= ChimeraX Developer Meeting =

Attendance: Greg, Zach, Tom, Eric

July 21, 2025

= Agenda =

* ChimeraX 1.10.1 patch release
  - Segmentations toolbar bad import #17662
  - Windows 1.10 build has 640 MB of unused Nvidia drivers from OpenMM #17970
  - Linux 1.10 missing openmm cuda support #17970
  - 1.10 still asking to re-register, #18133
  - Session restore error #18140, lz4 4.4 problem
  - ffmpeg execute permission on mac, #18177
  - profile grid crash on Windows
* Updating prereqs.
* Switch from !PyQt to !PySide?
* ViewDockX port to Qt
* Inside ribbon color?
* Work in progress reports
* Make Chimera end-of-life bug report and registration changes.
* Back up the Chimera build machine to a solid state drive, Windows 7.
* Linux ARM64 release and download page

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= Discussion =

* ChimeraX 1.10.1 patch release
  - profile grid crashing on Windows, got bug report today.  Eric reproduced it.  Will try to fix for 1.10.1.
  - Tristan notes OpenMM in Linux ChimeraX 1.10 does not support CUDA, needs openmm-cuda-12 package.  Need to check if that needs huge nvidia libraries.
  - Discuss on Thursday if 1.10.1 release is ready.
  - Zach started release candidate preview build today.

* Switch !PyQt to !PySide?
  - Need to switch soon if we hope to use it in December ChimeraX release.
  - We will make tech-preview version with !PySide for us to try.  Then we can put it in daily build if works ok.
  - Tom says he will but Boltz 2 affinity prediction in daily build and announce.  Don't want hundreds of PySide downloads if it is broken in some way.

* Update Python
  - Greg will update to Python 3.11.x latest patch with binaries available.

* Update prereqs
  - We will update ChimeraX prereqs after 1.10.1 release is out.
  - Leave numpy at v1 instead of v2 since we will try !PySide and don't want too many update problems going on at the same time.

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= Action Items =