On Thu, 27 Oct 2011 16:45:20 +0200 Martti Kühne <mysatyre@xxxxxxxxx> wrote: > On Thu, Oct 27, 2011 at 9:49 AM, Mick <bareman@xxxxxxxxxx> wrote: > > Following yet another update that has disabled user control of USB > > sticks, cameras, etc. and blocked user from shutting down from the > > desktop (in my case xfce4), I am at the end of my tether. > > hello > > Indeed recent updateds did fuck around with group memberships, I had > to add myself again to disk, camera and iirc video groups in > /etc/group. I could swear I was a member in those groups before. > There is no way to be forewarned about this stuff, Somebody, probably upstream, made a decision to code this behaviour into the updated package therefore they can and should be documenting it. > but if you could please find out which updates are causing this stuff, > we could inform the devs about it in a more precise fashion. If I manage to track it down I will be putting in bug reports. > The other fact is that recent udev changes modified many of the > group-based permissions, which you can only solve with manual > intervention. > > Solving these problems: USB sticks, cameras etc are basically > represented as device nodes in /dev, eg. /dev/usb respectively. You > can display those device nodes and their owner and group easily enough > by printing them with ls -l: > martti@deepthought:~$ ls -l /dev/sr0 > brw-rw---- 1 root disk 11, 0 Oct 27 05:33 /dev/sr0 > > so, I have to check if I'm a member in group disk: > martti@deepthought:~$ groups > disk lp wheel video audio optical camera power vboxusers wireshark > martti > > Oh, I am a member in that group and may access/mount that device. If I > happen not to be, I can add myself to groups like so: > # usermod -G <groups,comma,delimited> <user> > Just checked and I can't see any changes to what I set myself. [mick@cave ~]$ groups lp,wheel,log,locate,http,video,audio,optical,storage,scanner,camera,power,users,wireshark oops disk is missing, no, group disk exists and I am a member of it, its just the group command telling fibs. Sometimes this breakage is silently fixed at a subsequent update, otherwise I have stumbled on a fix by accident. mick
