<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 - Excessive CPU load by the xorg-server and GUI's hard lags"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99457">99457</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Excessive CPU load by the xorg-server and GUI's hard lags
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>xorg
          </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>Driver/Radeon
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>xorg-driver-ati@lists.x.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>eshkrig@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>xorg-team@lists.x.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=129041" name="attach_129041" title="Xorg.0.log, /proc/cpuinfo, output of dmesg, lspci, dmidecode">attachment 129041</a> <a href="attachment.cgi?id=129041&action=edit" title="Xorg.0.log, /proc/cpuinfo, output of dmesg, lspci, dmidecode">[details]</a></span>
Xorg.0.log, /proc/cpuinfo, output of dmesg, lspci, dmidecode

Hi!
Sorry for my English.

I use vnc xorg-module for remote support users.

In September 2016 I have updated xorg-server, tigervnc, xf86-video-ati and
related packages.

Packages versions before updating:
xorg-server-1.17.4
xf86-video-ati-7.5.0
tigervnc-1.4.2-r2

Packages versions after updating:
xorg-server-1.18.4
xf86-video-ati-7.7.0
tigervnc-1.6.0-r2

I faced the problem of excessive CPU load by the xorg-server and GUI's hard
lags.
I found that disabling vnc module in xorg.conf eliminates the problem.

The problem occurs only with video cards AMD.

I recently noticed that the problem only occurs when monitor connected via DVI.
When monitor connected through VGA everything works as it should.

To date, kernel version 4.4.39, but different versions 4.4.6 - 4.4.39 have no
effect on the problem.
I tried version xf86-video-ati-7.8.0 and tigervnc-1.7.0 - the problem persists.

Distribution - Gentoo
The attachment files Xorg.0.log, /proc/cpuinfo, output of dmesg, lspci,
dmidecode.

There is a bug report for tigervnc:
<a href="https://github.com/TigerVNC/tigervnc/issues/401">https://github.com/TigerVNC/tigervnc/issues/401</a></pre>
        </div>
      </p>


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