Playing CDs -- KDE problem, or Amarok problem?

[Myriam Schweingruber]

On Sat, May 22, 2010 at 04:28, Valorie Zimmerman
<valorie.zimmerman at gmail.com> wrote:
> On Fri, May 21, 2010 at 3:45 AM, Valorie Zimmerman
> <valorie.zimmerman at gmail.com> wrote:
>> Hearing of another complaint about playing CDs in Amarok, I tried one,
>> without success. http://amarok.pastebin.ca/1872532 for the very
>> strange output.
>>
>> Since the IRC channel has been quiet, due to many of the developers
>> being on the road to Randa, I also mentioned this issue in
>> #kubuntu-devel, and here is some of the discussion following:
>>
>> [14:17] <rgreening> [23:54:24] Riddell: CD Audio in general appears
>> broken. Kaffiene, Dragon and Amarok all fail to play Audio CD's. Well,
>> Kaffiene plays the first song and I cannot skip to any other songs.
>> [14:17] <rgreening> [00:24:44] Riddell: kscd doesn't work either
>> [14:17] <rgreening> [00:25:09] only vlc works, which doesn't use the
>> KDE backends (iirc)
>> [14:17] <rgreening> [00:41:27] Riddell: looks to be a bug with KDE
>> looking for /dev/cdrom regardless of how Audio CD is configured in
>> system settings. On my system my cdrom shows up as /dev/cdrom4 ->
>> /dev/sr0. Seems it only works if I symlink /dev/cdrom -> /dev/sr0.
>> This is bad. Guess 1) udev rules needs a fix and 2) KDE need some
>> fixing to be not so restrictive?
>>
>> By the way, I'm using Amarok with the phonon-vlc backend. VLC itself
>> does work; that same CD plays in VLC.
>>
>> [14:17] <Riddell> [05:24:12] I expect /dev/cdrom stopped being useful
>> ages ago but solid is behind on these things
>> [14:17] <valorie> [05:25:17] so can I report to the Amarok users
>> complaining about this that it's a KDE bug which will be fixed?
>> [14:17] <Riddell> [05:39:36] valorie: I'm just guessing, it depends
>> where Amarok gets "/dev/cdrom" from, but there's probably some new
>> udevy interface that gives it the right answer which isn't being used
>> [14:17] <valorie> [05:44:26] but if: [20:58] <rgreening> Riddell: CD
>> Audio in general appears broken. Kaffiene, Dragon and Amarok all fail
>> to play Audio CD's. Well, Kaffiene plays the first song and I cannot
>> skip to any other songs.
>> [14:17] <Riddell> [05:44:53] so whatever is going wrong, it's
>> happening in other apps too :)
>> [14:17] <valorie> [05:45:01] right
>> [14:17] <valorie> [05:45:19] but if amarok fixes that, what happens
>> with the others?
>> [14:17] <valorie> [05:45:30] I know that few people play CDs on their computers
>> [14:17] <valorie> [05:45:37] but some do
>> [14:17] <Riddell> [05:45:59] we'd need to find out what the correct
>> low level method of finding out where your audio cd drive is these
>> days, what's the correct layer for that to be exposed in KDE (solid?)
>> and then whether the applications use that or not
>> [14:17] <Riddell> [05:46:37] and it may well involve porting solid
>> away from hal which is no small task
>>
>> When I mentioned that I would be sending all this to the list:
>>
>> [14:17] <Riddell> [05:52:21] feel free but remember it's just the
>> ramblings of an ill-informed distro packager :)
>>
>> Later: 14:17] <rgreening> [08:48:19] so, KDE seems to require/depend
>> on the Audio CD being the first configued device /dev/cdrom. That's
>> bad
>>
>> ...
>> [14:17] <rgreening> [09:03:19] agateau, JontheEchidna: running amarok
>> from cmdline and with "Specify CD Device" unchecked, amarok still does
>> this...
>> [14:17] <rgreening> [09:03:19] Checking /dev/cdrom for cdrom...
>> [14:17] <rgreening> [09:03:19]         Could not stat /dev/cdrom: No
>> such file or directory
>> [14:17] <rgreening> [09:03:23] grr
>> [14:17] <rgreening> [09:04:48] agateau, JontheEchidna: and checking
>> the box again but setting it to the correct /dev/cdrom1, amarok still
>> spits out looking for /dev/cdrom
>>
>> [14:17] <agateau> [09:51:20] rgreening: amarok from master does not play cd here
>> [14:17] <agateau> [09:51:29] rgreening: neither from cdrom nor from cdrom1
>> [14:17] <rgreening> [09:52:50] ok, so not a distro problem necessarily...
>> [14:17] <rgreening> [09:53:02] unless it's a udev/hal issue
>>
>> Perhaps someone here can shed light. It's annoying that CD playing is
>> lacking again.
>
> New paste, since pastebin.ca seems to have crashed. http://pastie.org/971665
>
> I'm filing a bug, which hopefully will be kicked up to KDE developers.

Please file it against the the product audiocd KIO slave. The last
changes made there I know of were by Albert, which at least made it
work for Amarok at some time, don't know what else has changed there
since.


Regards, Myriam.
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