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

[Daniel Vetter]

On Tue, Jan 17, 2012 at 11:53:47PM +0100, Angela Schmid wrote:
> Over HDMI works:
> 
> "1280x720 at 50hz"   74.25  1280 1720 1760 1980  720 725 730 750 +hsync +vsync
> 
> 1280x720 at 50hz (0xb4)   74.2MHz +HSync +VSync *current
> 
>         h: width  1280 start 1720 end 1760 total 1980 skew    0 clock   37.5KHz
> 
>         v: height  720 start  725 end  730 total  750           clock   50.0Hz
> 
>  
> 
>  
> 
> "1440x576i"x0.0   27.00  1440 1464 1590 1728  576 580 586 625 interlace -hsync -vsync 
> 
> 1440x576ix0.0 (0xbd)   27.0MHz -HSync -VSync Interlace *current
> 
>         h: width  1440 start 1464 end 1590 total 1728 skew    0 clock   15.6KHz
> 
>         v: height  576 start  580 end  586 total  625           clock   25.0Hz
> 
> and
> 
> "1440x288"x0.0 27.00 1440 1464 1590 1728 288 290 293 312 -hsync -vsync
> 
>  
> 
> Have a lot of horizontal overscan, vertical very small, useless.

Yeah, many TVs send out a different edid depending upon what connector
they are plugged in. Also we currently don't handle overscan compensation
at all, Rodrigo is working on that.

> It is some time ago, that I compiled kernels myself. I compile drivers regularly. I will have a look next week.
> 
>  
> 
> >Your TV likely sends a CEA block with some HDMI default modes set. Since
> 
> >linux-3.3-rc1 (to be released in a few days) we should be able to decode that. 
> 
> >Can you grab the latest -linus kernel git and try that?
> 
>  
> 
> Too many ways described on one page: http://wiki.ubuntuusers.de/Kernel/Kompilierung
> 
> Kernel.org links to kernel newbies website. Do you have a link how to compile/install ?

Maybe ask on irc about what's suggested. Way back I've used "Die
klassische Debian-Methode".

> >You need to compile a new kernel, the output handling part of the graphics driver is there. Best is to try the latest
> drm-intel-fixes tree available
> 
> >at: https://git.kernel.org/?p=linux/kernel/git/keithp/linux.git;a=shortlog;h=refs/heads/drm-intel-fixes
> 
> Can I wait for the ppa:xorg-edgers ?

If they track drm-intel-fixes, yeah. But you might want to try to compile
the kernel, too, in case we have some additional patches for you to apply.

Yours, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48