Hi, i am the developer of libburn, which would probably be in charge for burning underneath Brasero in younger Ubuntu versions. (One can learn from Brasero logs, whether libburn is used as burn backend. Search for "Libburn".)
There was a bug when the application asked for minimum speed and the firmware of the burner drive incorrectly answered to the SCSI command that inquires the number of offered speed values. That bug is fixed in libburn-1.2.8. I cannot say whether Brasero did ask libburn for minimum speed rather than for a particular speed value. If it did, then the libburn bug would explain the use of maximum speed. But given the original report, that Brasero offered speed 10 for CD-RW with label "1-4x" and that the user has chosen "4", i doubt that Brasero triggered the libburn bug. Possibly in 2010 it still used wodim a burn backend for CDs and growisofs for DVDs. In case the bug still persists, i offer my help with investigating Brasero's doings. I am not a user of Brasero myself and my Debian 6 test machine has quite an old version installed. (It is not easy to upgrade Brasero without upgrading the operating system.) I would need a tester who has a much newer version of Brasero. Further we would have to find a publicly readable repository with the source code of that Brasero version. Advise from Ubuntu experts would be welcome in this case. ---------------------------------------------------------------- The youngest post of 2013-01-20 by paolode does not look like a speed problem: > doesn't burn correctly dvds (it is like it enters in an infinite cycle; If libburn is involved as backend, then i would propose to do experiments with my own command line burn applications cdrskin or xorriso which can report the commands and replies of the SCSI dialog between libburn and burner drive. Both are offered by Ubuntu using the same libburn version as Brasero. If newer versions are needed for the test, then it should make few problems to compile them without disturbing the installed dynamic libburn. (Installing libburn.so from source will probably need an Ubuntu expert.) If libburn is ok - which i assume - then one would again have to inspect the source code of Brasero for the way how it uses libburn. Possibly one will have to insert the libburn call which enables the SCSI log. This will require recompilation of Brasero which might become an adventure on its own. ---------------------------------------------------------------- I am now subscribed to this Ubuntu bug report 656297. You may also contact me via scdbac...@gmx.net . Have a nice day :) Thomas -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to brasero in Ubuntu. https://bugs.launchpad.net/bugs/656297 Title: Brasero always burns CD/DVD at max speed (speed option is ignored) To manage notifications about this bug go to: https://bugs.launchpad.net/brasero/+bug/656297/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs