Brasero writes slow when 'Maximum Speed' set for DVD disc

[Phil Wyett]

Ubuntu Gnome - 14.04 dev release - 20131218.

Brasero writes slow when 'Maximum Speed' set for DVD disc.

When set to wrtie a DVD at 'Maximum Speed' (default) my LG SATA writer writes at less than 2.0x. If write is manually set to 8.0x or 16.0x, the write speed is as expected based on the quality of media being used.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: brasero 3.8.0-1ubuntu3
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic x86_64
ApportVersion: 2.12.7-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Dec 19 05:39:20 2013
InstallationDate: Installed on 2013-12-19 (0 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20131218)
SourcePackage: brasero
UpgradeStatus: No upgrade log present (probably fresh install)

[Phil Wyett (aura-yoda)]

DVD writer is SATA - HL-DT-ST DVDRAM GH24NS95 (RN01).

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rowland Barkley (masterexorcist)]

After upgrading to Ubuntu 14.04, brasero has taken 2 hours to write halfway through 1 DVD, speed 0.1x.

[Alexander Lindo (alexanderlindo)]

This bug is still present in Ubuntu 14.10. K3B burns disks at 8x while Brasero burns at 1-2x.

[Habib MAALEM (habib-maalem)]

I have the same issue in Ubuntu 15.10

[StoatWblr (stoatwblr)]

Still present in 15.10 and 16.04 beta.

[Anthony (danthonyd)]

Same problem for me. Maximum speed burns at 1.5x - 2.5x continuously fluctuating up then down. I switched the DVD burner and tried 4 DVDs with the same result. Worse yet, manually choosing write speed gives me the options of 4x, 2 identical options of 8x, and 2 identical options of 16x. I randomly chose one of the 8x options and again, same slow result.

K3b burned an entire DVD in a little over 5 minutes, achieving 16x which it auto selected, which means the troubleshooting aims straight at Brasero.

Brasero was great before, but something changed. ISO images appear to burn normally, at least my last image burn was okay about a month ago. But making a data DVD was terribly slow.

Info:
Ubuntu 14.04 LTS
DVD disk type: Kodak DVD-R (Ksb burn it with no problems)
Burners:
1) Hitachi/LG GSA-H60N 16x DVD±RW DL SATA Drive
2) Hitachi-LG GH10N SATA 16X Multi Recorder DVD+R DL DVD-RW Drive LGE-DMGH12L(B)
Attempted to create data DVD with .avi and .mp4 video files