[Bug 89908] New: [IVB Macbook HDMI] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Apr 5 09:03:46 PDT 2015


https://bugs.freedesktop.org/show_bug.cgi?id=89908

            Bug ID: 89908
           Summary: [IVB Macbook HDMI] [drm:intel_dp_complete_link_train]
                    *ERROR* failed to train DP, aborting
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: chris.bainbridge at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Hardware: IVB Macbook Pro 13

Kernel: latest git 4.0-rc6+ f8b3d8a 
(also get same error with Debian kernel 3.16.0-4)

Reproduce:

- Boot with external monitor on HDMI port (using HDMI->DVI adaptor)

Result:

[    1.500888] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP,
aborting
[    1.517432] [drm:ironlake_crtc_enable] *ERROR* mode set failed: pipe A stuck
xorg: laptop display blank, monitor corrupt

Full dmesg attached.

HDMI only = FAIL
HDMI+DP = FAIL
HDMI+DP1+DP2 = OK
DP1 = OK
DP1+DP2 = OK

Interestingly the triple monitor setup works ok but all other setups using HDMI
port fail. Setups without HDMI port work OK.

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