QML component error in 0.9.2

[gyps]

Dear all,

today I rebuild projecteur 0.9.2 on my guix system. About a month ago everything worked fine but now the newly build program complains

[err][projecteur.mainapp] Overlay window error. ; Qml component has status '3'. Exiting.

It definitively has to do with changes on my system, but I have no clue what to look for. All qt packages seem to be in version 5.15.2 (I have no idea what version they were when it still worked).

guix package --list-installed | grep qt
qtbase                  5.15.2                  out /gnu/store/3ag62qr53br83x0p0739xdhshd3km7yk-qtbase-5.15.2
qtdeclarative           5.15.2                  out /gnu/store/49rn4wjbwaagb8hr6rgdgwdm6bbdab6x-qtdeclarative-5.15.2
qtx11extras             5.15.2                  out /gnu/store/vsdx1mp5fp8ngqa4flm2vfpi723wj6q8-qtx11extras-5.15.2
qtgraphicaleffects      5.15.2                  out /gnu/store/22jq16rmk7rj5yi9sr01m9nic94k1jdp-qtgraphicaleffects-5.15.2
qtquickcontrols2        5.15.2                  out /gnu/store/yw5fj3hjdv9wg8wr2ax4rgh8xslwf1p5-qtquickcontrols2-5.15.2

Any idea? Thanks, Alex

[jahnf]

Hi Alex this sounds familiar. Are you building against the the same Qt version? (E.g. against 6 instead of 5?) But I can only check on my system from Monday on.

[gyps]

I tried both. First qtbase was in version 6 but then I forced it be be 5 on my whole system (as can be seen in the previous post). I'll check if it was really linked against the right version of the library.

[jahnf]

You can also see the compile and runtime versions used with projecteur -f on the command line.

[gyps]

OK, I've done that but the result is strange.

$ projecteur -f
Projecteur 0.9.2
  - git-branch: master
  - git-hash: 82d9cfac1082a5cf28debb79a7be732fabf4dfd4
  - compiler: GNU 10.3.0
  - qt-version: (build: 5.15.2, runtime: 5.15.2)
  - device-scan: (errors: 0, devices: 1 [readable: 1, writable: 1])

Then I tried projecteur in my current generation of my system

$ projecteur 
[2022-01-10T10:51:22.073][inf][projecteur.virtualdevice] Created uinput device: /sys/devices/virtual/input/input55
[2022-01-10T10:51:22.238][inf][projecteur.device] Connected device: Logitech Spotlight (USB) (046d:c53e)
^C

and it starts up perfectly fine. Why didn't it work the last time?????

Next I switched back to the generation it didn't work in and tried the same:

$ guix package --switch-generation=178
switched from generation 184 to 178
$ projecteur -f
Projecteur 0.9.2
  - git-branch: master
  - git-hash: 82d9cfac1082a5cf28debb79a7be732fabf4dfd4
  - compiler: GNU 10.3.0
  - qt-version: (build: 5.15.2, runtime: 5.15.2)
  - device-scan: (errors: 0, devices: 1 [readable: 1, writable: 1])
$ projecteur 
[2022-01-10T10:52:50.729][inf][projecteur.virtualdevice] Created uinput device: /sys/devices/virtual/input/input56
[2022-01-10T10:52:50.809][err][projecteur.mainapp] Overlay window error. ; Qml component has status '3'. Exiting.
[2022-01-10T10:52:50.877][inf][projecteur.device] Connected device: Logitech Spotlight (USB) (046d:c53e)

There seems to be no difference. Very strange!

[jahnf]

I'm not sure exactly what you refer to as 'generation' - but with builds a lot of times it is best to throw away the build directory and create a new one to make sure no CMake cache variable has unintended side effects.

[jahnf]

closing this for now