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Old 03-16-2014, 07:07 AM   #1
SolusUmbra
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BIOS clock


I didn't know if this needed to go under hardware or software so I put it in this forum. I have noticed that ever since I installed Linux Lite that my BIOS clock keeps changing. I have looked around online and found that if the date and time where wrong it might be the battery. But my problem is just the time, most of the time it is just the hour. I knew to go look at the BIOS time because I have my computer set up to turn on at a certain time every morning, and wasn't all that happy when it turns on at the wrong time. I have read that it might be a program messing with the BIOS time, or some kind of time zone problem?
 
Old 03-16-2014, 08:56 AM   #2
Ser Olmy
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This could be related to a kernel setting that sets the hardware clock whenever an NTP synchronization takes place. It will result in your BIOS clock being set to UTC. Does that match what you're seeing?
 
Old 03-16-2014, 09:03 AM   #3
SolusUmbra
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I'm pretty new to Linux so i don't know much about the kennel, however I do have noticed that the time clock on the OS (desktop) does stay correct when the BIOS one changes.
 
Old 03-16-2014, 09:12 AM   #4
Ser Olmy
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How much off is the BIOS clock? Does it match the difference between UTC and your local time zone?
 
Old 03-16-2014, 09:20 AM   #5
SolusUmbra
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My best guess is that it is around 4 hours off so yes I think it matches the different.
 
Old 03-16-2014, 09:26 AM   #6
Ser Olmy
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Sounds like the BIOS real-time clock is being set by the kernel. That kernel function doesn't support local time zones, and will always use UTC.

If your distribution contains the file /proc/config.gz (which is a virtual file containing the kernel configuration), the following command should return the relevant settings:
Code:
zcat /proc/config.gz | grep "_RTC.*HC"
Run that command in a terminal window and post the results.

Which distribution are you using?
 
Old 03-16-2014, 09:37 AM   #7
SolusUmbra
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Distrabution is Linux Lite

Termainal Window
gzip: /proc/config.gz: No such file or directory
 
Old 03-16-2014, 09:47 AM   #8
Ser Olmy
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OK, yet another distribution using a kernel configured not to give out its parameters.

The Linux Lite website is very slick, but basically devoid of any in-depth technical information. I searched through their forums for information about the kernel configuration, but came up empty.

If the kernel is indeed configured to update the BIOS clock (the configuration parameter in question is called CONFIG_RTC_SYSTOHC), there's not much you can do about it short of replacing the kernel.

I suggest you register on the Linux Lite forums and post a question there.
 
Old 03-16-2014, 09:54 AM   #9
SolusUmbra
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Alright thanks for all your help.
 
  


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