Bug#740953: [xserver-xorg-video-nouveau]: No devices detected. (anymore)

[Sven Joachim <svenjoac@gmx.de>]

On 2014-03-11 16:13 +0100, Paul Brossier wrote:

> I installed 3.14-rc5 to see if it would help, but Xorg still fails
> starting. Let me know if there is anything else I can try, or any more
> info I can provide.

The best would be to bisect the kernel between 3.12 and 3.13, but that
is of course going to take a lot of time (several hours at least).

> [    15.250] (II) [drm] nouveau interface version: 1.1.1
> [    15.250] (WW) Falling back to old probe method for modesetting
> [    15.251] (WW) Falling back to old probe method for fbdev
> [    15.251] (II) Loading sub module "fbdevhw"
> [    15.251] (II) LoadModule: "fbdevhw"
> [    15.251] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
> [    15.251] (II) Module fbdevhw: vendor="X.Org Foundation"
> [    15.251] 	compiled for 1.15.0, module version = 0.0.2
> [    15.251] 	ABI class: X.Org Video Driver, version 15.0
> [    15.251] (WW) Falling back to old probe method for vesa
> [    15.251] (EE) No devices detected.

I wonder why X displays this error after loading the _vesa_ driver (this
driver cannot possibly work and would normally be unloaded).  What
happens if you create a minimal /etc/X11/xorg.conf like this:

--8<---------------cut here---------------start------------->8---
Section "Device"
	Identifier	"n"
	Driver		"nouveau"
EndSection
--8<---------------cut here---------------end--------------->8---

Instead of nouveau you can also try modesetting and fbdev here, in order
of decreasing functionality.

Cheers,
       Sven