Hello, I have an IBM ThinkPad T23 with highly inaccurate clock. It misses accurate time by several minutes a day.
Long time I used chrony. It worked most of the time, but not always. Right now the problems I have with chrony - see below - increased and none of the other approaches worked like I want. I want the following: 1) When the laptop has internet access it should synchronise with NTP time 2) Otherwise a program should correct the clock by its average inaccuracy (like chrony is supposed to do). That is be important cause sometimes the laptop is without internet access for several days. 3) Suspend to disk should be handled nicely. 4) Ideally on resume and boot the time is corrected due to NTP time or the inaccuracy factor via one big step. Right now I am fighting with chrony and different other approaches and none of them worked like I want it to. My problems with chrony: 1) I had chrony claiming that system time had 0 seconds difference to NTP time while there was a difference of 10 or more minutes. This is with a standard chrony installation (after aptitude purge chrony). 2) Chrony apparantly cannot set the hardware clock. I get a input/output error on modprobe rtc, and it seems that the module genrtc doesn't do the trick. I reverted on not letting chrony do that but the usually debian hwclock scripts which seems to work. 3) Sometimes net access is not detected properly. I have copied /etc/ppp/ip-up.d/chrony and /etc/ppp/ip-down.d/chrony to /etc/network/if-up.d and /etc/network/if-down.d respectively in order to have chrony switched online and offline accordingly. I am using ifplugd and guessnet for automatic network configuration on demand which is worked quite well. 4) After suspend to disk chrony does not seem to have any NTP sources at all... I tried different approaches, right now I am using: #!/bin/sh /etc/init.d/ifplugd stop ifdown eth0 /etc/init.d/chrony stop # Noch nicht gespeicherte Daten sichern sync # Einschlafen hibernate /etc/init.d/chrony start /etc/init.d/ifplugd start Rationale for this: chrony and network are stopped before suspend since they do not work anyway while the notebook is powered off. After resume chrony is started and should be offline. Then ifplugd is started. Now whenever a network link is availble network is configured and chrony should be switched to online mode due to /etc/network/if-up.d/chrony that I copied there. But apparently that doesn't work. I also tried openntpd, which didn't even start on my system as well as the full blown ntp server which sort of worked, but then it does not provide . Once I even was desperate enough to just start ntpdate every hour with a cron job. On other approach would be to fix the hardware clock such that it would be that much too slow. Maybe replacing the battery could help? Any other ideas? Right now its extremely frustrating cause none of the approaches work to properly and its that I didnt try hard to make it work. Ideally I would have something like chrony but with the enhancement that it would simply work even for suspend and that it just finds out itself whether internet access is there or not. Switching it to online and offline mode via scripts is just extremely error prone IMHO. Any tricks I can play with the chrony configuration to make it work? chrony seems to be quite old, is upstream still alive? Any sensible replacement available? Any ideas? I greatly appreciate it when I could be able to fix up this time stuff without investing another dozen of hours. If I cannot fix chrony easily I probably revert to ntp-simple for now and accept wrong time when the laptop is not with internet access. Regards, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
