Have just encountered the same problem myself. Manifested itself as growisofs ceasing to function following an upgrade from gutsy to hardy (I hadn't tried to write a DVD for some time after the upgrade). Same problem occurred with the intrepid and jaunty versions of growisofs. Using TDK DVD-R media on a Philips PBDV1640P revision B3.4. After much messing around I discovered that omitting the -dvd-compat switch from the growisofs command line makes it work... so the command I ended up running was: $ growisofs -Z /dev/scd0=foo.iso Proof that it worked: $ md5sum foo.iso /dev/scd0 a7e18f22eb98f8d62caf1ffcb30c70dc foo.iso a7e18f22eb98f8d62caf1ffcb30c70dc /dev/scd0 dvdrecord didn't work either and I couldn't make it work; sample of output: $ dvdrecord -v driveropts=burnfree speed=1 dev=1,0,0 -dao foo.iso dvdrtools v0.3.1 Portions (C) 2002-2006 Ark Linux