hwclock test failed on Power8 / Power9 system with Bionic kernel

Bug #1775858 reported by Po-Hsu Lin on 2018-06-08
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

$ /sbin/hwclock --debug --set --date "2004/10/20 04:10:00"
hwclock from util-linux 2.31.1
System Time: 1528467313.266333
Trying to open: /dev/rtc0
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-22-generic 4.15.0-22.24
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic ppc64le
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: ppc64el
Date: Fri Jun 8 14:05:13 2018
 PATH=(custom, no user)
ProcLoadAvg: 0.04 0.67 0.79 1/1401 6691
 Filename Type Size Used Priority
 /swap.img file 8388544 0 -2
ProcVersion: Linux version 4.15.0-22-generic (buildd@bos02-ppc64el-009) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #24-Ubuntu SMP Wed May 16 12:12:37 UTC 2018
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDump_list: total 0
cpu_cores: Number of cores present = 40
cpu_coreson: Number of cores online = 40
cpu_dscr: DSCR is 0
 min: 2.796 GHz (cpu 79)
 max: 2.850 GHz (cpu 81)
 avg: 2.823 GHz
 Could not retrieve current diagnostics mode,
 No kernel interface to firmware
cpu_smt: SMT=4

Po-Hsu Lin (cypressyew) wrote :
Po-Hsu Lin (cypressyew) on 2018-06-08
affects: linux-signed (Ubuntu) → linux (Ubuntu)

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1775858

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete

In this cycle the test failed with time difference:

TestFail: Failed to set hwclock back to Warthog's birthday. Output of hwclock is '2004-10-20 04:09:59.590277+0000'

Po-Hsu Lin (cypressyew) wrote :

This issue in comment #3 can be found on P8 system as well (modoc, passed on entei)

summary: - hwclock test failed on Power9 system with Bionic kernel
+ hwclock test failed on Power8 / Power9 system with Bionic kernel
Po-Hsu Lin (cypressyew) wrote :

Need to check this for the next cycle, or it's been replaced by 1802233

Changed in ubuntu-kernel-tests:
status: New → Incomplete
Po-Hsu Lin (cypressyew) wrote :

Bug replaced by 1802233,

closing this.

Changed in ubuntu-kernel-tests:
status: Incomplete → Invalid
Changed in linux (Ubuntu):
status: Incomplete → Invalid
Po-Hsu Lin (cypressyew) on 2019-05-10
no longer affects: linux (Ubuntu Bionic)
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