From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 101559] New: Displays fail to wake up when booting machine away from Display Port KVM switch Date: Thu, 22 Jun 2017 16:36:51 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0071343351==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============0071343351== Content-Type: multipart/alternative; boundary="14981494111.9A49.14681"; charset="UTF-8" --14981494111.9A49.14681 Date: Thu, 22 Jun 2017 16:36:51 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D101559 Bug ID: 101559 Summary: Displays fail to wake up when booting machine away from Display Port KVM switch Product: xorg Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: Driver/nouveau Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Reporter: dhruv.a.thakkar-taCtA1Gr/WzQT0dZR+AlfA@public.gmane.org QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org Created attachment 132142 --> https://bugs.freedesktop.org/attachment.cgi?id=3D132142&action=3Dedit Xorg.0.log Description of problem: We are trying to solve an issue in which displays fail to wake up when boot= ing a Rhel 7.3 machine (Machine A) connected to a Display Port KVM while the KV= M is pointing to Machine B. The unusual bit is that xorg logs in /var/log/Xorg.0= .log indicate that everything comes up correctly, and a "ps -ef |grep X|xinit" s= hows that X and xinit are up and running. If we boot Machine A while the KVM is pointing to it, the displays come up with no issues. We have KMS parameters set to force the output of the video (video=3DDP-1:2560x1600D and video=3DDP-2:2560x1600D) as well as options to= load the EDID information. These parameters have worked in the past for us when = we used DVI connections through KVMs, but DisplayPort is not showing the same results. Note that we have additional kernel options added for extra debug information (log_buf_len=3D8M nouveau.debug=3Ddisp=3Dtrace,i2c=3Dtrace,bios= =3Dtrace) Using Xrandr and Udev rules with a script allow us to turn off and then bac= k on the displays automatically, allowing us a workaround, but it still does not solve the core issue of that nouveau is not waking up the monitors. Please see the attached logs/config files and diagram below for more information. |Machine A| |Machine B| \ / \ / \ _________ / |DPort KVM| |_________| / \ / \ / \ |Monitor 2| |Monitor 1| --=20 You are receiving this mail because: You are the assignee for the bug.= --14981494111.9A49.14681 Date: Thu, 22 Jun 2017 16:36:51 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated
Bug ID 101559
Summary Displays fail to wake up when booting machine away from Displ= ay Port KVM switch
Product xorg
Version unspecified
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component Driver/nouveau
Assignee nouveau@lists.freedesktop.org
Reporter dhruv.a.thakkar@leidos.com
QA Contact xorg-team@lists.x.org 

Created attachment 132142 [det=
ails]
Xorg.0.log

Description of problem:

We are trying to solve an issue in which displays fail to wake up when boot=
ing
a Rhel 7.3 machine (Machine A) connected to a Display Port KVM while the KV=
M is
pointing to Machine B. The unusual bit is that xorg logs in /var/log/Xorg.0=
.log
indicate that everything comes up correctly, and a "ps -ef |grep X|xin=
it" shows
that X and xinit are up and running. If we boot Machine A while the KVM is
pointing to it, the displays come up with no issues.

We have KMS parameters set to force the output of the video
(video=3DDP-1:2560x1600D and video=3DDP-2:2560x1600D) as well as options to=
 load
the EDID information. These parameters have worked in the past for us when =
we
used DVI connections through KVMs, but DisplayPort is not showing the same
results. Note that we have additional kernel options added for extra debug
information (log_buf_len=3D8M nouveau.debug=3Ddisp=3Dtrace,i2c=3Dtrace,bios=
=3Dtrace)

Using Xrandr and Udev rules with a script allow us to turn off and then bac=
k on
the displays automatically, allowing us a workaround, but it still does not
solve the core issue of that nouveau is not waking up the monitors.

Please see the attached logs/config files and diagram below for more
information.

|Machine A| |Machine B|
\               /
 \             /
  \ _________ /
   |DPort KVM|
   |_________|
   /         \
  /           \
 /             \
|Monitor 2| |Monitor 1|

You are receiving this mail because:
  • You are the assignee for the bug.
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