diff options
| author | Victor Lowther <victor.lowther@gmail.com> | 2008-11-28 16:15:15 -0600 |
|---|---|---|
| committer | Victor Lowther <victor.lowther@gmail.com> | 2008-11-30 18:21:02 -0600 |
| commit | 493224b1beeac0154807bcb1ac8a3007a46c435b (patch) | |
| tree | f62b71e81c96e60278a92e46fb4a682ac324ab80 | |
| parent | 6eb53f4de576e9a569d9019f3398c23438c2cfa5 (diff) | |
90clock takes over a second to run on suspend.
Most systems do not need it. Add NEED_CLOCK_SYNC, and only run hwclock
if it is set. This will probably go away entirely in a later release.
| -rw-r--r-- | README.debugging | 6 | ||||
| -rw-r--r-- | man/pm-action.xml | 13 | ||||
| -rw-r--r-- | pm/defaults | 3 | ||||
| -rwxr-xr-x | pm/sleep.d/90clock | 2 |
4 files changed, 24 insertions, 0 deletions
diff --git a/README.debugging b/README.debugging index 76be415..47c756a 100644 --- a/README.debugging +++ b/README.debugging @@ -21,6 +21,12 @@ End-user customization and debugging: environment variable to have that module removed when the system suspends and reloaded when the system wakes up. +* If your clock drifts across a sleep/wake cycle, you can use + NEED_CLOCK_SYNC="true" to force pm-utils to synchronize clocks. + This is a change in the default behaviour of pm-utils -- 1.2.2.1 and earlier + always synchronized clocks, but doing so is slow and most hardware stays in + sync without assistance. + * To find out what parameters can be passed to pm-suspend and friends, run them with '--help' as the first parameter as root. This will print out the options that it supports and which hooks or modules handle those options. diff --git a/man/pm-action.xml b/man/pm-action.xml index 964676f..a6e064c 100644 --- a/man/pm-action.xml +++ b/man/pm-action.xml @@ -486,7 +486,20 @@ will be surrounded by [square brackets]. </para> </listitem> + </varlistentry> + <varlistentry> + <term><envar>NEED_CLOCK_SYNC</envar></term> + <listitem> + <para> + If your system clock drifts across a suspend/resume or + hiberante/thaw cycle, you should set this to true. + This will cause pm-utils to synchronize the system clock + whenever we go through a sleep/wake cycle at the expense of + making suspend/resume take longer. + </para> + </listitem> </varlistentry> + </variablelist> </refsect1> diff --git a/pm/defaults b/pm/defaults index c0063c5..db4d59a 100644 --- a/pm/defaults +++ b/pm/defaults @@ -47,3 +47,6 @@ # If you want to ignore commandline parameters, add them here. # DROP_PARAMETERS="" +# If you need to synchronize the system clock across a suspend/resume or +# hibernate/thaw cycle, set this variable. +# NEED_CLOCK_SYNC="true" diff --git a/pm/sleep.d/90clock b/pm/sleep.d/90clock index d824778..5df6e8e 100755 --- a/pm/sleep.d/90clock +++ b/pm/sleep.d/90clock @@ -15,6 +15,8 @@ resume_clock() /sbin/hwclock --hctosys >/dev/null 2>&1 0<&1 } +[ "$NEED_CLOCK_SYNC" ] || exit $NA + case "$1" in hibernate|suspend) suspend_clock ;; thaw|resume) resume_clock ;; |