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Old 10-30-2014, 08:57 PM   #1
mreff555
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power saving. Laptop-mode not working


I keep my laptop plugged in because I don't trust laptop mode. It has worked in the past but I haven't tested it in a while. This morning my laptop got unplugged and it crashed b/c it wasn't in a sleep/hibernate state.

These used to work. Now they don't
PHP Code:
dan@mojo ~ $ sudo echo mem > /sys/power/state 
bash
: /sys/power/statePermission denied
dan
@mojo ~ $ sudo echo mem >> /sys/power/state 
bash
: /sys/power/statePermission denied 
If I actually su to root first, then it works.
I'm not sure what changed but the change in manual functionality seems to be coupled with the issues with laptop-mode.
Any suggestions?
 
Old 10-30-2014, 10:22 PM   #2
ember1205
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Sounds like you need to edit /etc/sudoers to ensure that you have the permission to execute those commands with sudo.
 
Old 11-02-2014, 01:10 PM   #3
mreff555
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I've posted my /etc/sudoers file,
Based on this configuration I would think that anyone with the wheel flag should have sufficient access


https://bpaste.net/show/13ed7b723697

Code:
dan@mojo ~ $ groups dan
wheel audio video portage games dropbox dan
 
Old 11-02-2014, 02:12 PM   #4
ember1205
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Read the comments in the file you posted. The section AFTER where you uncommented discusses allowing users to execute a command without a password. The section you opened up will allow users to execute the commands, but they will need to enter a password.
 
Old 11-02-2014, 03:17 PM   #5
mreff555
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Right. I saw that, and admittedly never tried that but it seems insecure. I am used to entering my password after running Sudo.
Also, I don't see how that would make a difference since ultimately the permissions are the same.
 
Old 11-02-2014, 03:32 PM   #6
ember1205
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If you grant explicit permission to one command, for one user, without the use of a password, this can be helpful for things like cron jobs. You need to understand what the user could potentially do with that one command and decide if it's an appropriate level of security for your system. Granting wide open access to to groups of users to do whatever they want without a password as a major security hole.
 
Old 11-02-2014, 05:16 PM   #7
mreff555
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Ok. Thanks. I'll see if I can find a Sudo tutorial and figure out how to do that for the echo command.
 
Old 11-02-2014, 08:33 PM   #8
ember1205
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man sudoers
 
  


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