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<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 - [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93055">93055</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>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>paulepanter@users.sourceforge.net
</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></table>
<p>
<div>
<pre>Using Ubuntu 15.10 with the proprietary NVIDIA driver, when plugging in the
external monitor using Unity, X crashes quits (<a class="bz_bug_link
bz_status_NEW "
title="NEW - X crash when plugging in vga"
href="show_bug.cgi?id=93044">bug #93044</a>) and the login screen
is shown again.
The Linux i915 shows the following error messages.
```
[ 14.272749] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.272816] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.272862] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.272906] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.272951] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.273110] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.273252] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.273298] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.379592] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[ 14.425157] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.614149] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 14.639431] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.639638] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.639835] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 14.640004] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 17.953797] Bluetooth: RFCOMM TTY layer initialized
[ 17.953804] Bluetooth: RFCOMM socket layer initialized
[ 17.953807] Bluetooth: RFCOMM ver 1.11
[ 17.982058] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full Duplex, Flow
Control: None
[ 17.982149] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
[ 40.845621] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 40.845662] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[ 40.847192] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 40.847232] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 40.995011] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.034905] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035010] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035096] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035171] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035234] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035403] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035559] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.035617] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 41.099075] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20150619/nsarguments-95)
[ 42.633352] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 42.633368] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[ 42.641986] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 42.641999] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 44.506683] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 44.506699] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[ 44.516557] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 44.516574] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 59.152180] show_signal_msg: 39 callbacks suppressed
[ 59.152185] compiz[2643]: segfault at 7f1ecdcea5c0 ip 00007f1ecbcc81cb sp
00007ffcbebb82a0 error 4 in libc-2.21.so[7f1ecbc49000+1c0000]
[ 60.694512] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 60.694527] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[ 60.705547] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 60.705560] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[ 62.500059] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 62.500072] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
[ 62.511028] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe B
[ 62.511037] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
```
[1] <a class="bz_bug_link
bz_status_NEW "
title="NEW - X crash when plugging in vga"
href="show_bug.cgi?id=93044">https://bugs.freedesktop.org/show_bug.cgi?id=93044</a></pre>
</div>
</p>
<hr>
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<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
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