From: Stefan Boresch (
Date: Tue Nov 17 2020 - 14:57:25 CST

Hi John, hi Christopher,

thanks for the replies -- I have passed on your messages.

As to Linux, yes I have seen this, too, on machines I 'screwed up'
myself, so I eventually figured out how to fix them, but Windows is
relatively unknown territory to me.

Best regards,

Stefan (Boresch)

On Tue, Nov 17, 2020 at 11:00:06AM -0600, John Stone wrote:
> Hi,
> A CUDA driver mismatch warning indicates that the GPU system software
> on the computer in question is either too old, or inconsistent and
> not functioning correctly. That said, VMD should NOT be terminating
> as a result of the condition indicated by this message, it should
> continue running, but with all of the CUDA features of the program disabled.
> In all of the cases I'm familiar with so far, VMD continues running
> with CUDA disabled as I describe, this system seems to be an outlier
> in that respect, and I'm not sure what could cause the crash except that
> there may also be problems with the OpenGL graphics drivers. Unlike
> CUDA, OpenGL is required and not optional, and if there are problems
> with the OpenGL graphics drivers, that could indeed cause a crash.
> I would suggest that the owner of the laptop try and update their
> GPU graphics driver to current software and then run basic OpenGL
> software tests to verify that it is working correctly before
> trying to run VMD again. If you can put the student in direct
> contact with me, I'm happy to try and walk them through this.
> Best regards,
> John Stone
> On Tue, Nov 17, 2020 at 10:39:20AM +0100, Stefan Boresch wrote:
> > Hi,
> >
> > on the odd chance that someone has an idea:
> >
> > I am presently running a course in which I use VMD a bit, and students are
> > expected to install it on their own hardware. This has worked well so
> > far, on Linux, Mac and Windows, with here in Europe Win10 being the
> > dominating OS.
> >
> > Yesterday I got a 'plea for help' from one student saying
> > that suddently VMD is not starting up anymore on her Win10 laptop, though
> > it worked before. I got some screenshots; the terminal window comes
> > up, prints
> >
> > "mismatch between CUDA runtime and GPU driver"
> >
> > and terminates. Restarting the machine, reinstalling VMD (both 1.9.3 and
> > the new 1.9.4alpha) apparently has not helped. Since this isn't my
> > hardware and since I don't have access to it because of the lockdown, this
> > is all the info I have.
> >
> > I normally run VMD on my Linux workstation, though I also have it on a Win10
> > laptop, with an NVIDIA card and all updates installed, where both vmd 1.9.3
> > and 1.9.4alpha run fine.
> >
> > The one observation I can add from my own experience is that for me (on the
> > Win10/Nvidia laptop) VMD comes up, but hangs for a while (the main menu
> > is not operational, up to minutes). Hitting Enter or Ctrl-C in the terminal
> > window usually helps.
> >
> > Any hints / suggestions to pass on welome, best regards,
> >
> > Stefan
> --
> NIH Center for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> Phone: 217-244-3349