Comment 8 for bug 1803275

Try and push this along.
Is this a packaging error ? As the Xorg file indicates:
4.976] (==) ModulePath set to "/usr/lib/xorg/modules"

However, the nvidia directive does not exist there:
sysop@x1904:~$ ls -al /usr/lib/xorg/modules
total 864
drwxr-xr-x 5 root root 4096 Nov 14 23:26 .
drwxr-xr-x 3 root root 4096 Nov 14 23:26 ..
drwxr-xr-x 2 root root 4096 Nov 22 17:40 drivers
drwxr-xr-x 2 root root 4096 Nov 14 23:26 extensions
drwxr-xr-x 2 root root 4096 Oct 16 23:44 input
-rw-r--r-- 1 root root 101040 Oct 25 09:53 libexa.so
-rw-r--r-- 1 root root 22792 Oct 25 09:53 libfbdevhw.so
-rw-r--r-- 1 root root 109360 Oct 25 09:53 libfb.so
-rw-r--r-- 1 root root 217048 Oct 25 09:53 libglamoregl.so
-rw-r--r-- 1 root root 146088 Oct 25 09:53 libint10.so
-rw-r--r-- 1 root root 14472 Oct 25 09:53 libshadowfb.so
-rw-r--r-- 1 root root 39112 Oct 25 09:53 libshadow.so
-rw-r--r-- 1 root root 31120 Oct 25 09:53 libvbe.so
-rw-r--r-- 1 root root 35880 Oct 25 09:53 libvgahw.so
-rw-r--r-- 1 root root 133904 Oct 25 09:53 libwfb.so
sysop@x1904:~$
Looking in /drivers and no nvidia file there either:
sysop@x1904:~$ ls -al /usr/lib/xorg/modules/drivers/
total 3064
drwxr-xr-x 2 root root 4096 Nov 22 17:40 .
drwxr-xr-x 5 root root 4096 Nov 14 23:26 ..
-rw-r--r-- 1 root root 160864 Sep 18 02:23 amdgpu_drv.so
-rw-r--r-- 1 root root 14504 Sep 18 03:54 ati_drv.so
-rw-r--r-- 1 root root 27648 Oct 4 02:11 fbdev_drv.so
-rw-r--r-- 1 root root 1686056 Oct 11 03:39 intel_drv.so
-rw-r--r-- 1 root root 111168 Oct 25 09:53 modesetting_drv.so
-rw-r--r-- 1 root root 212968 Jun 25 11:39 nouveau_drv.so
-rw-r--r-- 1 root root 180840 May 23 2018 qxl_drv.so
-rw-r--r-- 1 root root 514336 Sep 18 03:54 radeon_drv.so
-rw-r--r-- 1 root root 31784 Aug 18 06:42 vesa_drv.so
-rw-r--r-- 1 root root 170168 May 28 00:57 vmware_drv.so
sysop@x1904:~$

Mind you, I do not know, but seems logical the nvidia_drv.so should be pointed to.