Bug 528375

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Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 is 
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Still reproduces with F13: brasero-2.30.2-1.fc13.x86_64.

In addition to note in original report:
Tested also by creating a data project to write files from hard disk.

Also reported for Fedora 12 as Bug 565984.

I've seen some speed inconsistencies with Brasero in pretty much every Fedora release where I have used it (began using it in Fedora 9, I think, previously I used K3B).

I've made a few test cases, and noticed some rather ugly and erratic behaviour of Brasero.

1. Brasero doesn't seem to enable Burnproof (Burnfree) buffer under-run protection by default, nor there seems to be a configurable option to tell it to use it always, neither in the GUI nor the GConf preferences, or not that I've been able to find (up to Fedora 13, I have yet to test in 14, though I'm pretty sure the situation won't have changed... much)

2. It only writes at full speed... when you burn from an image or allow it to create an image of the content you want prior to actually burn it. Burning files "on-the-fly" results in a highly erratic speed, and usually stays very, very low. Often times when this happens data is corrupted in the disk. By contrast if I manually call cdrecord/wodim/etc and set burnfree and a rather large FIFO (~250 Mb) data burns at the requested speed just fine, device buffer never empties, some times the FIFO varies and I've not seen a case of data corruption.

Apparently you can only enable Burnfree when burning from the contextual menu in Nautilus, and often times I have the option greyed out. Just tried with some files and with an image, with the image I get the option when mastering the files with the burn:/// URI in Nautilus, and try to burn on-the-fly I cannot enable burnfree.

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and issuing updates for Fedora 13.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
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plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 13's end of life.

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we may not be able to fix it before Fedora 13 is end of life.  If you 
would still like to see this bug fixed and are able to reproduce it 
against a later version of Fedora please change the 'version' of this 
bug to the applicable version.  If you are unable to change the version, 
please add a comment here and someone will do it for you.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events.  Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

The process we are following is described here: 
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Reproduced with F15 X86_64.
Not dependent of hardware.
Now tested also with burning a data disk directly without creating an image file first.

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Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
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The process we are following is described here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping