[Intel-gfx] Sandy Bridge Desktop - 1920x1080i interlace not working

[Angela Schmid]

Hello Alfonso

 

The patches are not yet merged 

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=history;f=drivers/gpu/drm/i915;hb=HEAD

 

I also don't see them at the repository I received from Daniel

https://git.kernel.org/?p=linux/kernel/git/keithp/linux.git;a=history;f=drivers/gpu/drm/i915

 

When will the patches be commited or merged ?

 

Angela

 

 

From: Alfonso Fiore [mailto:alfonso.fiore at gmail.com] 
Sent: 18 January 2012 15:28
To: Peter Ross
Cc: Angela Schmid
Subject: Re: [Intel-gfx] Sandy Bridge Desktop - 1920x1080i interlace not working

 

 

Hi Peter!

 

Thank you, fantastic news! :)

 

> Version 2 of the patch set will work on a broader range of chipsets including
> Sandy Bridge. I have just posted this to the list. It is also available here:
> <http://lists.freedesktop.org/archives/intel-gfx/2012-January/014504.html> 

 

thank you!

 

> To test you will need to recompile your kernel. In my case there was no need
> to recompile Xorg, as the problem is confined to the kernel drm driver. If
> you are running Debian or Ubuntu I can walk you through it.

 

I absolutely accept your help. Thank you!

As far as I understand I need to compile kernel from git.

I use Ubuntu Oneiric 11.10.

I found this article. Maybe you can have a look and tell me if these are the right steps to follow:

https://wiki.ubuntu.com/KernelTeam/GitKernelBuild 

 

Basically what I don't know is at which step and how apply your patch.

 

Just to confirm with you, I run Xorg 1.10.4 (xorg-edgers crashes after a few mins for me).

 

I will have time to try tomorrow evening and over the weekend.

 

Awesome! :)

 

regards,

alfonso

 

On Wed, Jan 18, 2012 at 2:55 PM, Peter Ross <pross at xvid.org> wrote:

On Tue, Jan 17, 2012 at 10:01:59PM +0100, Alfonso Fiore wrote:
> On Tue, Jan 17, 2012 at 9:25 PM, Eugeni Dodonov <eugeni at dodonov.net> wrote:
>
> > On Tue, Jan 17, 2012 at 18:14, Alfonso Fiore <alfonso.fiore at gmail.com>wrote:
> >
> >>
> >> Hi Angela,
> >>
> >> I have a very similar problem!
> >>

Hi Angela and Alfonso,

You may be in luck. I encountered the same interlace problem last weekend with
my 1080i television and G35 chipset, and wrote a patch. While my chipset is not
a Sandy Bridge chipset, they apparently share the same interlace logic.


> >> I have Sandy Bridge (i3 2130) and a Philips 32pf9731d (coincidence?).
> >> With my previous i3 550 I didn't have any problem.
> >>
> >> I tried all possible resolutions over HDMI and all the time the screen is
> >> split in two (twice the top half) and flickering. I also can't manage to
> >> use VGA (TV has VGA input).
> >>
> >> I also tried with the latest kernel and latest X.
> >>
> >> Can you try to run this tool? http://polypux.org/projects/read-edid/
> >>
> >> I'm absolutely not an expert, but the output I get (Your EDID is probably
> >> invalid.) is not encouraging.
> >>
> >> I'd love to know if you get the same error.
> >>
> >
> > Could you try with the following two patches which just came to this list
> > this week?
> > http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/8006
> >
> > Don't know if they will fix the problem, but they could help perhaps.
> >

Nb: The initial version of the patch set (given above) enables interlacing only
on generation 4 chipsets, such as G35 and Q45.

Version 2 of the patch set will work on a broader range of chipsets including
Sandy Bridge. I have just posted this to the list. It is also available here:
<http://lists.freedesktop.org/archives/intel-gfx/2012-January/014504.html>


> I'm just an end-user. I have the willingness to try, but I need a bit more
> guidance... I've never compiled X. If you can point me to some page that
> explains the process I'll be more than happy to try.

To test you will need to recompile your kernel. In my case there was no need
to recompile Xorg, as the problem is confined to the kernel drm driver. If
you are running Debian or Ubuntu I can walk you through it.

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)

 

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