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Old 06-22-03, 10:54 AM   #2
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Join Date: Sep 2002
Posts: 2,262

Somebody over at had the same issue a while back (I found it by searching Google for your error, incidentally... ), and they solved it by compiling the driver under their kernel.

Were you running the same kernel when you ran the installer, as you were running when you got this error? If so, then this (probably) isn't the problem...

There is also a reference to this error in the FreeBSD readme:

Q: X crashes during `startx`, and my XFree86.0.log file contains this
error message:

(EE) NVIDIA(0): Failed to obtain a shared memory identifier.

A: The NVIDIA OpenGL driver and the NVIDIA X driver require shared memory
to communicate; you must have:

a) SYSVSHM built into your kernel
b) XFree86-Server-4.2.1_3 or later

Downloading XFree86 4.2.1 from the XFree86 ftpsite is not sufficient;
a shared memory bug in XFree86 was fixed between 4.2.1 and
The version numbers on X probably don't matter for Linux (and you're using 4.3.0 anyway).

However, you will NEED to have SysV Shared Memory Support turned on in your kernel, and you'll also need to have /dev/shm mounted. If you compiled the kernel yourself, then the first might be the problem. If you're using a distro kernel, then the second might be it.

To check the second, do an ls /dev/shm. If nothing comes back, then at least you have the directory. If you get "/dev/shm: file not found", then do a mkdir /dev/shm to create it.

After that, do a grep "/dev/shm" /proc/mounts, and make sure something gets printed. If nothing does, then you don't have /dev/shm mounted at all, and you should do a mount -t tmpfs devshm /dev/shm (the "devshm" can be anything; I use this name so I remember what it is, but some distros use "none", and others use something else). After you've done that, you should have shared memory support, so try to start X up again (but don't reboot; just do a startx).

If that helps, then add a line to your /etc/fstab that looks like:

devshm /dev/shm tmpfs defaults 0 0

or something similar (again, "devshm" can be anything). Next time you reboot, /dev/shm should get mounted automatically.
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