From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Subject: MacBook Pro 10,1 + i915 Date: Mon, 1 Jul 2013 22:39:14 +0200 Message-ID: <201307012239.14669.marex@denx.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org Cc: daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Hi guys, I recently got the rMBP 10,1 model, it has two graphic cards: 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 650M Mac Edition] (rev a1) I'm running linux 3.10-rc7 . The nvidia works with nouveau, but I'd prefer to switch the nvidia off altogether and use the intel GPU. So far I arrived at the point where I disabled X11, mounted debugfs and tried the vgaswitcheroo. With the nvidia still in operation, I see the console. Unfortunatelly, I end up with a black screen after I run the following command to switch to the intel GPU: echo IGD > /sys/kernel/debug/vgaswitcheroo/switch If I try to switch back to the nvidia card (using echo DIS > ...), the screen remains black. This state persists until reboot. I suspect [1] is the same bug, none of the hints there helped. Can you please give me any hint/patch/idea/... how to continue? Thank you! [1] https://bugs.freedesktop.org/show_bug.cgi?id=61115 Best regards, Marek Vasut