Hi all and thanks for reading,
I have a messy problem of permissions of /dev/nvidiactl and /dev/nvidia0.
As usual on debian distributions the video devices are owned by the video group.
ls -l /dev/nvidia*
crw-rw---- 1 root video 195, 0 Sep 27 17:56 /dev/nvidia0
crw-rw---- 1 root video 195, 255 Sep 27 17:56 /dev/nvidiactl
The problem is that I have a cluster with 1600 users and we use an ldap server
for autentication where groups are not implemented (unfortunately i have no
access to the LDAP server);
so all the users belong to the group users and I can't add all of them to the
video group so users cannot open the nvidia* devices.
to solve the problem i tried to edit the init.d/nvidia-kernel script and
replaced the line
mknod -m 0660 dev/nvidiactl c 195 255
with
mknod -m 0666 dev/nvidiactl c 195 256
and editing /etc/modprobe.d/nvidia-kernel-nkc.conf as suggested here:
http://forums.nvidia.com/index.php?showtopic=82687
After the system boot permissions ore ok, but they are changed to default
values after starting X or every application which tries to access these
devices ;
I've also edited /etc/udev/rules.d/061_nvidia.rules (wich is a symlink to
/etc/udev/nvidia.rules) adding the line
SUBSYSTEM=="nvidia*", GROUP="users" , MODE="0666"
and even
KERNEL=="nvidia*", NAME="%k" , GROUP="users" ,
MODE="0666"
but this doesn't solve the problem.
I've found nothing about video devices looking into consolekit or policykit
conf files.
Do you know which program is responsible for the automatic changes of devices
permissions?
Best regards
--
Giorgio Ruffa
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