Hi all,

I've been trying for the past few hours to get Xorg -configure to work in my Dell XPS L401x (Optimus w/ Intel HD graphics and the NVIDIA 420m).

I've blacklisted nouveau, and uninstalled it from Fedora 16 64 bit. I've also disabled the discreet card using acpi_call, and can verify it with lspci | grep vga.

However, Xorg -configure still results in "Number of created screens does not match number of detected devices." I've searched online to no avail.

Here is the Xorg.1.log : http://pastebin.com/AVASTQ5P


Any help or direction is greatly appreciated!

-scen

Are you trying to use Bumblebee? I have the Alienware M14x, with the nVidia GT 555M with 3 GB of RAM, and I have successfully got it to work; I have a thread of a how-to in order to get it work, maybe try checking it out to see how I did it? Sorry to say, but the Bumblebee project is your best route to go, since Optimus is NOT natively supported within linux.

Cheers,

Josh

I've been using Ironhide, but I'll try to find your thread.

Ahh ok. Bumblebee seems to be more actively developed on, and besides, ironhide seems to be more of an Ubuntu-made version. How have you installed and configured it?

Sorry for the confusion, I was on Ubuntu 11 before this, but got tired of Unity. I'm now using Fedora 16 + dwm.

One question: How will installing bumblebee stop the error I've mentioned above from happening?

I recommend you disable intel graphics and agpgart in the kernel, delete xorg.conf, and install the nvidia drivers and have it make a minimal config.

Just like texmex said, you need to delete your xorg.conf, since this will cause many conflicts. Honestly, you don't need to fully disable anything hardware wise, but you will need to rmmod nvidiafb and nouveau, and install the proprietary nvidia drivers. After that, install bumblebee, and manually call optirun to run whatever program you need using the nvidia chipset. As I have stated before, optimus is not supported natively under linux. By default, my system is not using any xorg configuration files. After I run up the bumblebee service, bumblebee itself runs a new xorg.conf under X, so I can run optirun without any errors being generated.

The thing is, I'm using an external monitor. (hooked up to the mini display port out from the laptop, which is connected to the IGP, as opposed to the HDMI-out) I'm trying to get it to remember to turn off and disable the internal monitor. It doesn't remember my settings after reboot, and the login screen *always* displays using the internal screen as a primary monitor.

I can disable the internal monitor manually using xrandr --output "LVDS1" --off

EDIT:

Just found this excellent article (http://www.jejik.com/articles/2008/1..._debian_lenny/)

But it doesn't not explain how to disable the internal display during the login screen.

Thanks for your help guys, but I fixed it myself (I think)

Since I still have GNOME on my computer (haven't bothered uninstalling it), I just added xrandr --output "LVDS1" --off to /etc/gdm/Init/Default file.

Ahh ok. So then is everything good then?

Yep