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<base href="https://bugs.freedesktop.org/" />
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<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 --- - [BYT]udevadm unable to monitor HDMI plug/unplug event sporadically"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82593">82593</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>[BYT]udevadm unable to monitor HDMI plug/unplug event sporadically
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=104597" name="attach_104597" title="dmesg">attachment 104597</a> <a href="attachment.cgi?id=104597&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
I didn't find good commit.
Non-working platforms: BYT
==kernel==
--------------------------
origin/drm-intel-nightly: da31e7c60be217316278a055dd3f91c33913270f(fails)
drm-intel-nightly: 2014y-08m-13d-17h-12m-37s integration manifest
origin/drm-intel-next-queued: 82e3b8c130f046b7dd1e7898c10e40edb52fee6d(fails)
drm/i915: Localise the fbdev console lock frobbing
origin/drm-intel-fixes: be71eabebaf9f142612d34d42292b454e984dcb5(fails)
Revert "drm/i915: Enable semaphores on BDW"
==Bug detailed description==
-----------------------------
udevadm unable to monitor HDMI plug/unplug event sometimes. It works well while
plug/unplug VGA cable.
HDMI monitor is able to display.
Output:
root@x-bytm02:~# udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
Sometimes message below will print out after a while.
KERNEL[429.925536] add /devices/virtual/bdi/0:27 (bdi)
UDEV [429.926843] add /devices/virtual/bdi/0:27 (bdi)
KERNEL[430.636487] remove /devices/virtual/bdi/0:27 (bdi)
UDEV [430.636744] remove /devices/virtual/bdi/0:27 (bdi)
KERNEL[430.893520] add /devices/virtual/bdi/0:27 (bdi)
UDEV [430.894314] add /devices/virtual/bdi/0:27 (bdi)
KERNEL[431.445422] remove /devices/virtual/bdi/0:27 (bdi)
UDEV [431.445819] remove /devices/virtual/bdi/0:27 (bdi)
KERNEL[431.656988] add /devices/virtual/bdi/0:27 (bdi)
UDEV [431.657631] add /devices/virtual/bdi/0:27 (bdi)
KERNEL[432.480439] remove /devices/virtual/bdi/0:27 (bdi)
UDEV [432.480766] remove /devices/virtual/bdi/0:27 (bdi)
Reproduce steps:
-------------------------
1. udevadm monitor
2. plug/unplug HDMI cable.</pre>
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