From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Zimmermann <michaelz@ib-mz.com>
Subject: Re: i915 and eDP issue !?
Date: Mon, 18 Mar 2013 07:59:21 +0100
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To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
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Hi Daniel,

thanks a lot for your tip. At the end it works with one of the latest 
kernel (the one which is merged with the sputnik project due to a 
not-working touchpad). Now my machine works perfect.

Kind regards,

Michael

Am 17.03.2013 20:38, schrieb Daniel Vetter:
> On Sun, Mar 17, 2013 at 11:21 AM, Michael Zimmermann <michaelz@ib-mz.com> wrote:
>> I own a Dell XPS 12 with an IvyBridge Graphic card, a Mini DisplayPort and
>> an internal display which is accessible via eDP1. So far the only chance to
>> get this machine running properly with Ubuntu 12.10 64-bit is to set
>> acpi=off as boot parameter with all the disadvantages of not having the ACPI
>> features. Without the setting the screen is blank (=black), but I hear the
>> drumsticks and can access the machine via ssh. Checking dmesg and Xorg.0.log
>> gives no serious hint of having a problem. Astonishingly if I plug in an
>> external monitor I can see the normal ubuntu user interface on it and work
>> with it, where the monitor of the laptop remains blank. As far as I can see
>> ACPI and the graphic card work well except for not detecting eDP1 as the
>> device of choice then ACPI is turned on. Turning off ACPI means that the
>> kernel starts SFI (Simple firmware interface) which does not have the
>> problem and that works. I would like to get the ACPI features, especially
>> power management and cpu usage, which is quite essential on a laptop,
>> running so I would like to ask you for advice, if there is any possibility
>> for solving this you may be the right person having the internals of
>> tweaking the i915.
> Please test with the latest released kernels (3.8.x) and preferrably
> also with latest drm-intel-nightly (ubuntu has a nice ppa at
> http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-experimental/).
> If that's still broken please file a bug report at
> bugs.freedesktop.org against dri -> drm (Intel).
>
> Also when poking please never only send a mail to your maintainer, but
> always cc a mailing list (since he might be on vacation or just really
> busy).
>
> Thanks, Daniel