[Bug 103558] [IGT] [KBL only] igt@* - dmesg-warn *ERROR* Link Training Unsuccessful

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103558

Eero Tamminen <eero.t.tamminen at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eero.t.tamminen at intel.com

--- Comment #37 from Eero Tamminen <eero.t.tamminen at intel.com> ---
We started seeing link training errors in dmesg on our perf lab last week (16th
onwards), on KBL GT3e NUC which is connected to KVM, but not on KBL GT2 NUC,
which isn't connected to KVM.

This happened on all tracks, Mesa, X, kernel, so it seems to have been
triggered by something else than kernel change (firmware?).

KVM connector is DVI, which is connected to KBL i7 7567U HDMI output through
HDMI->DVI converter:
----------------------------------
$ sudo cat /sys/kernel/debug/dri/0/i915_display_info
...
connector 47: type DP-1, status: connected
        name: 
        physical dimensions: 530x300mm
        subpixel order: Unknown
        CEA rev: 3
        DPCD rev: 12
        audio support: yes
        DP branch device present: yes
                Type: HDMI
                ID: MC2800�s{�
                HW: 2.2
                SW: 1.66
                Max TMDS clock: 600000 kHz
                Max bpc: 16
----------------------------------

Other (non-KBL) devices connected to the same KVM with similar converter don't
show same issue, just KBL.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20171220/486a6323/attachment.html>