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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Intel Video Driver V2.99.917 Does not support multiple video playback using XVideo on Skylake"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94559">94559</a>
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<th>Summary</th>
<td>Intel Video Driver V2.99.917 Does not support multiple video playback using XVideo on Skylake
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>critical
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ibr@wegener.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Hello.
We have run into a issue with the XV implementation on Skylake using the intel
video driver V2.99.917.
Looking at the source we found Skylake processors are initialised with a
generic SNA backend.
This causes video related setup to baseline, yielding only a single video
sprite adapter and port.
Playing more than one video with the X Video extension (XV) will then fail
because the video player cannot grab an available port.
XV is a pretty core part of doing video on the X Windows system. On older
hardware such as Haswell, a textured video adapter and many ports are
initialized by the driver, and thus Haswell does not have this limitation.
Tests to reproduce the XV Bug on a Intel Skylake G4400 or I5-6400 with Intel
Driver 2.99.917
Try play more than one instance of video using the XV backend:
Gstreamer:
gst-launch-1.0 filesrc location=testvideo.mp4 ! decodebin ! xvimagesink
MPV
mpv --hwdec=vaapi -vo=xv testvideo.mp4
Printout of XV
X-Video Extension version 2.2
screen #0
Adaptor #0: "Intel(R) Video Sprite"
number of ports: 1
port base: 75
operations supported: PutImage
supported visuals:
depth 24, visualID 0x20
number of attributes: 2
"XV_COLORKEY" (range 0 to 16777215)
client settable attribute
client gettable attribute (current value is 66046)
"XV_ALWAYS_ON_TOP" (range 0 to 1)
client settable attribute
client gettable attribute (current value is 0)
maximum XvImage size: 8192 x 8192
Number of image formats: 3
id: 0x32595559 (YUY2)
guid: 59555932-0000-0010-8000-00aa00389b71
bits per pixel: 16
number of planes: 1
type: YUV (packed)
id: 0x59565955 (UYVY)
guid: 55595659-0000-0010-8000-00aa00389b71
bits per pixel: 16
number of planes: 1
type: YUV (packed)
id: 0x18424752
guid: 50415353-5448-524f-5547-485247423234
bits per pixel: 32
number of planes: 1
type: RGB (packed)
depth: 24
red, green, blue masks: 0xff0000, 0xff00, 0xff
This particular bug is having a seriously negative impact on UP Stream
Packages.
There have been distribution packages incorporating patches to disable loading
the Intel driver plus SNA in favour of GLAMOR and some kind of more generic
mode setting driver built into X.Org; GLAMOR currently has it's own issues.
Both
Red Hat: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1305369">https://bugzilla.redhat.com/show_bug.cgi?id=1305369</a>
Debian following suite:
<a href="http://anonscm.debian.org/cgit/pkg-xorg/driver/xserver-xorg-video-intel.git/commit/?id=e43d5b2191c5d9695e29ad2f5ac16c15dc1d9543">http://anonscm.debian.org/cgit/pkg-xorg/driver/xserver-xorg-video-intel.git/commit/?id=e43d5b2191c5d9695e29ad2f5ac16c15dc1d9543</a>
Have tried to skirt the issue with the Intel XV implementation in favor of
Glamor but on Skylake (Gen 9) Glamor does not offer the same level of
capabilities as Intel SNA on previous chipsets (e.g. Gen 8 and Gen 7).
Thanks Paul</pre>
</div>
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