<html>
    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [SKL] [drm:intel_cpu_fifo_underrun_irq_handler [i915]]*ERROR* CPU pipe x FIFO underrun"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=100233">100233</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[SKL] [drm:intel_cpu_fifo_underrun_irq_handler [i915]]*ERROR* CPU pipe x FIFO underrun
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ramix.ben.hassine@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>i915 platform</th>
          <td>SKL
          </td>
        </tr>

        <tr>
          <th>i915 features</th>
          <td>display/atomic
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=130266" name="attach_130266" title="dmesg">attachment 130266</a> <a href="attachment.cgi?id=130266&action=edit" title="dmesg">[details]</a></span>
dmesg

we have FIFO underrun error when making some rotation with 3 monitor connected

Setup:
setup:
=========
Platform SKL Gigabyte
CPU: Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz (family 6, model 94, stepping 3)
GPU: IntelĀ® HD Graphics 530 - Intel Corporation Sky Lake Integrated Graphics
(rev 06)
Motherboard version: H170N-WIFI-CF
Memory: 2x 4GB Kingston 9905622-055.A00G

Software
===========
Bios: F3
Linux distribution: Ubuntu 16.04 64 bits
DMC 1.26 from
<a href="https://01.org/sites/default/files/downloads/intelr-graphics-linux/skldmcver126.tar_1.bz2">https://01.org/sites/default/files/downloads/intelr-graphics-linux/skldmcver126.tar_1.bz2</a>
GUC 6.1 from
<a href="https://01.org/sites/default/files/downloads/intelr-graphics-linux/sklgucver61.tar.bz2">https://01.org/sites/default/files/downloads/intelr-graphics-linux/sklgucver61.tar.bz2</a>
kernel:drm-tip: 2017y-03m-15d-21h-47m-56s UTC integration manifest
  commit: d7cb114e1327b50c609ee6e67122cc0293ea515f
  author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
  authored_date: Wed Mar 15 21:48:18 2017 +0000
drm:libdrm-2.4.75-14-g19c4cfc from  git://git.freedesktop.org/git/mesa/drm=
mesa:mesa-17.0.0 from git://git.freedesktop.org/git/mesa/mesa
cairo:1.15.4 from  git://anongit.freedesktop.org/cairo
xorg-server-macros:util-macros-1.19.1-2-g39f07f7 from  
git://git.freedesktop.org/git/xorg/util/macros
xserver:xorg-server-1.19.0-133-g386fbbe from
git://git.freedesktop.org/git/xorg/xserver
xf86-video-intel: 2.99.917-766-gbe913a3 from
git://git.freedesktop.org/git/xorg/driver/xf86-video-intel
libva: libva-1.7.3.pre1-85-gefc164d
vaapi-intel-driver:1.7.3-343-gef83d40 
waffle:debian/1.5.2-3-202-g03d5566


Steps:
===== 
xrandr --output <output> --rotate normal,inverted,left,right

dmesg:
======
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO
underrun</pre>
        </div>
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