Accelerated X stop working

[Jean Sagi]

Hi all,

Two days ago, when I boot I didn't get a graphical login, instead a 
normal text login. After reading some logs I saw that there was an error 
in the XFree86 log:
...
(**) NVIDIA(0): Use of NVIDIA internal AGP requested
(--) NVIDIA(0): Linear framebuffer at 0xF0000000
(--) NVIDIA(0): MMIO registers at 0xFD000000
(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!
(EE) NVIDIA(0): *** Aborting ***
(II) UnloadModule: "nvidia"
(II) UnloadModule: "vgahw"
(II) Unloading /usr/X11R6/lib/modules/libvgahw.a
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found
...

I search some forums and I found that when several upgrades are made to 
nvidia drivers then problems arise.
A common solution is to reinstall nvidia drivers or upgrade them to a 
more recent version.

While I was  considering this, I tried using the non-accelerated "nv" 
driver wich comes with default XFree86 and then X came up again, 
obviously with no acceleration. I changed the line:

Driver "nvidia"

by

Driver "nv"

And as I said X works again, so there is something I did... But I really 
don't remember what, I haven't changed any file, or installed/upgraded 
any package.

Any help would be very appreciated, and BTW I use Mandrake 10 Oficial, 
(Standar Kenerl 2.6.3-7)


Chucho!