Blank Qt GUI after deiconifying on Mac

[goddard@…]

The following bug report has been submitted:
Platform:        macOS-13.2.1-arm64-arm-64bit
ChimeraX Version: 1.6.dev202302100235 (2023-02-10 02:35:09 UTC)
Description
After iconifying and uniconifying ChimeraX on Mac about half the time all Qt gui panels are blank.  No doubt this is a Qt bug.  Hopefully fixed in a coming release of Qt.  Resizing the ChimeraX window fixes it.

Log:
UCSF ChimeraX version: 1.6.dev202302100235 (2023-02-10)  
© 2016-2023 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open /Users/goddard/Desktop/t4.py

> close session

Opened 1a0m.ccp4 as #1, grid size 97,101,88, pixel 0.37,0.37,0.367, shown at
level 1.05, step 1, values float32  
1a0m title:  
1.1 angstrom crystal structure of A-conotoxin [TYR15]-epi [more info...]  
  
Chain information for 1a0m #2  
---  
Chain | Description | UniProt  
A B | α-conotoxin [TYR15]-epi | CXA1_CONEP 1-16  
  
Non-standard residues in 1a0m #2  
---  
NH2 — amino group  
  
executed t4.py  

> close

> open /Users/goddard/Desktop/t5.py

> close session

Opened 1a0m.ccp4 as #1, grid size 97,101,88, pixel 0.37,0.37,0.367, shown at
level 1.05, step 1, values float32  
1a0m title:  
1.1 angstrom crystal structure of A-conotoxin [TYR15]-epi [more info...]  
  
Chain information for 1a0m #2  
---  
Chain | Description | UniProt  
A B | α-conotoxin [TYR15]-epi | CXA1_CONEP 1-16  
  
Non-standard residues in 1a0m #2  
---  
NH2 — amino group  
  
executed t5.py  




OpenGL version: 4.1 Metal - 83
OpenGL renderer: Apple M1 Max
OpenGL vendor: Apple

Python: 3.9.11
Locale: UTF-8
Qt version: PyQt6 6.4.2, Qt 6.4.2
Qt runtime version: 6.4.2
Qt platform: cocoa
Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro18,2
      Model Number: MK1H3LL/A
      Chip: Apple M1 Max
      Total Number of Cores: 10 (8 performance and 2 efficiency)
      Memory: 32 GB
      System Firmware Version: 8419.80.7
      OS Loader Version: 8419.80.7

Software:

    System Software Overview:

      System Version: macOS 13.2.1 (22D68)
      Kernel Version: Darwin 22.3.0
      Time since boot: 10 days, 6 hours, 44 minutes

Graphics/Displays:

    Apple M1 Max:

      Chipset Model: Apple M1 Max
      Type: GPU
      Bus: Built-In
      Total Number of Cores: 32
      Vendor: Apple (0x106b)
      Metal Support: Metal 3
      Displays:
        Color LCD:
          Display Type: Built-in Liquid Retina XDR Display
          Resolution: 3456 x 2234 Retina
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: No
          Connection Type: Internal


Installed Packages:
    alabaster: 0.7.13
    appdirs: 1.4.4
    appnope: 0.1.3
    asttokens: 2.2.1
    Babel: 2.11.0
    backcall: 0.2.0
    beautifulsoup4: 4.11.2
    blockdiag: 3.0.0
    build: 0.10.0
    certifi: 2021.10.8
    cftime: 1.6.2
    charset-normalizer: 3.0.1
    ChimeraX-AddCharge: 1.5.8
    ChimeraX-AddH: 2.2.3
    ChimeraX-AlignmentAlgorithms: 2.0.1
    ChimeraX-AlignmentHdrs: 3.3.1
    ChimeraX-AlignmentMatrices: 2.1
    ChimeraX-Alignments: 2.9
    ChimeraX-AlphaFold: 1.0
    ChimeraX-AltlocExplorer: 1.0.3
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Arrays: 1.1
    ChimeraX-Atomic: 1.43.7
    ChimeraX-AtomicLibrary: 10.0.3
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.3.2
    ChimeraX-BasicActions: 1.1.2
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 2.1.2
    ChimeraX-BondRot: 2.0.1
    ChimeraX-BugReporter: 1.0.1
    ChimeraX-BuildStructure: 2.8
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.2.1
    ChimeraX-ButtonPanel: 1.0.1
    ChimeraX-CageBuilder: 1.0.1
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.3.2
    ChimeraX-ChangeChains: 1.0.2
    ChimeraX-CheckWaters: 1.3.1
    ChimeraX-ChemGroup: 2.0.1
    ChimeraX-Clashes: 2.2.4
    ChimeraX-ColorActions: 1.0.3
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.3
    ChimeraX-CommandLine: 1.2.5
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0.1
    ChimeraX-Core: 1.6.dev202302100235
    ChimeraX-CoreFormats: 1.1
    ChimeraX-coulombic: 1.4.2
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0.1
    ChimeraX-DataFormats: 1.2.3
    ChimeraX-Dicom: 1.1
    ChimeraX-DistMonitor: 1.3.3
    ChimeraX-DockPrep: 1.1
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ESMFold: 1.0
    ChimeraX-ExperimentalCommands: 1.0
    ChimeraX-FileHistory: 1.0.1
    ChimeraX-FunctionKey: 1.0.1
    ChimeraX-Geometry: 1.3
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.1.1
    ChimeraX-Hbonds: 2.4
    ChimeraX-Help: 1.2.1
    ChimeraX-HKCage: 1.3
    ChimeraX-IHM: 1.1
    ChimeraX-ImageFormats: 1.2
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.1
    ChimeraX-ItemsInspection: 1.0.1
    ChimeraX-Label: 1.1.7
    ChimeraX-ListInfo: 1.1.1
    ChimeraX-Log: 1.1.5
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.8.2
    ChimeraX-Map: 1.1.4
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0.1
    ChimeraX-MapFilter: 2.0.1
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.1.1
    ChimeraX-Markers: 1.0.1
    ChimeraX-Mask: 1.0.2
    ChimeraX-MatchMaker: 2.0.11
    ChimeraX-MDcrds: 2.6
    ChimeraX-MedicalToolbar: 1.0.2
    ChimeraX-Meeting: 1.0.1
    ChimeraX-MLP: 1.1.1
    ChimeraX-mmCIF: 2.11
    ChimeraX-MMTF: 2.2
    ChimeraX-Modeller: 1.5.8
    ChimeraX-ModelPanel: 1.3.6
    ChimeraX-ModelSeries: 1.0.1
    ChimeraX-Mol2: 2.0
    ChimeraX-Mole: 1.0
    ChimeraX-Morph: 1.0.2
    ChimeraX-MouseModes: 1.2
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0.3
    ChimeraX-OpenCommand: 1.10.1
    ChimeraX-PDB: 2.6.13
    ChimeraX-PDBBio: 1.0
    ChimeraX-PDBLibrary: 1.0.2
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0.1
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.1
    ChimeraX-PubChem: 2.1
    ChimeraX-ReadPbonds: 1.0.1
    ChimeraX-Registration: 1.1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-RenderByAttr: 1.0
    ChimeraX-RenumberResidues: 1.1
    ChimeraX-ResidueFit: 1.0.1
    ChimeraX-RestServer: 1.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 3.0
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.5.1
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0.1
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0.1
    ChimeraX-SelInspector: 1.0
    ChimeraX-SeqView: 2.8.1
    ChimeraX-Shape: 1.0.1
    ChimeraX-Shell: 1.0.1
    ChimeraX-Shortcuts: 1.1.1
    ChimeraX-ShowSequences: 1.0.1
    ChimeraX-SideView: 1.0.1
    ChimeraX-Smiles: 2.1
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.10.1
    ChimeraX-STL: 1.0.1
    ChimeraX-Storm: 1.0
    ChimeraX-StructMeasure: 1.1.1
    ChimeraX-Struts: 1.0.1
    ChimeraX-Surface: 1.0.1
    ChimeraX-SwapAA: 2.0.1
    ChimeraX-SwapRes: 2.2.1
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.1.2
    ChimeraX-ToolshedUtils: 1.2.1
    ChimeraX-Topography: 1.0
    ChimeraX-ToQuest: 1.0
    ChimeraX-Tug: 1.0.1
    ChimeraX-UI: 1.27
    ChimeraX-uniprot: 2.2.2
    ChimeraX-UnitCell: 1.0.1
    ChimeraX-ViewDockX: 1.2
    ChimeraX-VIPERdb: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0.1
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0.2
    ChimeraX-WebServices: 1.1.1
    ChimeraX-Zone: 1.0.1
    colorama: 0.4.6
    comm: 0.1.2
    contourpy: 1.0.7
    cxservices: 1.2.2
    cycler: 0.11.0
    Cython: 0.29.33
    debugpy: 1.6.6
    decorator: 5.1.1
    docutils: 0.19
    executing: 1.2.0
    filelock: 3.9.0
    fonttools: 4.38.0
    funcparserlib: 1.0.1
    grako: 3.16.5
    h5py: 3.8.0
    html2text: 2020.1.16
    idna: 3.4
    ihm: 0.35
    imagecodecs: 2022.2.22
    imagesize: 1.4.1
    importlib-metadata: 6.0.0
    ipykernel: 6.21.1
    ipython: 8.9.0
    ipython-genutils: 0.2.0
    ipywidgets: 8.0.4
    jedi: 0.18.2
    Jinja2: 3.1.2
    jupyter-client: 8.0.2
    jupyter-core: 5.2.0
    jupyterlab-widgets: 3.0.5
    kiwisolver: 1.4.4
    line-profiler: 4.0.2
    lxml: 4.9.2
    lz4: 4.3.2
    MarkupSafe: 2.1.2
    matplotlib: 3.6.3
    matplotlib-inline: 0.1.6
    msgpack: 1.0.4
    nest-asyncio: 1.5.6
    netCDF4: 1.6.2
    networkx: 2.8.8
    numexpr: 2.8.4
    numpy: 1.23.5
    openvr: 1.23.701
    packaging: 21.3
    pandas: 1.5.3
    ParmEd: 3.4.3
    parso: 0.8.3
    pep517: 0.13.0
    pexpect: 4.8.0
    pickleshare: 0.7.5
    Pillow: 9.3.0
    pip: 23.0
    pkginfo: 1.9.6
    platformdirs: 3.0.0
    prompt-toolkit: 3.0.36
    psutil: 5.9.4
    ptyprocess: 0.7.0
    pure-eval: 0.2.2
    pycollada: 0.7.2
    pydicom: 2.3.0
    Pygments: 2.14.0
    PyOpenGL: 3.1.5
    PyOpenGL-accelerate: 3.1.5
    pyparsing: 3.0.9
    pyproject-hooks: 1.0.0
    PyQt6: 6.4.2
    PyQt6-Qt6: 6.4.2
    PyQt6-sip: 13.4.1
    PyQt6-WebEngine: 6.4.0
    PyQt6-WebEngine-Qt6: 6.4.2
    python-dateutil: 2.8.2
    pytz: 2022.7.1
    pyzmq: 25.0.0
    qtconsole: 5.4.0
    QtPy: 2.3.0
    RandomWords: 0.4.0
    requests: 2.28.2
    scipy: 1.9.3
    setuptools: 65.1.1
    setuptools-scm: 7.0.5
    sfftk-rw: 0.7.3
    six: 1.16.0
    snowballstemmer: 2.2.0
    sortedcontainers: 2.4.0
    soupsieve: 2.3.2.post1
    sphinx: 6.1.3
    sphinx-autodoc-typehints: 1.22
    sphinxcontrib-applehelp: 1.0.4
    sphinxcontrib-blockdiag: 3.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 2.0.1
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.5
    stack-data: 0.6.2
    tables: 3.7.0
    tcia-utils: 1.0.2
    tifffile: 2022.10.10
    tinyarray: 1.2.4
    tomli: 2.0.1
    tornado: 6.2
    traitlets: 5.9.0
    typing-extensions: 4.4.0
    urllib3: 1.26.14
    wcwidth: 0.2.6
    webcolors: 1.12
    wheel: 0.38.4
    wheel-filename: 1.4.1
    widgetsnbextension: 4.0.5
    zipp: 3.13.0

[Tom Goddard]

Retest this on the next Qt update.

[Greg Couch]

Look at the release notes for Qt 6.4.3 at ​https://code.qt.io/cgit/qt/qtreleasenotes.git/about/qt/6.4.3/release-note.md. PyQt6-Qt6 6.4.3 was just released. We're currently using 6.4.2. Could still get into 1.6 :-)

[goddard@…]

I think the blank gui is annoying and frequent and some users will not figure out how to work around it.  So we should update to Qt 6.4.3 for 1.6.

[Greg Couch]

The daily build has been updated to Qt 6.4.3. Please retest.

[Tom Goddard]

The Qt panes are all blank every other time the app is deiconified on Mac. Every other time it draws correctly. If file history thumbnails are shown it always draws correctly. With graphics pane shown it does not need any models opened. Commenting out redraw of graphics in the code, it still leaves Qt panes blank every other deiconify. So it does not appear to be related to the ChimeraX OpenGL context since that is never made current when graphics drawing is commented out.

[Tom Goddard]

I tried commenting out the exposeEvent() and resizeEvent() handler on the graphics pane and the bug persists.

[Tom Goddard]

Fixed in 1.6 and daily builds.

Commenting out the graphics window event() handler method showed that the trouble is caused by the check_opengl() method that checks that the needed version of OpenGL is available when the graphics window is shown. It makes our ChimeraX OpenGL context current and did not restore the previous OpenGL context. Apparently a change in Qt 6.4 or 6.3 made it assume that the event() handler routine does not change which context is current.

[Tom Goddard]

Also made opengl check only check first time graphics window is shown.