[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1865129
Title:
/dev/rtc missing despite having configs for RTC in kernel
Status in linux package in Ubuntu:
Expired
Bug description:
At bootup following error is seen:
[ 12.041110] rtc_cmos 00:02: RTC can wake from S4
[ 12.098168] rtc_cmos: probe of 00:02 failed with error -16
iotadmin@localhost:~$ cat /proc/version*
Linux version 4.15.18+ ([email protected]) (gcc version 7.4.0 (Ubuntu
7.4.0-1ubuntu1~18.04.1)) #1 SMP Thu Feb 27 21:58:50 PST 2020
I have following configs in my kernel.
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_SYSTOHC=y
CONFIG_RTC_NVMEM=y
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_I2C_AND_SPI=y
CONFIG_RTC_DRV_CMOS=y
iotadmin@localhost:~$ ls -l /dev/ | grep rtc
iotadmin@localhost:~$
iotadmin@localhost:~$ timedatectl
Local time: Fri 2020-02-28 09:58:20 UTC
Universal time: Fri 2020-02-28 09:58:20 UTC
RTC time: n/a
Time zone: n/a (UTC, +0000)
System clock synchronized: yes
systemd-timesyncd.service active: no
RTC in local TZ: no
iotadmin@localhost:~$ hwclock --debug
hwclock from util-linux 2.31.1
System Time: 1582883907.124128
Trying to open: /dev/rtc0
Trying to open: /dev/rtc
Trying to open: /dev/misc/rtc
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.
iotadmin@localhost:~$
iotadmin@localhost:~$ uname -a
Linux localhost 4.15.18+ #1 SMP Thu Feb 27 21:58:50 PST 2020 x86_64 x86_64
x86_64 GNU/Linux
iotadmin@localhost:~$
iotadmin@localhost:~$ cat /proc/devices
Character devices:
1 mem
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
5 ttyprintk
7 vcs
10 misc
13 input
21 sg
89 i2c
128 ptm
136 pts
180 usb
189 usb_device
204 ttyMAX
242 ptp
243 pps
244 rpmb
245 ttyDBC
246 bsg
247 hmm_device
248 watchdog
249 rtc
250 dax
251 dimmctl
252 ndctl
253 tpm
254 gpiochip
Block devices:
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
259 blkext
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