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 at 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
