Q Light Controller+

Hello, I have a problem with Linux Mint 21 Vanessa.
QLC+ can be installed but does not start.
AMD Radeon Ryzen 5000 Lenovo Laptop

We need some more information to try to help in any way.

Open a terminal window, and start QLC from the commandline. See if it prints anything to the terminal.

If it doesn't, try running it in debug mode ( -d option). That will produce a lot more text messages and hopefully show better where or why it fails.

Copypaste any useful output and attach that here, as a file or pastebin link, or if it's not an awful lot, inline in your message.

Thanks edogawa

qlcplus: error while loading shared libraries: libfftw3.so.3: cannot open shared object file: No such file or directory

System:
Kernel: 5.15.0-47-generic x86_64 bits: 64 compiler: gcc v: 11.2.0 Desktop: Cinnamon 5.4.12
tk: GTK 3.24.33 wm: Mutter dm: LightDM Distro: Linux Mint 21 Vanessa base: Ubuntu 22.04 jammy
Machine:
Type: Laptop System: LENOVO product: 82KD v: Lenovo V15 G2 ALC serial: <superuser required>
Chassis: type: 10 v: Lenovo V15 G2 ALC serial: <superuser required>
Mobo: LENOVO model: LNVNB161216 v: NO DPK serial: <superuser required> UEFI: LENOVO
v: GLCN40WW date: 07/23/2021
Battery:
ID-1: BAT0 charge: 38.2 Wh (98.2%) condition: 38.9/38.0 Wh (102.4%) volts: 8.4 min: 7.7
model: SMP L20M2PF0 serial: <filter> status: Discharging
CPU:
Info: quad core model: AMD Ryzen 3 5300U with Radeon Graphics bits: 64 type: MT MCP arch: Zen 2
rev: 1 cache: L1: 256 KiB L2: 2 MiB L3: 4 MiB
Speed (MHz): avg: 1873 high: 2595 min/max: 400/3900 boost: enabled cores: 1: 2595 2: 2595
3: 1153 4: 1153 5: 2595 6: 2595 7: 1153 8: 1152 bogomips: 41524
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm

I think that libfftw3 library is not installed on your system. Take a look to this.
https://linux-packages.com/linux-mint-2 ... libfftw3-3

same message after installing libfftw3-3

qlcplus: error while loading shared libraries:
libfftw3.so.3: cannot open shared object file: No such file or directory

Try in terminal: Here in openSUSE I get:

Install libfftw3-double3 this package provides libfftw3.so.3 on Ubuntu, I think in Linux Mint is the same.