[Bug 97666] Kernel "NULL pointer dereference" with MST monitor on HSW

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97666

--- Comment #5 from Elio <elio.martinez.monroy at intel.com> ---
Hello all,

I was trying with different Kernels from: 

http://kernel.ubuntu.com/~kernel-ppa/mainline/

Including 4.7, 4.8.0 and 4.8rc8

The problem with 4.7 and beyond, before 4.8 seems to be CPU pipe A FIFO
underrun

For 4.8 and beyond, the error is a little bit more specific. Blaming the
dp_link_training_clock.

Hardware: Intel Nuc 6i5SYH

In some cases i need an extra monitor because 4k monitor didn't come back from
sleep


I tried with different software configuration as well facing same behavior. 

Software configuration:

Component         : drm
        url       : http://cgit.freedesktop.org/mesa/drm
        tag       : libdrm-2.4.68
        commit    : fc09c5ab84240e9b6bd0bed01685ef004f56c4fa
        author    : Kenneth Graunke <kenneth at whitecape.org>
        age       : 4 months ago

Component         : mesa
        url       : http://cgit.freedesktop.org/mesa/mesa
        tag       : mesa-12.0.1
        commit    : 04277f058d00238937e664cf546c43b16cea7b2b
        author    : Emil Velikov <emil.velikov at collabora.com>
        age       : 8 weeks ago

Component         : xf86-video-intel
        url       : http://cgit.freedesktop.org/xorg/driver/xf86-video-intel
        tag       : 2.99.917-701-g205146b
        commit    : 205146b0fdc8db016e5cfeeae5a6b25df3470ebc
        author    : Chris Wilson <chris at chris-wilson.co.uk>


Component         : libva
        url       : http://cgit.freedesktop.org/libva
        tag       : libva-1.7.2.pre1
        commit    : 9927bd2fbbb1d923fd6a8932a3cdbb5c9185ee22
        author    : Xiang Haihao <haihao.xiang at intel.com>


Component         : intel-driver
        url       : http://cgit.freedesktop.org/vaapi/intel-driver
        tag       : 1.7.2.pre1
        commit    : ce444fb412966ca6afbb1331b7cae8ab621c1108
        author    : Xiang Haihao <haihao.xiang at intel.com>


Component         : cairo
        url       : http://cgit.freedesktop.org/cairo
        tag       : 1.15.2
        commit    : db8a7f1697c49ae4942d2aa49eed52dd73dd9c7a
        author    : Bryce Harrington <bryce at osg.samsung.com>


Component         : xserver
        url       : http://cgit.freedesktop.org/xorg/xserver
        tag       : xorg-server-1.18.3
        commit    : 9454cd51da9b38b974cff7c8b7125901f6403848
        author    : Adam Jackson <ajax at redhat.com>

Component         : macros
        url       : https://cgit.freedesktop.org/xorg/util/macros
        tag       : util-macros-1.19.0-2-gd7acec2
        commit    : d7acec2
        author    : Andreas Boll <andreas.boll.dev at gmail.com>
        age       : 8 months ago


Component         : intel-gpu-tools
        url       : https://cgit.freedesktop.org/xorg/app/intel-gpu-tools
        tag       : intel-gpu-tools-1.16
        commit    : a28e9e38a9efc6daf5a08d60d29adcd3e328fe6f
        author    : Marius Vlad <marius.c.vlad at intel.com>

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20161004/8b75f87e/attachment-0001.html>