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On 2011-08-31T01:28:28+00:00 Paul McGarry wrote:

Created attachment 50752
kernel log with drm.debug=0x06

System:
Intel 2600K
Intel DH67GD motherboard
Ubuntu Oneiric with 3.0.0-9-generic-pae kernel
Apple 27 iMac connected as an external monitor via displayport.

On boot the iMac switches to the displayport input and shows the
motherboard boot screen and grub but the screen goes dark when it gets
into the graphical part of the boot and stays that way.

I have also tried with the Fedora 16 alpha live  disk and the same thing
seems to happen.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/4

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On 2011-08-31T01:29:35+00:00 Paul McGarry wrote:

Created attachment 50753
Xorg log from same boot

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/5

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On 2011-08-31T01:33:22+00:00 Paul McGarry wrote:

There was some brief discussion on this a few months ago:
http://lists.freedesktop.org/archives/intel-gfx/2011-April/010479.html

There are some differences since then (I seem to get modeline in the new
logs) but no real difference.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/6

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On 2011-09-01T15:41:29+00:00 Paul McGarry wrote:

Created attachment 50832
3.1.0-rc4 kern.log with drm.debug=0x06

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/7

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On 2011-10-27T00:46:08+00:00 Paul McGarry wrote:

Created attachment 52814
Log from newer kernel

Partial log (grepped for drm) from newer kernel.

I wanted to build from drm-intel-next but did not work out how pull and build 
it myself so Kernel is 
linux-image-3.1.0-997-generic_3.1.0-997.201110240423_i386.deb
from
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/8

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On 2012-02-20T11:26:26+00:00 Chris Wilson wrote:

This would be worth retesting with the latest kernel as it contains a
number of bandwidth calculation fixes for DP.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/9

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On 2012-04-15T05:09:08+00:00 Daniel-ffwll wrote:

To be more precise, you need 3.4-rc3 to get all the latest fixes.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/10

------------------------------------------------------------------------
On 2012-05-03T15:53:19+00:00 Paul McGarry wrote:

Created attachment 61003
kernel log from a 3.4.0 drm-intel-experimental kernel

This is a log from a boot with the pae kernel from:

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-
experimental/2012-05-03-precise/

which was the most recent one I could find. Same on screen behaviour as
before, screen goes dark once past the text part of the boot process.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/11

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On 2012-08-22T15:56:52+00:00 Daniel-ffwll wrote:

Presumably fixed with the prefer lanes-over-bw patch:

commit 2514bc510d0c3aadcc5204056bb440fa36845147
Author: Jesse Barnes <[email protected]>
Date:   Thu Jun 21 15:13:50 2012 -0700

    drm/i915: prefer wide & slow to fast & narrow in DP configs

This patch is merged into 3.6-rc1. If this is still an issue on kernels
containing this patch, please reopen. If you reopen, please also attach
a new dmesg (again with drm.debug=0xe), but please ensure that it
contains everything from boot-up (the current one is cut off at the
beginning).

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/12

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On 2012-08-27T22:55:33+00:00 Paul McGarry wrote:

Created attachment 66195
Kernel log from 3.6rc3

Tested using i386 builds from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc3-quantal/

Still get a dark screen after bios.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/13

------------------------------------------------------------------------
On 2012-08-28T07:24:45+00:00 Daniel-ffwll wrote:

The dmesg is cut off at the beginning, you need to increase the dmesg
buffer by adding log_buf_len=2M to the kernel cmdline. Please ensure
that the entire dmesg is captured when attaching it, otherwise please
increase the dmesg buffer some more.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/14

------------------------------------------------------------------------
On 2012-08-31T06:40:04+00:00 Paul McGarry wrote:

Created attachment 66383
Better log from 3.6.0 rc3

Sorry the previous log wasn't sufficient

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/15

------------------------------------------------------------------------
On 2012-12-11T21:20:29+00:00 Jesse Barnes wrote:

Is this still broken in current kernels and/or drm-intel-next-queued?
Too many changes to count since 3.6.0-rc3, most of them affecting mode
setting.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/16

------------------------------------------------------------------------
On 2013-01-07T17:43:30+00:00 Chris Wilson wrote:

Assuming fixed with the DP rework in 3.7. Please do reopen if you it is
not fixed and can provide the updated log files.

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/835135/comments/17


** Changed in: xserver-xorg-video-intel
       Status: Unknown => Fix Released

** Changed in: xserver-xorg-video-intel
   Importance: Unknown => Medium

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Title:
  Fails to work correctly with attached displayport monitor (27 inch
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