Hi folks, don't know if this is OSX relatet but after i did a collection scan Amarok 2 used all of my CPU power, even after a restart!
the only thing i could find in the logfiles was this:
Dec 11 06:04:45 macbookpro [0x0-0x2ce2ce].Amarok[0]: kdeinit4: preparing to launch
Dec 11 06:04:45 macbookpro [0x0-0x2ce2ce].Amarok[0]: Could not find 'knotify4' executable.
Dec 11 06:04:45 macbookpro [0x0-0x3aa3aa].Amarok[64135]: amarok(64135): Couldn't start knotify from knotify4.desktop:  "KDEInit could not launch 'knotify4'.:
Dec 11 06:04:45 macbookpro [0x0-0x3aa3aa].Amarok[64135]: Could not find 'knotify4' executable."
Dec 11 06:04:45 macbookpro [0x0-0x3aa3aa].Amarok[64135]: amarok(64135)/kdeui (KNotification) KNotification::slotReceivedIdError: Error while contacting notify daemon "Failed to execute program /opt/local/bin/knotify4: Unknown error: 0"
11.12.08 06:04:44 [0x0-0x2ce2ce].Amarok kded(54640): Couldn't start kwalletd:  "KDEInit could not launch 'kwalletd'.:
11.12.08 06:12:33 Amarok[64234] Amarok(64234,0xa03e3fa0) malloc: *** mmap(size=3758100480) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
11.12.08 06:12:33 Amarok[64234] CGBitmapContextInfoCreate: unable to allocate 3758096384 bytes for bitmap data
11.12.08 06:12:33 Amarok[64234] CGContextTranslateCTM: invalid context
11.12.08 06:12:33 Amarok[64234] CGContextScaleCTM: invalid context
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] link XMLID_9_ hasn't been detected!
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Couldn't resolve property: linearGradient3563
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] link XMLID_9_ hasn't been detected!
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] link XMLID_9_ hasn't been detected!
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] link XMLID_9_ hasn't been detected!
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Qt: QPixmap: Invalid pixmap parameters
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Amarok(64234,0xa03e3fa0) malloc: *** mmap(size=3758100480) failed (error code=12)
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] *** error: can't allocate region
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] *** set a breakpoint in malloc_error_break to debug
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Thu Dec 11 06:12:33 macbookpro.local Amarok[64234] : CGBitmapContextInfoCreate: unable to allocate 3758096384 bytes for bitmap data
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] QPaintDevice: Unable to create context for pixmap (-1/-1/0)
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Thu Dec 11 06:12:33 macbookpro.local Amarok[64234] : CGContextTranslateCTM: invalid context
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] Thu Dec 11 06:12:33 macbookpro.local Amarok[64234] : CGContextScaleCTM: invalid context
11.12.08 06:12:33 [0x0-0x3ad3ad].Amarok[64234] QDir::exists: Empty or null file name
11.12.08 06:12:35 [0x0-0x3ad3ad].Amarok[64234] QGraphicsGridLayout::itemAt: invalid row, column 0, 1

We will keep a closer look on this, thanks.

Hello. I am having the same problem on openSUSE 11.1 (default amarok 2 installation) using KDE4. If there is some sort of info I could provide that might help, let me know!

I am having the same issue - CPU utilization moves up to 100% when a song is playing using Amarok 2.0.1.1.  As soon as I pause/stop the song, CPU returns to normal.

I'm using Ubuntu Intrepid with an AMD 2500+.

Thanks.

vanepelw not seeing this issue. Running Ubuntu Intrepid. Compiled source from SVN(as of Rev: 911684) and running on an old AMD Athon CPU. I show Amarok is only using around 3% CPU while playing.