I am running Ubuntu 24.04 on an intel i7 with 16GB RAM and 500GB hard drive.
I can burn files on CDs and DVDs, but I cannot burn iso images to create bootable CDs. I have attempted to burn iso files to CDs and DVDs with 3 applications, all of which fail and give error messages,
Brasero and Burner give identical messages:
Please select another image. The format of the disc image could not be identified. Please set it
When attempting to burn the image it gives the following message:
*All required applications and libraries are not installed. * Please install the following manually and try again.
(But nothing follows.)
K3B gives the following errors: cdrecord has no permission to open the device Modify device settings in K3B to solve this problem
K3B debugging output gives /snap/k3b/35/usr/bin/wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits. scsidev: ‘/dev/sr0’ devname: ‘/dev/sr0’ scsibus: -2 target: -2 lun: -2 /snap/k3b/35/usr/bin/wodim: Permission denied. Cannot open SCSI driver! For possible targets try ‘wodim --devices’ or ‘wodim -scanbus’. For possible transport specifiers try ‘wodim dev=help’. For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from the wodim documentation. TOC Type: 1 = CD-ROM cdrecord command: ----------------------- /snap/k3b/35/usr/bin/wodim -v gracetime=2 dev=/dev/sr0 speed=48 -tao driveropts=burnfree -data -tsize=236544s -
Please help. I have 3 computers running Ubuntu 24.04 with the same problem.
What is the purpose of this bootable CD?
What ISO are you trying to make a bootable CD from?
If you insert this ISO file into a VM’s virtual optical disk drive, does the VM boot the ISO as expected?
Is a bootable USB not an option?
Do you need to use a GUI program for this, or are you able to try xorriso?
It is many years since the Ubuntu ISO image was small enough to fit on a CD-ROM. Even a DVD-ROM would be too small unless it was a single-side, dual-layer (SS/DL) disc. They are said to hold approximately 8.5 GB. I have a Ubuntu 24.04 LTS ISO image that is 6.2 GB in size and a Ubuntu 25.10 ISO image that is 5.7 GB in size.
Please confirm that the DVD-ROM disc that you are using is large enough to hold the particular Ubuntu ISO image that you wish to burn to the DVD-ROM. I ask this because you say that you have attempted to burn ISO files to CDs as well as DVDs.
Official documentation recommends a flash drive with 12 GB or larger.
The iso file in question is Clonezilla Live. It is used for backing up, restoring and cloning hard drives and it is small enough to fit on a CD. However, the same problem exists when attempting to make a bootable DVD to load Ubuntu.
I never had problems making bootable CDs with any Ubuntu 22.04 and earlier versions. This is a new problem unique to 24.04.
Since your k3b is a snap it’s probably a missing slot / plug connection. Might be ‘udisks2’ or ‘optical-drive’ or ‘scsi-generic’ to which k3b needs access. Run k3b from the command line to get more relevant error messages then look at ‘snap connections k3b’ and at the manual page for snap. From memory I think its probably something along the lines of snap connect k3b:udisks2 :udisks2 .
Have you tried burning it to disk as a superuser?.. i mean the clonezilla live iso file your trying to burn… asking because the only error your getting is linked to permissions which can be bypassed as a superuser…
I used to burn CD/DVD and created many coasters (bad burns) and versions changed so often that I had stacks of CD/DVDs. So converted to using flash drives.
And then used grub2’s loopmount to directly boot ISO on flash drive. Bit complicated to get path & ISO name correct or updated with grub.
Now many use Ventoy which is easier for a newer user to create. And once a Ventoy flash drive is created, all you have to do is copy an ISO into its partition.
I downloaded Ventory, extracted it into a folder, changed to folder & ran its install script to a flash that that was sdb:
fred@z170-noble:~/ISO/ventoy-1.1.07$ sudo bash Ventoy2Disk.sh -i -g /dev/sdb
After performing all the updates, I ran Brasero as root. This did not solve the problem.
I then used Brasero to copy the iso file to a CD (as a data file - not a bootable disc) which it did successfully. So the burner is working fine.
I tried using wodim with the command: sudo wodim -v -tao -eject dev=/dev/sr0 speed=8 /home/$USER/Downloads/clonezilla-3.2.2-15.iso
This successfully created a UEFI bootable CD with Clonezilla.
So there must be something in between the GUI applications (Brasero, K3B and Burner) and wodim (the burner software) that can’t open the iso file and pass the contents to wodim to burn to the CD. (same is true for DVDs). Whatever the problem is, it’s new to 24.04 as it never happened with earlier versions.