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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - System hangs when some video output is disabled/enabled on Skylake platform in double/triple display configuration"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94822#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - System hangs when some video output is disabled/enabled on Skylake platform in double/triple display configuration"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94822">bug 94822</a>
from <span class="vcard"><a class="email" href="mailto:echerkasov@dev.rtsoft.ru" title="Edgar Cherkasov <echerkasov@dev.rtsoft.ru>"> <span class="fn">Edgar Cherkasov</span></a>
</span></b>
<pre>(In reply to cprigent from <a href="show_bug.cgi?id=94822#c11">comment #11</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=123571" name="attach_123571" title="SKL-Y_4.6-rc6-447f243_kern.log">attachment 123571</a> <a href="attachment.cgi?id=123571&action=edit" title="SKL-Y_4.6-rc6-447f243_kern.log">[details]</a></span>
> SKL-Y_4.6-rc6-447f243_kern.log
>
> I reproduced a similar problem on SKL-Y with fresh kernel.
>
> Steps:
> -------
> 1. Connect HDMI and DP screens
> 2. Boot
> 3. xrandr --output eDP1 --off
> 4. xrandr --outout eDP1 --auto
>
> Actual result:
> ----------------
> 4. eDP stays black. Command does not respond
>
> Info
> -----
> Could be the same as <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [SKL APL] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled"
href="show_bug.cgi?id=89055">bug 89055</a>
>
> Not reproduced with 4.6 rc6 from <a href="https://cgit.freedesktop.org/drm-intel/">https://cgit.freedesktop.org/drm-intel/</a>
> commit 871c895c2d3192a93a701b31d2576184ab070c66
> Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@intel.com">rodrigo.vivi@intel.com</a>>
> Date: Thu May 5 16:49:48 2016 -0700
> drm-intel-nightly: 2016y-05m-05d-23h-49m-21s UTC integration manifest
>
> Setup
> ------
> Hardware
> Platform:
> CPU : Intel(R) Core(TM) m5-6Y57 CPU @ 1.10GHz (family: 6, model: 78
> stepping: 3)
> MCP : SKL-Y D1 2+2
> QDF : QJK9
> CPU : SKL D0
> Chipset PCH: Sunrise Point LP C0
> CRB : SKY LAKE Y LPDDR3 RVP3 CRB FAB2
> Software
> Linux OS : Ubuntu 16.10 64 bits
> BIOS : SKLSE2R1.R00.B104.B01.1511110114
> ME FW : 11.0.0.1191
> Ksc (EC FW): 1.20
> Kernel: drm-intel-nightly 4.6.0-rc6 447f243 from
> <a href="http://cgit.freedesktop.org/drm-intel">http://cgit.freedesktop.org/drm-intel</a>
> commit 447f2438e5ee3e9bb7d5cbe88fc44cdff74cc165
> Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
> Date: Sun May 8 18:21:27 2016 +0200
> drm-intel-nightly: 2016y-05m-08d-16h-21m-00s UTC integration manifest
> drm: libdrm-2.4.67-11 ea78c17 from <a href="http://cgit.freedesktop.org/mesa/drm/">http://cgit.freedesktop.org/mesa/drm/</a>
> xorg-server-1.18.0-254 44e1c97 from
> git://git.freedesktop.org/git/xorg/xserver
> mesa: mesa-11.1.2 7bcd827 from <a href="http://cgit.freedesktop.org/mesa/mesa/">http://cgit.freedesktop.org/mesa/mesa/</a>
> cairo: tag 1.15.2 db8a7f1 from <a href="http://cgit.freedesktop.org/cairo">http://cgit.freedesktop.org/cairo</a>
> libva: libva-1.7.0-1 2339d10 from <a href="http://cgit.freedesktop.org/libva/">http://cgit.freedesktop.org/libva/</a>
> vaapi-intel-driver: 1.7.0.pre1 ab8e4e3 from
> <a href="http://cgit.freedesktop.org/vaapi/intel-driver">http://cgit.freedesktop.org/vaapi/intel-driver</a></span >
I reproduced this on my machine with same results and errors.
Best regards,
Edgar Cherkasov</pre>
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