confirmed identical behaviour with brasero.
with the brasero run, I generated monitor output (attached).
discovered from monitor log that kernel is generating lots of events as soon as
burning starts. First a lot of scsi events (3-5/sec), then a burst of block
events (about 200 events in about one tenth of a second!) and then again lots
of scsi events
KERNEL[1265369955.606570] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[1265369956.098726] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[1265369956.525988] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[1265369956.931286] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[1265369956.945761] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0 (scsi)
KERNEL[1265369956.962205] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0/block/sr0 (block)
KERNEL[1265369956.962288] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0/block/sr0 (block)
KERNEL[1265369956.962433] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0/block/sr0 (block)
KERNEL[1265369956.964279] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0/block/sr0 (block)
KERNEL[1265369956.964362] change
/devices/pci0000:00/0000:00:09.0/host2/target2:0:0/2:0:0:0/block/sr0 (block)
--
excessive udev activity during dvd burning
https://bugs.launchpad.net/bugs/517216
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