[chimerax-users] ChimeraX 1.5rc running on Nvidia RTX Titan [ubuntu 22.04]

[Greg Couch]

There is a bug in the instructions for the release candidate, it should 
say to "sudo apt install ~/Downloads/chimerax-rc.deb".  Not 
ucsf-chimerax_1.5+rc2022.11.09ubuntu22.04_amd64.deb.  Does that explain 
the problem you had installing ChimeraX?  If not, I'd like to learn more 
so I can fix it.


ChimeraX does not work well with the open source Nvidia driver on 
Linux.  You need to install the proprietary Nvidia driver.

And make sure the the display cable is plugged into the Nvidia graphics 
card instead of the integrated graphics.  See 
https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux 
for the various ways to choose which Nvidia driver to install on Ubuntu.


Right now there are way too many Nvidia driver to choose from. That is 
because there is a completely open source driver, several combination 
open source and proprietary drivers, and several proprietary drivers 
available.  Today, those choices are a subset of:

> nouveau
> nvidia-driver-390
> nvidia-driver-418-server
> nvidia-driver-450-server
> nvidia-driver-470
> nvidia-driver-470-server
> nvidia-driver-510
> nvidia-driver-510-server
> nvidia-driver-515
> nvidia-driver-515-open
> nvidia-driver-515-server
> nvidia-driver-520
> nvidia-driver-520-open
Your exact choices depend on your graphics card.  Stay way from the 
nouveau, -open, and -server versions.  We're using the 470 driver on a 
GeForce RTX 3070.  The 515 and 520 versions didn't work correctly with 
ChimeraX when we made our choice months ago. I expect that has changed 
and that the 515 and 520 drivers are fine now, but maybe not.  Within a 
year, I expect that the -open drivers will completely replace the 
non-open ones, but that time is not now.


     -- Greg


On 11/11/2022 5:40 AM, HONG ZHAN via ChimeraX-users wrote:
> Dear,
>
> I recently installed a Nvidia RTX Titan GPU card, and ChimeraX 1.5rc, 
> it is a bit wired. I can open the window using intergrated GPU but if 
> I just clicked on Chimerax or try to open it in terminal, it failed to 
> open the program...
>
> Is ChimeraX only working on integrated GPU? Also, I cannot install the 
> chimerax using apt install as in the website description, but dpkg -i 
> works... is this the right way to install?
>
> many thanks!
> Hong
>
>
>
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