RTC doesn't work on Ubuntu 18.04

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mbonamusa
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RTC doesn't work on Ubuntu 18.04

Post by mbonamusa »

I'm using an odroid-c1+ with the latest ubuntu 18.04.3 LTS image and RTC is not working
ontrace@ontracehdmi:~$ sudo hwclock -r
hwclock: select() to /dev/rtc0 to wait for clock tick timed out

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Re: RTC doesn't work on Ubuntu 18.04

Post by odroid »

RTC in the S805 SoC had a couple of serious problems and we couldn't recommend it for professional application.
Refer this thread.
viewtopic.php?f=117&t=29163&p=207806#p207806

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Re: RTC doesn't work on Ubuntu 18.04

Post by mbonamusa »

I've been using odroid c1+ with ubuntu 14.04 and RTC works well (Regardless of time draft)

Can I use any other RTC solution? C2 RTC_Shield is ready for C1?

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Re: RTC doesn't work on Ubuntu 18.04

Post by odroid »

We are building an Ubuntu 20.04 image for C1 series now.
We will check the internal RTC function on that within a few days.

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Re: RTC doesn't work on Ubuntu 18.04

Post by mbonamusa »

@odroid, do you check the RTC on ubuntu 20.04 image for C1?

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Re: RTC doesn't work on Ubuntu 18.04

Post by odroid »

I forgot this thread. Sorry.
We will try to test it.

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Re: RTC doesn't work on Ubuntu 18.04

Post by odroid »

Sorry for late reply.
It didn't work.

After applying this patch, the hwclock command worked on Ubuntu 20.04.
https://github.com/hardkernel/linux/com ... 4f663b3fdd

Update the kernel to 3.10.107-24 which merged the patch yesterday.

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