storage: total: 5.46 TiB used: 1.15 TiB (21.1%)
  ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 990 PRO 2TB size: 1.82 TiB
    speed: 63.2 Gb/s lanes: 4 tech: SSD serial: <filter> fw-rev: 4B2QJXD7
    temp: 40.9 C scheme: GPT
  ID-2: /dev/sda vendor: Western Digital model: WD40EFRX-68N32N0
    size: 3.64 TiB type: USB rev: 3.1 spd: 5 Gb/s lanes: 1 tech: HDD rpm: 5400
    serial: <filter> fw-rev: 1021 scheme: GPT
Partition:
  ID-1: / size: 195.31 GiB used: 56.87 GiB (29.1%) fs: btrfs
    dev: /dev/nvme0n1p2
  ID-2: /boot/efi size: 2 GiB used: 584 KiB (0.0%) fs: vfat
    dev: /dev/nvme0n1p1
  ID-3: /home size: 1.63 TiB used: 1.1 TiB (67.4%) fs: btrfs
    dev: /dev/nvme0n1p3
  ID-4: /var/log size: 195.31 GiB used: 56.87 GiB (29.1%) fs: btrfs
    dev: /dev/nvme0n1p2
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 81.0 C mobo: 38.0 C
  Fan Speeds (rpm): N/A
  GPU: device: amdgpu temp: 53.0 C device: amdgpu temp: 46.0 C mem: 56.0 C
    fan: 0 watts: 31.00
Info:
  Memory: total: 128 GiB note: est. available: 124.91 GiB
    used: 16.64 GiB (13.3%)
  Processes: 570 Power: uptime: 17m states: freeze,mem,disk suspend: deep
    wakeups: 0 hibernate: platform Init: systemd v: 257 default: graphical
  Packages: 2507 pm: pacman pkgs: 2493 pm: flatpak pkgs: 14 Compilers:
    clang: 19.1.7 gcc: 14.2.1 Shell: Bash v: 5.2.37 running-in: yakuake
    inxi: 3.3.37

I can't remember where the flatpack version keeps data. For Linux the default from either a package manager or compiled from source installation is /var/lib/boinc

I tried to find out everything that has to do with Boinc using Catfish. Of course I will not list all files here, there are places like:

/var/lib/pacman/local/archlinux-appstream-data-20250202-1/files

/var/lib/pacman/local/boinc-8.0.2-2/install

/var/lib/flatpak/repo/objects/40/76f2eaabfac0800aa7c15140d8cb403a6bd9f11ef49e19942d6c6007eb9725.file

/var/lib/flatpak/appstream/flathub/x86_64/8000d0a2df37c8b9960d30f33bd288bbe225095ed72fc7d49d6514c35887abbf/appstream.xml

/var/lib/flatpak/runtime/org.freedesktop.Platform/x86_64/23.08/507806048b865751a58580843c9dd77983fea138f268f1fb442474c9d4c46051/files/etc/services

/var/lib/flatpak/runtime/org.gnome.Platform/x86_64/46/cfb8e628b58092ca709a7ea19212ee6718294bc34ace6a208d10129c7110ecd1/files/etc/services

/var/lib/flatpak/runtime/org.kde.Platform/x86_64/5.15-24.08/25b14a26740d8b58b3e27a03dfd3c08cdbdebf58d9ee55222577fe6c9ef1d494/files/etc/services

/var/lib/flatpak/runtime/edu.berkeley.BOINC.Locale/x86_64/stable/e8f9c01477ea580b4780d1f64e7ce8f15373305e749789d477c5f138b81c51d8-de/metadata

/var/lib/flatpak/app/edu.berkeley.BOINC/x86_64/stable/f7b700556b5642bf9842f85b76c4cc2480fb4c8f75f928f0ea71b380dab5e8a1/metadata

/var/lib/boinc/gui_rpc_auth.cfg

/home/ralf/.var/app/edu.berkeley.BOINC/stderrdae.txt

/home/ralf/.var/app/edu.berkeley.BOINC/projects/boinc.bakerlab.org_rosetta/9a_ce1_i_hal_9aa_ce1475_d9_0001.flags

/proc/2264/task/5235/fd/143

/usr/include/boinc/app_ipc.h

/usr/share/boinc-manager/skins/World Community