[R-sig-Fedora] rgl.snapshot only captures a small portion what's visible in the RGL device window on CentOS 7

[Wittner, Ben, Ph.D.]

Tom,

> Okay. I do "official" package builds of R for RHEL/CentOS as part of the EPEL repository:

> https://fedoraproject.org/wiki/EPEL

> If its not painful for you to do so, testing my packages vs yours just to rule out misconfiguration in R would be
> helpful. I don't think this is likely, but I'm being thorough.

I've now tried the EPEL version of R and it still has the problem.

> Okay. Nouveau is _not_ the NVIDIA driver, that's the open source driver provided by the Linux kernel.
> It is possible this is a bug in nouveau.
> You may want to try to install the NVIDIA driver and see if it resolves your issue:

> http://www.nvidia.com/object/unix.html

I started trying to do this, but I'm stuck.
I started with http://us.download.nvidia.com/XFree86/Linux-x86_64/340.96/README/installdriver.html , which led me to http://us.download.nvidia.com/XFree86/Linux-x86_64/340.96/README/commonproblems.html#nouveau . I created /etc/modprobe.d/disable-nouveau.conf as instructed then rebooted, but the nvidia installer found the nouveau driver running anyway, so it wrote two more .conf files (one in /usr/lib/modproe.d and the other in /etc/modeprobe.d) and then halted. I rebooted and tried the installer again, but again it noticed the nouveau driver running.
I suspect this is because the initial ramdisk image contains Nouveau because, even though I've done systemctl set-default multi-user.target, during boot I still see something that looks like a graphical screen display for a while before it drops back to a text mode to display the login prompt.
So, following the instructions, I tried to rebuild the initial ramdisk image. The nvidia documentation does not say how to do that, so I Googled and found https://wiki.centos.org/TipsAndTricks/CreateNewInitrd , which unfortunately gives instructions only for CentOS 5 and CentOS 6, but not CentOS 7. I'm afraid to do the wrong thing, so I'm stuck.
Any suggestions would be appreciated.

Thanks.

-Ben




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