[SOLVED] Plasma 5 K3b cdrecord user permissions issue

RadicalDreamer · 06-18-2018, 01:10 AM

I haven't burned anything for a couple of months. I can only burn stuff as root right now. I ran into this issue prior to the latest Plasma 5 update. I haven't changed anything in my setup. Here are screenshots of the k3b error, debug output, and user permissions:

RadicalDreamer · 06-18-2018, 01:42 AM

Also the change permissions button doesn't work.

wael_h · 06-18-2018, 02:36 AM

Hi RadicalDreamer;

Look in /usr/doc/k3b-18.04.2/PERMISSIONS.txt file. Note you many need to replace version number!

I am trying to remember what I did ... can not!

I wish I could be more helpful.

Wali

wael_h · 06-18-2018, 03:15 AM

Dear RadicalDreamer;

I think this was what I did as root:

1) change owner and group as follows:

Quote:

root@lazyant:~# chown root:cdrom /usr/bin/cdrdao
root@lazyant:~# chown root:cdrom /usr/bin/cdrecord
root@lazyant:~# chown root:cdrom /dev/sr0

2) change permission as follows:

Quote:

root@lazyant:~# chmod 4711 /usr/bin/cdrdao
root@lazyant:~# chmod 4711 /usr/bin/cdrecord
root@lazyant:~# chmod 666 /dev/sr0

Please note /dev/sr0 is my dvd drive device -- I think yours is the same, you may have 2 drives!

Hope I am right.

Wali

orbea · 06-18-2018, 08:53 AM

I think you just need something like this.

Code:

# chown root:somegroup /usr/bin/cdrecord
# chmod 4710 /usr/bin/cdrecord

chrisretusn · 06-18-2018, 10:04 AM

Similar thing happen to me a few days ago. This is what I did based on what was shown in K3b's setup, permissions.

Code:

chown root:cdrom /usr/bin/cdrdao
chown root:cdrom /usr/bin/cdrecord
chown root:cdrom /usr/bin/growisofs

chmod 4710 /usr/bin/cdrdao
chmod 4710 /usr/bin/cdrecord
chmod 750 /usr/bin/growisofs

RadicalDreamer · 06-18-2018, 10:16 AM

Thank you all for the responses! I got it working! I was afraid of touching something that policykit or something else is supposed to modify. Sadly policykit works when a malware ad tries to get root access :/

Now if it would correctly burn 5 gb files onto a bd-r. Not quite sure what is wrong there. It successfully burns coasters with the "Fatal error during recording: Input/output error." Some actually get through the verification process?! I should probably use windows for larger files.

phd21 · 10-21-2018, 03:24 PM

Hi Everyone,

I never had any issues with K3b in Linux Mint 18.x based on Ubuntu 16.04 or earlier versions, but I have with Linux Mint 19.x based on Ubuntu 18.04 and the various KDE desktops using Ubuntu 18.04+ because of permission issues and adding the user to the cdrom group which is how I stumbled upon this post.

To record more than the 4.7gb / 8.5gb DVD sizes like for Blu-Ray discs (25gb, 50gb, 100gb), see link below.

Burn Blu-ray Disks in Ubuntu, Linux Using K3b - has information on installing a PPA for newer version of "cdrecord" for handling "Blu-Ray" discs.
https://www.debugpoint.com/2018/08/b...ntu-linux-k3b/

https://www.debugpoint.com/2018/08/b...ntu-linux-k3b/

Hope this helps ...

bassmadrigal · 10-21-2018, 04:15 PM

Quote:

Originally Posted by phd21

Burn Blu-ray Disks in Ubuntu, Linux Using K3b - has information on installing a PPA for newer version of "cdrecord" for handling "Blu-Ray" discs.
https://www.debugpoint.com/2018/08/b...ntu-linux-k3b/

https://www.debugpoint.com/2018/08/b...ntu-linux-k3b/

Hope this helps ...

This doesn't help Slackware users since we don't use PPAs or deb packages. To solve the issue on Slackware, you just need to adjust permissions to the right files and add your user to the right group, as specified in the CHANGES_AND_HINTS.TXT file on your favorite Slackware mirror.

phd21 · 10-21-2018, 04:40 PM

Hi bassmadrigal,

I am not familiar with Slackware, but the web link I referenced was more for people using Blu-Ray player burners (writers) to use K3b to burn the larger Blu-Ray discs greater than the typical DVD discs of 4.7gb or 8.5 dual-layer discs.

From what I just read, Debian users and perhaps Slackware users can still use the packages from PPA's and or deb files, see link below.

Install Packages From An Ubuntu PPA On Debian Linux - LinuxConfig.org
https://linuxconfig.org/install-pack...n-debian-linux

And by installing the "Alien" package, people using Linux systems using the ".rpm" files versus ".deb" files can easily convert ".deb" file(s) into ".rpm" files.

Hope this helps ...

Alien Bob · 10-21-2018, 05:31 PM

Quote:

Originally Posted by phd21

Hope this helps ...

Not at all unfortunately. Nothing of what you said applies to Slackware.

bassmadrigal · 10-21-2018, 05:40 PM

Quote:

Originally Posted by phd21

And by installing the "Alien" package, people using Linux systems using the ".rpm" files versus ".deb" files can easily convert ".deb" file(s) into ".rpm" files.

Slackware doesn't use RPMs or DEBs. It has its own packaging system that uses compressed tarballs. While there exists tools that can convert DEBs and RPMs to Slackware packages, they typically aren't recommended.

But the issue you mention does not seem to be the same one here as Slackware already includes k3b and cdrecord and is capable of burning multi-layered bluray/dvd discs as is. The issue above stems from a permissions issue because Slackware does not grant regular users the ability to burn discs. If that is desired, it requires the administrator to allow it by setting certain permissions to cdrecord and cdrdao and adding the desired users to the correct group.