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List:       kde-multimedia
Subject:    [Bug 122524] kio_audiocd status update affects audio CD playback
From:       Tobias <ulbricht.tobias () web ! de>
Date:       2008-05-15 21:26:14
Message-ID: 20080515212614.29236.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=122524         




------- Additional Comments From ulbricht.tobias web de  2008-05-15 23:26 -------
I still have an (maybe the same) problem.
Symptoms: 
1. kscd/cdplay stops playing not using digital playback
2. kscd has skips (~100ms) using digital playback
3. beside the source code, it is very hard to find documentation about kio_audiocd. \
Is there any?

Problem:
* It seems kio_audiocd is gathering information from the optical drive.
* kscd stops playing, at the same time kio_audiocd disappears automatically from the \
process list. Thus kio_audiocd seems to stop the playback when it quits itself.

Background:
* Kubuntu, happened in all releases since I installed it, from 5.10 (breezy badger) \
                to 8.04 (hardy heron, KDE3)
* The non-digital playback also stops using cdplay from the cdtools package, so kscd \
                is not the problem.
* The digital playback on amarok works. 
* I surveilled access to /dev/scd0 using lsof:
* I can view kio_audiocd at work, if I start another kdeinit in a console.
* On cdclose, kio_audiocd does:
kdecore (KLibLoader): WARNING: KLibrary: /usr/lib/kde3/libaudiocd_encoder_flac.so: \
undefined symbol: create_audiocd_encoders Checking /dev/scd0 for cdrom...
        Testing /dev/scd0 for SCSI/MMC interface
                SG_IO device: /dev/scd0

CDROM model sensed sensed: _NEC DVD_RW ND-3520AW 3.07

Checking for SCSI emulation...
        Drive is ATAPI (using SG_IO host adaptor emulation)

Checking for MMC style command set...
kdecore (KLibLoader): WARNING: KLibrary: /usr/lib/kde3/libaudiocd_encoder_flac.so: \
undefined symbol: create_audiocd_encoders  Drive is MMC style
        DMA scatter/gather table entries: 1
        table entry size: 131072 bytes
        maximum theoretical transfer: 55 sectors
        Setting default read size to 13 sectors (30576 bytes).

Verifying CDDA command set...
Checking /dev/scd0 for cdrom...
        Testing /dev/scd0 for SCSI/MMC interface
<...>

Does not help:
* setting /dev/scd0 from 660 to 440 

Helps:
* Under control center service administration I can disable the KDE(d?) service \
mediaadministration (which surveils media:/ mount/umount etc.) then the symptoms are \
completely gone. Also no kio_audiocds are spawned (Thus it makes sense to say \
                kio_audiocd is the evil).
* Above does not help the skipping in the digital playback. Thus kscd seems to be the \
evil with digital playback.

If there is anything one can do, can you please help me, e.g.
* How to disable kio_audiocd completely and not disabling the whole media:/ \
                handling...
* How to configure behaviour of kio_audiocd (systemwide)?

Grateful for any response, 
marvin
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