Bug#567747: xserver-xorg-video-intel: Reviewing Xorg.0.log appears X system didn't detect a Screen

[Juan Ramon Chan Aquino <jrchan@xailna.com>]

Hi Brice,

Now I also believe is a kernel problem, because enabling KMS and test...

with my current kernel (testing):
linux-image-2.6.32-trunk-686          2.6.32-5 fail, no LVDS in dmesg

using previous:
linux-image-2.6.30-2-686              2.6.30-8squeeze1 works! there is 
mention LVDS in dmesg

using version on sid:
linux-image-2.6.32-1-686              2.6.32-6                   fail, 
no LVDS in dmesg

Sorry I didn't find 2.6.33-rc in debian packages, may be I am searching 
wrong...

Also found a related problem in bug #560158 where mention 2.6.32-6 
resolve this issue, but I try it and fail

At least using linux-image-2.6.30-2-686 it is a better solution than 
disable KMS, I expect new kernel version could help us.

Just to comment, also using linux-image-2.6.30-2-686 in system with 
intel 855 video card model works!

JRChan


On 02/03/2010 12:05 AM, Brice Goglin wrote:
> reassign 567747 linux-2.6 2.6.32-5
> retitle 567747 KMS/i945 fails to find LVDS
> thank you
>
>
>
> Juan Ramon Chan Aquino wrote:
>    
> > Thanks for your suggestions, first I try using Option "Enable" "true"
> > on KMS enable but doesn't work X still hang, also I try xrandr and
> > show no screens. After Googling found some pieces of information,
> > first in bug #555906 Julien Cristau sugest a way to enable KMS by
> > default (so previous versions of intel was working on UMS?) in recent
> > version of package (2:2.9.1-1+exp1->  2:2.9.1-2). So my assumption is
> > when upgrade to 2:2.9.1-2 my system stop working because use of KMS,
> > right?
> >
> > I found in bug #567712 information to disable KMS:
> >
> > "A Disabling KMS fixes this problem (might be related to [1]), just
> > comment out
> > the line in /etc/modprobe.d/i915-kms.conf
> > options i915 modeset=0"
> >
> > So I disable KMS on my system and Now it works! and xrandr detects
> > fine all my screens
> >      
> So the problem seems to be in the kernel (that's where KMS detects
> monitors) so I am reassigning this bug to linux-2.6. Does dmesg say
> anything about LVDS when you reenable KMS ? Can you try 2.6.33-rc ?
>
> Brice
>
>
>