Questions tagged [rtc]

Real-time clock is a computer clock that keeps track of the current time.

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Error using rtcwake: unable to find device

I like to run rtcwake to wake up my machine automatically from suspend after some time using this command $ sudo rtcwake -u -s 60 -m mem But I get the following error: rtcwake: /dev/rtc0: unable to ...
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Daylightsavings changes send to RTC / BIOS

I'm using a Fujitsu D3417-B2 as headless homeserver with Ubuntu. Via Cron it is set to sleep every evening and via BIOS is wakes up every morning. Works really well until the clocks are set back or ...
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rtcwake does not wake up Ubuntu 18.04

sudo rtcwake -m off -s 180 does not work on my machine. It powers off, but does not wake up. My motherboard is ASUS M5A78L-M/USB3. Automatic wakeup was working on Ubuntu 14.04.
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Prevent clock from advancing to a system time after Ubuntu Server build time

I have an Ubuntu Server 18.04.1 LTS in a lab environment where I need to set the date a couple of years back in time (e.g. 2016-04-22). I can set the older date/time without any issues but the OS ...
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how to reboot Dell laptops nightly, even if they're asleep

We have a laptop cart with a bunch of Dell Latitude 5490's running Ubuntu Desktop 18.04. I'd like these to reboot nightly at 4 am. The cron job is simple enough, but it never runs because the laptops ...
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359 views

Shut down computer every night, and wake it up every morning

I have seen other topics about this, and have attempted it many times, but it fails for me. I have a desktop that I want to schedule to shut down at midnight, every night, and wake up at 6 am. I ran ...
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rtcwake: write error

I'm trying to send my system to sleep using e.g. rtcwake -v -m disk -s 60 and receive the following output rtcwake: RTC wird als UTC interpretiert UTC wird verwendet. delta = 1 tzone = ...
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Sleep & Wakeup Schedule | Ubuntu 16.04.3 LTS

I've been looking for solutions to have my computer go to sleep at 1am EST and wakeup at 6pm EST every day. Thus far I've been unsuccessful. I tried using rtcwake and cronjobs as well as the script ...
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How to tell Ubuntu that hardware clock is local time?

How to tell Ubuntu that hardware clock is local time? This command didn't help: timedatectl set-local-rtc 1
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RTCWake doesn't wake Ubuntu Server

Good Afternoon, I have switched from a Windows server to Ubuntu server and I have managed to replicate all the items I had on the old server with the exception of sleep mode. I currently have ...
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557 views

How to set up a RTC clock in Ubuntu Core?

I have a Raspberry Pi 3 that register data in time, so I need an RTC clock I've attached dtoverlay=i2c-rtc,ds3231 to config.txt. hwclock.service would be perfect, but it is masked, and I can't ...
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Can't connect to server through SSH after rtcwake reboot

I used crontab to create an rtcwake command to shut my computer down at midnight, and start it up at noon. The problem is, once it turns off, and then on again, I can't connect to the server through ...
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246 views

I/O Errors (filesystem readonly) after wake with rtcwake

I am trying to schedule the uptime of my server (it's in my bedroom) with rtcwake. The sleeping and waking gives no problems. But after waking the filesystem is set to readonly and I constantly get I/...
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817 views

XPCOM error 0x80004005 with RTC 4.0.6 on Ubuntu 14.04 64 bit

I had a problem when I start Rational Team Concert 4.0.6 which is installed on Rational Software Architect 9.1.2 (eclipse 4.2) on Ubuntu 14.04 64 bit. I also had the same problem as described by this ...
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860 views

Something is setting an rtc wakealarm. How do I stop it?

I am using Xubuntu 14.10 on a 3rd Gen Lenovo Carbon X1. A few days ago I noticed that my laptop was turning on by itself. I checked /proc/driver/rtc and saw that a wakealarm was set. So I did echo ...
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shut down linux server and turn on automatically at specific time

I'm having an assignment where the lecturer is asking me to create a bash script to shut down a server at 11pm and turn it on at 6am. I'm able to do it by using sudo shutdown -h 23:00 and it works. ...