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Bug#606288: xserver-xorg-video-intel: No longer finds display; does not allow VT switch (ThinkPad X200)



On Thu, Dec  9, 2010 at 11:01:23 -0800, Josh Triplett wrote:

> On Wed, Dec 08, 2010 at 12:33:46PM +0100, Cyril Brulebois wrote:
> > Julien Cristau <jcristau@debian.org> (08/12/2010):
> > > Doesn't look like it's actually attached?
> 
> Oops.  Attached.
> 
> > > Make sure you set
> > > CONFIG_DRM_I915_KMS=y.
> 
> I don't have that set, but the standard Debian 2.6.36 and 2.6.32 kernels
> don't seem to have it set either.  As far as I know, that just sets the
> *default* for i915.modeset; xserver-xorg-video-intel installs
> /etc/modprobe.d/i915-kms.conf which sets "options i915 modeset=1", so
> that should supercede CONFIG_DRM_I915_KMS, shouldn't it?
> 
CONFIG_DRM_I915_KMS=y also adds module aliases to the driver so it gets
loaded automatically by udev on boot.  The debian kernels are patched to
have these aliases even without KMS=y.  The X driver used to call
'modprobe i915' itself, which was hiding that issue, but the last
version changed to check for KMS before that.

> > That, plus since you have no xorg.conf, it should fall back to vesa
> > (or fbdev? I didn't check all combinations) if those are installed.
> > It'd be nice if you could confirm this point while rebuilding with the
> > option Julien mentioned. :)
> 
> It certainly tried to fall back to vesa, but I don't have that installed
> since (normally) the intel driver handles my hardware just fine. :)
> 
Right.

Cheers,
Julien

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