Bug#658662: drm/i915: no signal via DisplayPort on Sandy Bridge since Linux 3.2

[Peter Colberg <peter@colberg.org>]

On Wed, Feb 08, 2012 at 04:42:01PM -0600, Jonathan Nieder wrote:
> tags 658662 + upstream patch moreinfo
> quit
> 
> Peter Colberg wrote:
> 
> > cd9dde44f47501394b9f0715b6a36a92aa74c0d0 is the first bad commit
> 
> Yay, thanks much for this. :)
> 
> Please test the attached patch against the linux-3.2.y branch.
> 
> 	git remote add -f stable \
> 	 git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
> 	git checkout stable/linux-3.2.y
> 
> 	git am -3sc thepatch
> 	make silentoldconfig; # reuse configuration
> 	make deb-pkg; # optionally with -j<num>
> 	dpkg -i ../<name of package>
> 	reboot

> From: Keith Packard <keithp@keithp.com>
> Date: Wed, 25 Jan 2012 08:16:25 -0800
> Subject: drm/i915: Force explicit bpp selection for intel_dp_link_required
> 
> commit c898261c0dad617f0f1080bedc02d507a2fcfb92 upstream.
>

Thanks, but I just tested this patch (again).

It is included in drm-intel-fixes, and it does not fix the regression:

https://bugs.freedesktop.org/show_bug.cgi?id=45801#c5

Given that the problem persists, at least my bisect was not in vain ;-).

Peter