[Goodies-dev] [Bug 10599] New: diskperf panel plugin causes xbmc playback to fluctuate

bugzilla-daemon at xfce.org bugzilla-daemon at xfce.org
Fri Jan 3 20:00:01 CET 2014


https://bugzilla.xfce.org/show_bug.cgi?id=10599

            Bug ID: 10599
           Summary: diskperf panel plugin causes xbmc playback to
                    fluctuate
    Classification: Panel Plugins
           Product: Xfce4-diskperf-plugin
           Version: unspecified
          Hardware: PC (x86_64)
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Medium
         Component: General
          Assignee: frivoal at xfce.org
          Reporter: citizen53 at ziggo.nl
        QA Contact: goodies-dev at xfce.org

I realize this is bug sounds unlikely, but I've tested extensively and I can
assure you it exists.

When I add panel items for the 3 disks in my system (including the disk that
contains media files) and configure them for 1s update, xbmc playback starts to
fluctuate.

Details:
Media is on a Linux RAID, /dev/md0
Panel item device is set to the raw device, /dev/md0
Update interval is set to 1s
Combine read/write is unticked
Max I/O rate (MiB/s) is set to 600 (not that it matters, but its a fast RAID-0
set of disks)

This panel items' configuration has been tested on 4 different profiles,
ranging from clean to months old. Each time when these panel items were added
XMBC playback started to fluctuate.

XBMC settings (~/.xbmc) has been removed to exclude coincidence with
combination of settings.

XBMC has been configured to match refresh rate to playback fps. So playing a
23.976 or 24fps movie will set refresh rate on the television of the same hz).

During playback in XMBC, press 'o' for CodecInfo. If TV/Monitor supports the
refresh rate, fps should match the hz and should be stable at 23.95-23.98.

With the panel items added, fps will fluctuate between somewhere between 22 and
24 and the movie will show jutters.

Please contact me for more info, I'm willing to test different settings.

The problem has been posted here as well on the xbmc forums. Xbmc debug logging
available as well:
http://forum.xbmc.org/showthread.php?tid=179915&pid=1569096#pid1569096

Thanks in advance!

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