[CentOS] Disable hybernate/suspend in CentOS 7

Thu Oct 13 21:10:15 UTC 2016
Valeri Galtsev <galtsev at kicp.uchicago.edu>

On Thu, October 13, 2016 11:55 am, Mike - st257 wrote:
> On Thu, Oct 13, 2016 at 11:33 AM, Valeri Galtsev
> <galtsev at kicp.uchicago.edu>
> wrote:
>
>> Dear Experts,
>>
>> Could someone point me in the right direction: how can I disable
>> hybernate/suspend in CentOS 7?
>>
>> I get workstations for graduate students with decent amount of RAM (32
>> GB), and for machines with large RAM I either do not have swap at all of
>> have some small (4 GB) swap. As I remember from older manuals, one has
>> to
>> have at least twice amount of swap compared to physical RAM for
>> hybernate/suspend to work. This probably is what bit me: new Dells came
>> with keyboard that has sleep button, when one hits that button the
>> machine
>> locks up. (it stays powered on, does not respond mouse, keyboard, does
>> not
>> respond ping).
>>
>> I would like to disable that sleep button on keyboard. (I'm kind of
>> trying
>> to avoid replacing keyboard with the ones that do not have "sleep" key).
>>
>
> Have you tried disabling power management via GRUB options?
> http://askubuntu.com/a/130541
>

Mike, thanks! You gave me good enough push into right direction, thanks to
which I solved my problem.

Disabling power management via GRUB (boot) options didn't help me. I went
further along these lines, tried to tweak related stuff in
/etc/systemd/login.conf (systemd experts will probably lough, I'm not one,
so... ;-) - didn't help either. I finally came to doing what helped me:
edited

/usr/share/polkit-1/actions/org.freedesktop.login1.policy

(replaced "yes" with "no" in a few related places). This solved my
problem. I'm not posting what exactly I changed, as I overdid it (disabled
locally logged in user's ability to reboot/poweroff machine, and the same
from gdm loging screen - I will need to restore these).

Thanks!
Valeri

>
>>
>> Thanks a lot for all your help!
>>
>> Valeri
>>
>> ++++++++++++++++++++++++++++++++++++++++
>> Valeri Galtsev
>> Sr System Administrator
>> Department of Astronomy and Astrophysics
>> Kavli Institute for Cosmological Physics
>> University of Chicago
>> Phone: 773-702-4247
>> ++++++++++++++++++++++++++++++++++++++++
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> https://lists.centos.org/mailman/listinfo/centos
>>
>
>
>
> --
> ---~~.~~---
> Mike
> //  SilverTip257  //
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>


++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
++++++++++++++++++++++++++++++++++++++++