K3b permissions issues.

Gabriel Dragffy dragffy at yandex.ru
Tue May 9 15:28:56 UTC 2006


In the shop I wrote a CD, when I came home I wrote a dual layer DVD, and for 
some days after I was busy writing various media.

Then one time I tried to burn a CD (actually the Dapper Beta 2 image) and 
couldn't. I found if I invoked K3b as root it was OK. But this problem 
definitely occurred with both DVD and CD writing. It's something that just 
seemed to creep in after some time.... and I cannot think of anything in 
particular that could have invoked it.

K3b setup tool should in theory set the correct permissions for the device but 
for some reason it lists it as being on sg1 whereas the actual cdrecord 
program thinks the writer on sg0, hence the problem with permissions.

If I look under /dev/ sg1 does indeed have the cdrom group, but sg0 remains as 
group root, which is not very helpful.

The thing that really gets me is why it worked perfectly and then broke after 
some time. What really gets me is that I have 2 images of my computer as 
backups. These were taken sometime before I ever got the new writer, I tried 
both of these backups and both were the same with having incorrect 
permissions. That means that it couldn't have been any update causing this 
problem.

The only thing I can think of is that in the shop I connected the drive 
directly to a USB port on the laptop, and I since changed it so it was 
connected to a USB 4-way hub and this caused the device node to change. 
However if I connect it directly to its own USB port it still retains the odd 
permissions....

On Tuesday 09 May 2006 22:59, Derek Broughton wrote:
> iirc, this is a DVD writing problem - it doesn't happen with CDs (though
> it's a long time since I fixed the /dev/sg0 permissions on my own machine,
> so I might be misremembering).  Are you sure you could write both?  Or was
> it only CDs?
> --
> derek




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