From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 90681] Radeon Kernel Oops & Lockup when switching on
 DisplayPort attached monitor
Date: Wed, 27 May 2015 14:14:42 +0000
Message-ID: <bug-90681-502@http.bugs.freedesktop.org/>
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--1432736082.dc7df0.32682
Date: Wed, 27 May 2015 14:14:42 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=3D90681

            Bug ID: 90681
           Summary: Radeon Kernel Oops & Lockup when switching on
                    DisplayPort attached monitor
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: bradfirj@fstab.me

Created attachment 116079
  --> https://bugs.freedesktop.org/attachment.cgi?id=3D116079&action=3Dedit
journalctl output for crash

Switching my DisplayPort attached monitor on (or off and then on again) whi=
le
booted to multiuser target (no Xorg or Wayland) causes a kernel Oops, follo=
wed
by soft-lockups which render the system unusable.

Doing the same while at the full Graphical target causes gnome-shell to cra=
sh,
but it is possible to recover the system by logging in again.

The kernel error and IP are:
>May 24 23:25:28 fedora-workstation.home kernel: BUG: unable to handle kern=
el NULL pointer dereference at 00000000000003b0
>May 24 23:25:28 fedora-workstation.home kernel: IP: [<ffffffffa0152055>] r=
adeon_connector_edid+0x5/0x70 [radeon]

Full journal from a reproduction of the bug will be attached, as will lspci
-nn.

I have isolated this using git bisect to the following commit (the patch for
which is attached to this bug).
This is a commit currently part of the linux-stable tree and lies between 4=
.0.2
and 4.0.3

>016a255b7835ee7e49a3eba3c14ba0bc0221a4f8 is the first bad commit
>commit 016a255b7835ee7e49a3eba3c14ba0bc0221a4f8
>Author: Alex Deucher <alexander.deucher@amd.com>
>Date:   Tue Apr 7 09:52:42 2015 -0400
>
>    drm/radeon: only mark audio as connected if the monitor supports it (v=
3)
>=20=20=20=20
>    commit 0f55db36d49d45b80eff0c0a2a498766016f458b upstream.
>=20=20=20=20
>    Otherwise the driver may try and send audio which may confuse the
>    monitor.
>=20=20=20=20
>    v2: set pin to NULL if no audio
>    v3: avoid crash with analog encoders
>=20=20=20=20
>    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>>
>
>:040000 040000 de0366a6790f5c91d175bcb89cb34956bbe72b26 >bbdb5734961f82455=
8152c7c34a840c78bc3a9a9 M	drivers

--=20
You are receiving this mail because:
You are the assignee for the bug.

--1432736082.dc7df0.32682
Date: Wed, 27 May 2015 14:14:42 +0000
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<html>
    <head>
      <base href=3D"https://bugs.freedesktop.org/" />
    </head>
    <body><table border=3D"1" cellspacing=3D"0" cellpadding=3D"8">
        <tr>
          <th>Bug ID</th>
          <td><a class=3D"bz_bug_link=20
          bz_status_NEW "
   title=3D"NEW - Radeon Kernel Oops &amp; Lockup when switching on Display=
Port attached monitor"
   href=3D"https://bugs.freedesktop.org/show_bug.cgi?id=3D90681">90681</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Radeon Kernel Oops &amp; Lockup when switching on DisplayPort=
 attached monitor
          </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>major
          </td>
        </tr>

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

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

        <tr>
          <th>Assignee</th>
          <td>dri-devel&#64;lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>bradfirj&#64;fstab.me
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=3D""><a href=3D"attachment.cgi?id=3D116079=
" name=3D"attach_116079" title=3D"journalctl output for crash">attachment 1=
16079</a> <a href=3D"attachment.cgi?id=3D116079&amp;action=3Dedit" title=3D=
"journalctl output for crash">[details]</a></span>
journalctl output for crash

Switching my DisplayPort attached monitor on (or off and then on again) whi=
le
booted to multiuser target (no Xorg or Wayland) causes a kernel Oops, follo=
wed
by soft-lockups which render the system unusable.

Doing the same while at the full Graphical target causes gnome-shell to cra=
sh,
but it is possible to recover the system by logging in again.

The kernel error and IP are:
<span class=3D"quote">&gt;May 24 23:25:28 fedora-workstation.home kernel: B=
UG: unable to handle kernel NULL pointer dereference at 00000000000003b0
&gt;May 24 23:25:28 fedora-workstation.home kernel: IP: [&lt;ffffffffa01520=
55&gt;] radeon_connector_edid+0x5/0x70 [radeon]</span >

Full journal from a reproduction of the bug will be attached, as will lspci
-nn.

I have isolated this using git bisect to the following commit (the patch for
which is attached to this bug).
This is a commit currently part of the linux-stable tree and lies between 4=
.0.2
and 4.0.3

<span class=3D"quote">&gt;016a255b7835ee7e49a3eba3c14ba0bc0221a4f8 is the f=
irst bad commit
&gt;commit 016a255b7835ee7e49a3eba3c14ba0bc0221a4f8
&gt;Author: Alex Deucher &lt;<a href=3D"mailto:alexander.deucher&#64;amd.co=
m">alexander.deucher&#64;amd.com</a>&gt;
&gt;Date:   Tue Apr 7 09:52:42 2015 -0400</span >
&gt;
<span class=3D"quote">&gt;    drm/radeon: only mark audio as connected if t=
he monitor supports it (v3)
&gt;=20=20=20=20
&gt;    commit 0f55db36d49d45b80eff0c0a2a498766016f458b upstream.
&gt;=20=20=20=20
&gt;    Otherwise the driver may try and send audio which may confuse the
&gt;    monitor.
&gt;=20=20=20=20
&gt;    v2: set pin to NULL if no audio
&gt;    v3: avoid crash with analog encoders
&gt;=20=20=20=20
&gt;    Signed-off-by: Alex Deucher &lt;<a href=3D"mailto:alexander.deucher=
&#64;amd.com">alexander.deucher&#64;amd.com</a>&gt;
&gt;    Signed-off-by: Greg Kroah-Hartman &lt;<a href=3D"mailto:gregkh&#64;=
linuxfoundation.org">gregkh&#64;linuxfoundation.org</a>&gt;&gt;</span >
&gt;
<span class=3D"quote">&gt;:040000 040000 de0366a6790f5c91d175bcb89cb34956bb=
e72b26 &gt;bbdb5734961f824558152c7c34a840c78bc3a9a9 M	drivers</span ></pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
=20=20=20=20=20=20
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>

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