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 <micha...@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
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