[Bug 426592] New: clocksource 'acpi_pm' looses time.
https://bugzilla.novell.com/show_bug.cgi?id=426592 Summary: clocksource 'acpi_pm' looses time. Product: openSUSE 11.0 Version: Final Platform: i586 OS/Version: Other Status: NEW Severity: Major Priority: P5 - None Component: Kernel AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: robin.listas@telefonica.net QAContact: qa@suse.de Found By: --- My 11.0 system by default uses the 'acpi_pm' clocksource, and this one is bad. It can run OK for hours. Then, I leave the PC alone for some hours, come back, and the computer clock is off by 6 minutes from the wall clock time! Yes, the ntp daemon was running but it couldn't cope. In fact, it did not even complain: 13 Sep 21:16:51 ntpd[21753]: offset 0.007487 sec freq 14.405 ppm error 0.000662 poll 10 13 Sep 22:16:51 ntpd[21753]: offset 0.006803 sec freq 14.409 ppm error 0.000539 poll 10 13 Sep 23:12:36 ntpd[21753]: synchronized to 130.206.130.95, stratum 2 13 Sep 23:13:28 ntpd[21753]: synchronized to 212.101.3.211, stratum 2 13 Sep 23:14:30 ntpd[21753]: synchronized to 130.206.130.95, stratum 2 13 Sep 23:15:08 ntpd[21753]: synchronized to LOCAL(0), stratum 10 13 Sep 23:16:51 ntpd[21753]: offset 0.000000 sec freq 14.415 ppm error 0.000001 poll 10 13 Sep 23:30:10 ntpd[21753]: synchronized to 134.34.3.19, stratum 1 13 Sep 23:37:48 ntpd[21753]: ntpd exiting on signal 15 I restarted the daemon, it doesn't log the time error. 13 Sep 23:37:50 ntpd[12066]: system event 'event_restart' (0x01) status 'sync_alarm, sync_unspec, 1 event, event_unspec' (0xc010) 13 Sep 23:37:50 ntpd[12066]: peer LOCAL(0) event 'event_reach' (0x84) status 'unreach, conf, 1 event, event_reach' (0x8014) 13 Sep 23:37:50 ntpd[12066]: can't open /var/log/ntpstat/peerstats.20080913: Permission denied I get many of those permissions denied, I have to check the config file yet. That's not related to the current problem 13 Sep 23:37:59 ntpd[12066]: synchronized to 80.38.21.80, stratum 3 13 Sep 23:43:51 ntpd[12066]: time reset +351.529639 s Solution (hack)? In "/etc/init.d/boot.local" I force to another clocksource: echo tsc > /sys/devices/system/clocksource/clocksource0/current_clocksource This one remains stable. This problem started with opensuse 10.3 (reported Bug 350981). 10.2 was correct. See there for the entire report (sp. where it is demonstrated it is software, not hardware error, 10.2 works fine). Ask for further tests or logs if necessary. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=426592
Andreas Jaeger
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User gregkh@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=426592#c1
Greg Kroah-Hartman
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User robin.listas@telefonica.net added comment
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Carlos Robinson
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User gregkh@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=426592#c3
Greg Kroah-Hartman
https://bugzilla.novell.com/show_bug.cgi?id=426592
User robin.listas@telefonica.net added comment
https://bugzilla.novell.com/show_bug.cgi?id=426592#c4
--- Comment #4 from Carlos Robinson
https://bugzilla.novell.com/show_bug.cgi?id=426592
User robin.listas@telefonica.net added comment
https://bugzilla.novell.com/show_bug.cgi?id=426592#c5
--- Comment #5 from Carlos Robinson
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