I have this same problem on Ubuntu 19.10 on ThinkPad X1 Carbon 7th gen.
sudo rtcwake -u -s 60 -m mem
rtcwake: /dev/rtc0: unable to find device: No such file or directory
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** Tags added: cscc
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https://bugs.launchpad.net/bugs/1743027
Title:
error loading realtime clock since upgrading to 17.10
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Within the 4 computer I have running Ubuntu, only one, my Toshiba
Satellite Laptop with the current 4.15 Kernels available from the Ubuntu
16.04.5 and 18.04.1 Repositories fails to create the /dev/rtc device...
NOTE: The 3 other Ubuntu Machine are not effected by this
CONFIG_WDAT_WDT Bug...
This also affects my system in Ubuntu 18.04 LTS - very annoying!
Apparently, according to the upstream bug report, a proper fix is
included in Linux 4.18
(https://bugzilla.kernel.org/show_bug.cgi?id=199033#c91) - can we expect
a backport for Ubuntu LTS?
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Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: Sony Corporation
Product Name: SVS13A3W9ES
Version: C60BRBTW
Serial Number: 54528306-358
UUID: E6F5C740-64C8-11E2-A592-3C0771848C83
Wake-up Type: Power Switch
SKU
A bug has been filed with the kernel developers here:
https://bugzilla.kernel.org/show_bug.cgi?id=199033
Also, I have confirmed that disabling CONFIG_WDAT_WDT and re-compiling
the kernel, as Alexandre suggested, does allow the RTC to run properly.
** Bug watch added: Linux Kernel Bug Tracker
The issue is caused by CONFIG_WDAT_WDT which driver is stealing the RTC
resources before the RTC driver is probed. Disabling CONFIG_WDAT_WDT
will solve that issue.
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Can you do a kernel bisection?
First, find the last good -rc kernel and the first bad -rc kernel from
http://kernel.ubuntu.com/~kernel-ppa/mainline/
Then,
$ sudo apt build-dep linux
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd linux
$ git bisect start
$ git
Just tested again, and the problem still exists in kernel
4.16.0-041600rc1-generic. I'll be sending that update to the kernel
maintainers as well.
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Still no response from the kernel team. After a week, I tested the
newest daily build of the kernel, and the problem still exists. Sent a
follow-up email with that info, and haven't heard anything.
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Here is the link to the email sent to the maintainers list:
https://marc.info/?l=linux-rtc=151683917607842=2
** Tags added: kernel-bug-reported-upstream
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I've followed the instructions in the Wiki page and sent the email to
the maintainers. I will update when I hear back from them.
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https://bugs.launchpad.net/bugs/1743027
Title:
error
This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report[0]? That will allow the upstream Developers to examine the issue,
and may provide a quicker resolution to the bug.
Please follow the instructions on
Hi Joseph,
As requested, I booted and tested the 4.15.0-041500rc9-generic kernel,
and the problem still exists. Let me know if you have any other
questions.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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You received this bug
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.15 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
apport information
** Tags added: apport-collected artful wayland-session
** Description changed:
(originally asked over at askubuntu.com, but is still unresolved:
https://askubuntu.com/questions/971349/problem-with-real-time-clock-
since-upgrading-to-ubuntu-17-10)
I recently
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