Public bug reported:

When trying to burn a data project with Brasero it exits with "unknown
error". In the log file it says the following:

BraseroWodim stderr: wodim: Operation not permitted. Warning: Cannot raise 
BraseroWodim called brasero_job_get_flags
BraseroWodim stderr: wodim: Resource temporarily unavailable. Cannot get mmap 
for 16781312 Bytes on /dev/zero.
BraseroWodim called brasero_job_get_flags
BraseroWodim stdout: TOC Type: 1 = CD-ROM
BraseroWodim stderr: HUP
BraseroWodim stdout: HUP
BraseroWodim process finished with status 11
BraseroWodim called brasero_job_error
BraseroWodim finished with an error
BraseroWodim asked to stop because of an error
        error           = 0
        message = "no message"
BraseroWodim stopping
Session error : unknown (brasero_burn_record brasero-burn.c:2859)

Current user is a member of the cdrom group.

As a workaround I set setuid bit on /usr/bin/wodim, after that Brasero
was able to burn the DVD.

sudo chmod +s $(which wodim)

As far as I remember DVD burning used to work on Ubuntu 17.10.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: brasero 3.12.1-4ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Apr 15 16:23:20 2018
InstallationDate: Installed on 2018-03-17 (28 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180316)
SourcePackage: brasero
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: brasero (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug bionic

** Attachment added: "Brasero log"

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  Brasero can't burn DVD because of permissions issue

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