can not log on when cmos timer reset

Asked by Le Duc Tho on 2010-02-27

I have an old system, when power down suddenly the cmos timer has been reset (it's the main board trouble).
Then i can not log on until i fix the time in bios setup.
It's really trouble when i setup this OS on my grandpap PC, windows ignores this error.

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This question was originally filed as bug #528943.

Philip Muškovac (yofel) said : #1

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We appreciate the difficulties you are facing, but it would make more sense to raise problems you are having in the support tracker at if you are uncertain if they are bugs. For help on reporting bugs, see

Tom (tom6) said : #2

Hi :)

Perhaps if you could replace the "watch battery" on the mbord then you could fix this problem permanently. Usually when replacing the mbord battery people race against the 30secs deadline before bios setting are reset to factory defaults but in your situation you could take all day to do this.

If you are not used to messing around inside the computer case then i could help but would like to know if you are in England using the normal mains power with it's built in earth?

Once you have Ubuntu installed on the hard-drive then that hard-drive could happily move into a completely new machine without any troubles, except on the Windows side where it will repeatedly say "Found new hardware". To upgrade the machine more slowly you might be able to find a slightly newer 2nd hand mbord that can use all the existing devices and fans. Also often offices have old machines hiding away in cupboards or machines on skips might have usseful parts such as fans, mbord, hard-drives, sometimes even entire machines. Windows usually requires such fast upgrade cycle that even quite new machines can be found in the skips of affluent areas of town. Don't bother to dig around in them too much as skips can be hazardous and also take care because often computer cases have extremely sharp edges, especially inside. Linux can easily revive almost all machines that get dumped or tucked away although it may take a different distro such as Wolvix Hunter 1.1.0
or perhaps something even lighter. Ubuntu is more aimed at top-end machines. So obviously you have a reasonably high spec machine there :)

Good luck with this project :)
Many regards from
Tom :)

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