F22 Black Screen with nVidia drivers

[Eduard Huguet]

>
>
> I have a working 2D KDE desktop under Fedora 22 (clean install) with the
> nouveau drivers, but 3D things such as steam do not work.
>
> I uninstalled the nouveau driver and installed the nVidia drivers with
>
>         dnf remove xorg-x11-drv-nouveau
>         dnf install xorg-x11-drv-nvidia
>         dnf install kmod-nvidia
>         dnf upgrade
>
>
> On rebooting I get a black screen where the login (sddm) should be, and
> have to switch to a text mode console on Ctrl-Alt-F2 et. al. to get any
> further.
>
>
> The Xorg log contained the following error messages:
>
>
> [    13.397] (II) Loading /usr/lib64/nvidia/xorg/libglx.so
> [    13.475] (II) Module glx: vendor="NVIDIA Corporation"
> [    13.475]    compiled for 4.0.2, module version = 1.0.0
> [    13.475]    Module class: X.Org Server Extension
> [    13.476] (II) NVIDIA GLX Module  346.72  Tue May  5 17:11:15 PDT 2015
> [    13.476] (==) Matched nouveau as autoconfigured driver 0
> [    13.476] (==) Matched nv as autoconfigured driver 1
> [    13.476] (==) Matched modesetting as autoconfigured driver 2
> [    13.476] (==) Matched fbdev as autoconfigured driver 3
> [    13.476] (==) Matched vesa as autoconfigured driver 4
> [    13.476] (==) Assigned the driver to the xf86ConfigLayout
> [    13.476] (II) LoadModule: "nouveau"
> [    13.479] (WW) Warning, couldn't open module nouveau
> [    13.479] (II) UnloadModule: "nouveau"
> [    13.479] (II) Unloading nouveau
> [    13.479] (EE) Failed to load module "nouveau" (module does not exist,
> 0)
> [    13.479] (II) LoadModule: "nv"
> [    13.479] (WW) Warning, couldn't open module nv
> [    13.479] (II) UnloadModule: "nv"
> [    13.479] (II) Unloading nv
> [    13.479] (EE) Failed to load module "nv" (module does not exist, 0)
> [    13.479] (II) LoadModule: "modesetting"
> [    13.479] (II) Loading
> /usr/lib64/xorg/modules/drivers/modesetting_drv.so
> [    13.480] (II) Module modesetting: vendor="X.Org Foundation"
> [    13.480]    compiled for 1.17.1, module version = 1.17.1
> [    13.480]    Module class: X.Org Video Driver
> [    13.480]    ABI class: X.Org Video Driver, version 19.0
> [    13.480] (II) LoadModule: "fbdev"
> [    13.480] (II) Loading /usr/lib64/xorg/modules/drivers/fbdev_drv.so
> [    13.481] (II) Module fbdev: vendor="X.Org Foundation"
> [    13.481]    compiled for 1.17.1, module version = 0.4.3
> [    13.481]    Module class: X.Org Video Driver
> [    13.481]    ABI class: X.Org Video Driver, version 19.0
> [    13.481] (II) LoadModule: "vesa"
> [    13.481] (II) Loading /usr/lib64/xorg/modules/drivers/vesa_drv.so
> [    13.481] (II) Module vesa: vendor="X.Org Foundation"
> [    13.481]    compiled for 1.17.1, module version = 2.3.2
> [    13.481]    Module class: X.Org Video Driver
> [    13.481]    ABI class: X.Org Video Driver, version 19.0
> [    13.481] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
> [    13.481] (II) FBDEV: driver for framebuffer: fbdev
> [    13.481] (II) VESA: driver for VESA chipsets: vesa
> [    13.485] (EE) open /dev/dri/card0: No such file or directory
> [    13.485] (WW) Falling back to old probe method for modesetting
> [    13.485] (EE) open /dev/dri/card0: No such file or directory
> [    13.485] (II) Loading sub module "fbdevhw"
> [    13.485] (II) LoadModule: "fbdevhw"
> [    13.485] (II) Loading /usr/lib64/xorg/modules/libfbdevhw.so
> [    13.485] (II) Module fbdevhw: vendor="X.Org Foundation"
> [    13.485]    compiled for 1.17.1, module version = 0.0.2
> [    13.485]    ABI class: X.Org Video Driver, version 19.0
> [    13.485] (EE) open /dev/fb0: No such file or directory
> [    13.485] (WW) Falling back to old probe method for fbdev
> [    13.485] (II) Loading sub module "fbdevhw"
> [    13.485] (II) LoadModule: "fbdevhw"
> [    13.485] (II) Loading /usr/lib64/xorg/modules/libfbdevhw.so
> [    13.485] (II) Module fbdevhw: vendor="X.Org Foundation"
>
>
>
>
>
> So, why is Xorg still trying to load the nouveau driver? What
> configuration step have I missed to tell it otherwise?
>
> Any help would be greatly appreciated.
>
> Many thanks,
> Chris R.
>
>
Hi, Chris
I'm not an expert at all, but here's my comments on the issue:
- first of all, you don't need to uninstall nouveau drivers: they get
automatically blacklisted when installing nVidia drivers, so this step is
not needed.
- any reason you are specifically installing "kmod-nvidia" &
"xorg-x11-drv-nvidia" instead of the self-building "akmod-nvidia"? This
would autobuild the nVidia kernel drivers for the kernel you are using.
- are you installing the correct nVidia drivers version? The generic
"-nvidia" packages are for (most of) modern cards, but older ones need
specific driver versions.

Hope this helps,
  Eduard Huguet
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