I have the same problem and solution (kill the process gnome-power-
statistics)
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https://bugs.launchpad.net/bugs/968383
Title:
gnome-power-statistics show
now I remember why I'm using k3b... I have the following output from
lshw:
*-cdrom
descripción: DVD-RAM writer
producto: DVD A DS8A4SH
fabricante: Slimtype
id físico: 1
información del bus: scsi@1:0.0.0
affects to cdrdao too:
$: sudo cdrdao blank --device /dev/sr0
Cdrdao version 1.2.3 - (C) Andreas Mueller
ERROR: Unable to open SCSI device /dev/sr0: Device or resource busy.
ERROR: Please use option '--device {[proto:]bus,id,lun}|device', e.g. --device
0,6,0, --device ATA:0,0,0 or --device /dev
after a new try to cdrdao the output was:
$: sudo cdrdao blank --device /dev/sr0
Cdrdao version 1.2.3 - (C) Andreas Mueller
/dev/sr0: Slimtype DVD A DS8A4SH Rev: CA11
Using driver: Generic SCSI-3/MMC - Version 2.0 (options 0x)
Blanking disk...
ERROR: Cannot erase CD-RW.
ERROR: Blanki