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    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Random loss of video output, laptop connected via docking station to two external (DVI, VGA) monitors rotated in portrait mode"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80008">80008</a>
          </td>
        </tr>

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

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

        <tr>
          <th>Summary</th>
          <td>Random loss of video output, laptop connected via docking station to two external (DVI, VGA) monitors rotated in portrait mode
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>ilakast@yahoo.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86 (IA32)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>XOrg CVS
          </td>
        </tr>

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

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When video output is lost, Fn+F7 does not help restoring video into the
internal laptop LCD either. Only switching off completely and rebooting is the
solution at the moment.

Jun 13 15:32:23 t61 kernel: [ 1118.433678] perf samples too long (2507 > 2500),
lowering kernel.perf_event_max_sample_rate to 50000
Jun 13 16:10:44 t61 kernel: [ 3419.215660] perf samples too long (5024 > 5000),
lowering kernel.perf_event_max_sample_rate to 25000
Jun 13 23:33:15 t61 kernel: [29969.988053] [drm] stuck on render ring
Jun 13 23:33:15 t61 kernel: [29969.988059] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Jun 13 23:33:15 t61 kernel: [29969.988061] [drm] GPU hangs can indicate a bug
anywhere in the entire gfx stack, including userspace.
Jun 13 23:33:15 t61 kernel: [29969.988063] [drm] Please file a _new_ bug report
on bugs.freedesktop.org against DRI -> DRM/Intel
Jun 13 23:33:15 t61 kernel: [29969.988064] [drm] drm/i915 developers can then
reassign to the right component if it's not a kernel issue.
Jun 13 23:33:15 t61 kernel: [29969.988066] [drm] The gpu crash dump is required
to analyze gpu hangs, so please always attach it.
Jun 13 23:33:15 t61 kernel: [29969.989045] [drm:i915_set_reset_status] *ERROR*
render ring hung inside bo (0xc464000 ctx 0) at 0xc464794
Jun 13 23:33:15 t61 kernel: [29970.060089] [drm] GMBUS [i915 gmbus vga] timed
out, falling back to bit banging on pin 2
Jun 13 23:33:15 t61 kernel: [29970.496078] [drm:i915_reset] *ERROR* Failed to
reset chip.
Jun 13 23:33:42 t61 kernel: [29997.054531] ------------[ cut here ]------------
Jun 13 23:33:42 t61 kernel: [29997.054573] WARNING: CPU: 0 PID: 326 at
/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:922 ass$
Jun 13 23:33:42 t61 kernel: [29997.054576] PLL state assertion failure
(expected on, current off)
Jun 13 23:33:42 t61 kernel: [29997.054578] Modules linked in: bnep rfcomm
bluetooth snd_hda_codec_analog hid_generic usbhid hid coretemp kvm_i$
Jun 13 23:33:42 t61 kernel: [29997.054624] CPU: 0 PID: 326 Comm: kworker/0:2
Not tainted 3.13.0-29-generic #53-Ubuntu
Jun 13 23:33:42 t61 kernel: [29997.054626] Hardware name: LENOVO
8896W8T/8896W8T, BIOS 7LETC9WW (2.29 ) 03/18/2011
Jun 13 23:33:42 t61 kernel: [29997.054633] Workqueue: kacpi_notify
acpi_os_execute_deferred
Jun 13 23:33:42 t61 kernel: [29997.054635]  00000000 00000000 f2779cb4 c164f613
f2779cf4 f2779ce4 c10567ee f8db2210
Jun 13 23:33:42 t61 kernel: [29997.054643]  f2779d10 00000146 f8db0b64 0000039a
f8d5ed03 f8d5ed03 00000001 00000001
Jun 13 23:33:42 t61 kernel: [29997.054649]  00000000 f2779cfc c1056843 00000009
f2779cf4 f8db2210 f2779d10 f2779d20
Jun 13 23:33:42 t61 kernel: [29997.054656] Call Trace:
Jun 13 23:33:42 t61 kernel: [29997.054664]  [<c164f613>] dump_stack+0x41/0x52
Jun 13 23:33:42 t61 kernel: [29997.054670]  [<c10567ee>]
warn_slowpath_common+0x7e/0xa0
Jun 13 23:33:42 t61 kernel: [29997.054693]  [<f8d5ed03>] ? assert_pll+0x73/0x80
[i915]
Jun 13 23:33:42 t61 kernel: [29997.054714]  [<f8d5ed03>] ? assert_pll+0x73/0x80
[i915]
Jun 13 23:33:42 t61 kernel: [29997.054719]  [<c1056843>]
warn_slowpath_fmt+0x33/0x40
Jun 13 23:33:42 t61 kernel: [29997.054741]  [<f8d5ed03>] assert_pll+0x73/0x80
[i915]
Jun 13 23:33:42 t61 kernel: [29997.054764]  [<f8d643ca>]
intel_crtc_load_lut+0x19a/0x1b0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054785]  [<f8d5c3e5>] ?
assert_panel_unlocked+0xa5/0xb0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054807]  [<f8d645ab>]
i9xx_crtc_enable+0x1cb/0x3a0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054830]  [<f8d66bfc>]
__intel_set_mode+0x75c/0x8b0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054855]  [<f8d6c1ba>]
intel_modeset_setup_hw_state+0x9da/0xae0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054880]  [<f8d6dfb9>]
intel_lid_notify+0x99/0xe0 [i915]
Jun 13 23:33:42 t61 kernel: [29997.054884]  [<c1659f91>]
notifier_call_chain+0x41/0x60
Jun 13 23:33:42 t61 kernel: [29997.054889]  [<c10797ab>]
__blocking_notifier_call_chain+0x3b/0x60
Jun 13 23:33:42 t61 kernel: [29997.054893]  [<c10797ef>]
blocking_notifier_call_chain+0x1f/0x30
Jun 13 23:33:42 t61 kernel: [29997.054897]  [<c1394d16>]
acpi_lid_send_state+0x78/0xa3
Jun 13 23:33:42 t61 kernel: [29997.054901]  [<c139510a>]
acpi_button_notify+0x3c/0xd5
Jun 13 23:33:42 t61 kernel: [29997.054905]  [<c1370a26>]
acpi_device_notify+0x16/0x18
Jun 13 23:33:42 t61 kernel: [29997.054910]  [<c137ec53>]
acpi_ev_notify_dispatch+0x35/0x4a
Jun 13 23:33:42 t61 kernel: [29997.054913]  [<c136d1dd>]
acpi_os_execute_deferred+0x11/0x1c
Jun 13 23:33:42 t61 kernel: [29997.054917]  [<c106eb4b>]
process_one_work+0x11b/0x3b0
Jun 13 23:33:42 t61 kernel: [29997.054921]  [<c1063562>] ?
mod_timer+0x112/0x1c0
Jun 13 23:33:42 t61 kernel: [29997.054925]  [<c106f749>]
worker_thread+0xf9/0x380
Jun 13 23:33:42 t61 kernel: [29997.054928]  [<c106f650>] ?
rescuer_thread+0x340/0x340
Jun 13 23:33:42 t61 kernel: [29997.054932]  [<c1074f41>] kthread+0xa1/0xc0
Jun 13 23:33:42 t61 kernel: [29997.054937]  [<c165d877>]
ret_from_kernel_thread+0x1b/0x28
Jun 13 23:33:42 t61 kernel: [29997.054940]  [<c1074ea0>] ?
kthread_create_on_node+0x150/0x150
Jun 13 23:33:42 t61 kernel: [29997.054943] ---[ end trace 5e7f4fcd51e4d9aa ]---
Jun 13 23:33:42 t61 kernel: [29997.054986] ------------[ cut here ]------------

the file /sys/class/drm/card0/error contains : no error state collected

drm version: 1.1.0 20060810

OS: Xubuntu</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
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          <li>You are the QA Contact for the bug.</li>
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          <li>You are the assignee for the bug.</li>
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