Not starting on manjaro

[O1ez]

I have the problem that the program won´t run on manjaro. I tried installing from the software center, via pacman and via pip. It is the same everywhere. There appear multiple issue windows when I try to start it. Here is a picture for it since I can´t copy the code out of the windows. They all say the same:
https://imgur.com/a/mzx4ok4

[O1ez]

Oh and I also tried on multiple devices. It is the same everywhere

[p5k369]

Hey @O1ez if you want us to help you we need to know exactly what you are doing (like console input and output). Also note that we can only provide little to none support for distribution specific packages atm.

[ignace72]

Hello, @O1ez.
As @p5k369 says, we need additional information.
There are three ways to install DisplayCAL in Python 3 on Manjaro Linux.
With the Manjaro package, with the method described in the README.md file with pip and Python virtual environment and with “pip install displaycal”.

[mizzack]

Seeing this as well using the 3.9.10-1 AUR package (https://archlinux.org/packages/community/x86_64/displaycal/) and Python 3.10.9

┌──────────────────────────────────────────────────────────────────────────────┐
│ Traceback (most recent call last):                                           │
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 2346, in Notify  │
│     self.notify()                                                            │
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3552, in Notify  │
│     self.result = self.callable(*self.args, **self.kwargs)                   │
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/display_cal.py", line   │
│ 19425, in startup                                                            │
│     self.timeout = wx.CallLater(20000, self.worker.abort_subprocess)         │
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3471, in         │
│ __init__                                                                     │
│     self.Start()                                                             │
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3492, in Start   │
│     self.timer.Start(self.millis, wx.TIMER_ONE_SHOT)                         │
│ wx._core.wxAssertionError: C++ assertion "wxThread::IsMain()" failed at      │
│ /usr/src/debug/wxwidgets/wxWidgets-3.2.1/src/common/timerimpl.cpp(56) in     │
│ Start(): timer can only be started from the main thread                      │
└──────────────────────────────────────────────────────────────────────────────┘

[ignace72]

Hello, mizzack.
I can't reproduce your error.
I'm on Manjaro Linux.

[mizzack]

I have another PC running the same versions of Python, Manjaro, and DisplayCAL and it works there. Comparing the startup logs, the only difference I could see is that the working instance shows Audio module: wx 4.2.0 and the non-working instance shows Audio module: pyglet 2.0.2.

Not sure why those would be different.

Anyway, to see if the audio system had something to do with the crash, I added startup_sound.enable = 0 to DisplayCAL.ini and it now works. I'll report back if I have any other issues.

[O1ez]

Anyway, to see if the audio system had something to do with the crash, I added startup_sound.enable = 0 to DisplayCAL.ini and it now works. I'll report back if I have any other issues.

This fixes it so I can start the program now but when I start a measurement after a short while this error comes up:

│ Traceback (most recent call last):                                           │  
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3427, in         │  
│ <lambda>                                                                     │  
│     lambda event: event.callable(*event.args, **event.kw) )                  │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/worker.py", line 12921, │  
│ in parse                                                                     │  
│     self.check_instrument_place_on_screen(txt)                               │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/worker.py", line 3293,  │  
│ in check_instrument_place_on_screen                                          │  
│     wx.CallLater(1500, self.instrument_on_screen_continue)                   │  
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3471, in         │  
│ __init__                                                                     │  
│     self.Start()                                                             │  
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3492, in Start   │  
│     self.timer.Start(self.millis, wx.TIMER_ONE_SHOT)                         │  
│ wx._core.wxAssertionError: C++ assertion "wxThread::IsMain()" failed at      │  
│ /usr/src/debug/wxwidgets/wxWidgets-3.2.2.1/src/common/timerimpl.cpp(56) in   │  
│ Start(): timer can only be started from the main thread        

Looks to me very similar to the original one so maybe it tries to play a sound there too?
I can click "start measurement" again afterwards and it will measure without problems. When I click "continue on to calibration" however this error comes up:

│ Traceback (most recent call last):                                           │  
│   File "/usr/lib/python3.10/site-packages/wx/core.py", line 3427, in         │  
│ <lambda>                                                                     │  
│     lambda event: event.callable(*event.args, **event.kw) )                  │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/worker.py", line 14917, │  
│ in swap_progress_wnds                                                        │  
│     self.progress_dlg_start(title, "", parent, self.resume, self.fancy)      │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/worker.py", line 14242, │  
│ in progress_dlg_start                                                        │  
│     self._progress_dlgs[key] = ProgressDialog(                               │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/wxwindows.py", line     │  
│ 6167, in __init__                                                            │  
│     self.gauge = BetterPyGauge(                                              │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/wxwindows.py", line     │  
│ 5294, in __init__                                                            │  
│     self.Start()                                                             │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/wxwindows.py", line     │  
│ 5410, in Start                                                               │  
│     self._timer.Start(milliseconds)                                          │  
│ wx._core.wxAssertionError: C++ assertion "wxThread::IsMain()" failed at      │  
│ /usr/src/debug/wxwidgets/wxWidgets-3.2.2.1/src/common/timerimpl.cpp(56) in   │  
│ Start(): timer can only be started from the main thread                      │  

and afterward this error multiple times per second:

│ Traceback (most recent call last):                                           │  
│   File "/usr/lib/python3.10/site-packages/DisplayCAL/wxwindows.py", line     │  
│ 5363, in OnTimer                                                             │  
│     self._barGradient = [self._gradients[self.gradientindex]]                │  
│ IndexError: list index out of range                                          │  

My wxpython is on the newest version.

[eoyilmaz]

hey @O1ez can you try installing DisplayCAL from the development branch as explained in the README. Let's be sure that you can produce this with our latest development version.

[Mister-Teatime]

I'm on Manjaro (and having a different issue, #249, but it starts without problems). Maybe the following is useful, since the issue seems to be related to the GUI:

I installed all packages to do with DisplayCal (all 7 of them, all version 3.9.10-1), and I have wxwidgets-common and wxwidgets-gtk3 installed (both from the "extra" Manjaro repo, both version 3.2.2.1-1), and python-wxpython 1:4.2.0-3

Sometimes things fail on Manjaro because some package from an AUR repository is interfering. If Python is involved, there are also possible issues if you installed one of the relevant Python libraries via pip and not via pamac -- they might install a different version, and suddenly something's no longer compatible. Worse yet: Pip can overwrite files from packages you installed via pamac, and then you have an incompatible verison of some Python module without an easy way to spot it after the fact.

==> You could try to remove all of DisplayCal, WXwidgets and wxpython, and install them fresh, from Pamac (or Octopi, or whatever you prefer to use for Manjaro packages), while ignoring AUR repositories.

[ignace72]

Hello to all and you, Mister-Teatime.
To avoid breaking everything with pip as you explain, it is better to never use pip with sudo.

[eoyilmaz]

Yes, please use a virtual environment to install DisplayCAL and not make your system python dirty... closing this issue then.

[papoteur-mga]

We got the same error in Mageia 9.

displaycal
Acquired lock file: <DisplayCAL.main.AppLock object at 0x7f451bec7910>
displaycal 3.9.11 2023-06-05T17:07:58Z
mageia 9 mga9 x86_64
Python 3.10.11 (main, Apr 16 2023, 03:21:15) [GCC 12.2.1 20230415]
Faulthandler 
wxPython 4.2.0 gtk3 (phoenix) wxWidgets 3.2.1
Encoding: utf-8
File system encoding: utf-8

[papoteur-mga]

The error occurs when using pyglet for sound. When installing SDL2 lib, there is no problem.