Comment 7 for bug 1769848

K3b also does not work for none-root user any longer.
K3b (Format/Erase rewriteable disk..)-> wodim: Operation not permitted

System
-----------------------
K3b Version: 17.12.3
KDE Version: 5.44.0
Qt Version: 5.9.5
Kernel: 4.15.0-38-generic

Used versions
-----------------------
cdrecord: 1.1.11

cdrecord
-----------------------
/usr/bin/wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.
/usr/bin/wodim: Resource temporarily unavailable. Cannot get mmap for 12587008 Bytes on /dev/zero.
TOC Type: 1 = CD-ROM

cdrecord command:
-----------------------
/usr/bin/wodim -v gracetime=2 dev=/dev/sr0 speed=10 -tao driveropts=burnfree blank=fast

LSB Version: core-9.20170808ubuntu1-noarch:printing-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
marcus@saturn:~$

Linux saturn 4.15.0-38-generic #41-Ubuntu SMP Wed Oct 10 10:59:38 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux