Ubuntu
acpi-support package

laptop goes back to summer time after suspend/resume

Bug #158358 reported by Steinar Bang
2
Affects Status Importance Assigned to Milestone
acpi-support (Ubuntu)
Fix Released
Low
Unassigned

Bug Description

The laptop is in the CET/MET time zone. On the night from October 27 to October 28, it switched over to winter time the way it was supposed to. However when I suspended and resumed the laptop on October 28, it reverted to winter time. The clock is on automated synchronization, and after a while it synchronizes with the network and displays the right time.

Trying to make it manually synchronize with NTP servers does _not_ set the correct time (a difference between ntpd and ntp-date, I guess...).

Some version information:
 Intel Pentium M,
 Ubuntu 7.10,
 linux-image-2.6.22-14-generic 2.6.22-14.46

~$ cat /etc/timezone
Europe/Oslo
~$ sudo zdump -v /etc/localtime | grep 2007
/etc/localtime Sun Mar 25 00:59:59 2007 UTC = Sun Mar 25 01:59:59 2007 CET isdst=0 gmtoff=3600
/etc/localtime Sun Mar 25 01:00:00 2007 UTC = Sun Mar 25 03:00:00 2007 CEST isdst=1 gmtoff=7200
/etc/localtime Sun Oct 28 00:59:59 2007 UTC = Sun Oct 28 02:59:59 2007 CEST isdst=1 gmtoff=7200
/etc/localtime Sun Oct 28 01:00:00 2007 UTC = Sun Oct 28 02:00:00 2007 CET isdst=0 gmtoff=3600

Related branches

lp:ubuntu/lucid/acpi-support
Revision history for this message
Scott James Remnant (Canonical) (canonical-scott) wrote :

Committed changes to stop synchronising the system and hardware clocks over a suspend/resume cycle, which will be released with acpi-support 0.120 in jaunty.

The rationale is that the kernel records the delta between the two clocks on suspend, and resets the system clock on resume based on this delta. The mix of the two can lead to strange issues such as you've seen.

We now just let the kernel do its thing.

Changed in acpi-support:
status: New → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package acpi-support - 0.120

---------------
acpi-support (0.120) jaunty; urgency=low

  [ Alexander Solodukhin ]
  * Correct suspend.d/55-down-interfaces.sh to point to
    /var/run/network/ifstate rather than /etc/network/run/ifstate.
    LP: #295544.

  [ Martin Pitt ]
  * Drop lib/*.config: I committed all sleep quirks to hal-info now
    (upstream, and in Jaunty). The ACPI_SLEEP whitelisting, as well as
    acpi-support's suspend/resume handling itself is not used by
    default any more, and almost all laptops support suspend/resume
    nowadays, so keeping a whitelist is the wrong approach.
    LP: #37303, #44781.
  * lib/device-funcs: Drop reading of .config files.
  * Drop vbesave, resume.d/17-video-restore.sh, suspend.d/
    80-video-pci-state.sh, suspend.d/80-video-vesa-state.sh:
    pm-utils and hal-info handle VBE/PCI status quirks.

  [ Scott James Remnant ]
  * suspend.d/88-time.sh, resume.d/50-time.sh: Remove since the kernel
    keeps the system clock in sync with the hardware clock over a
    suspend/resume cycle. LP: #312486, #218120, #158358, #157936.
  * debian/preinst: Remove on upgrade.
  * Remove the toshiba_acpi.modprobe file; this sets a kernel option that's
    been the default for ages.

 -- Scott James Remnant <email address hidden> Tue, 03 Mar 2009 17:29:01 +0000

Changed in acpi-support:
status: Fix Committed → Fix Released
To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.