Comment 28 for bug 473552

Revision history for this message
Ben Shephard (ben-bshephard) wrote :

Hello David

Sorry I should have been a bit clearer.
When I posted the last comment I'd installed the patch and rebooted and waited for the battery to charge the last 10 percent or so.
It was still showing a charge rate of 720.0 odd watts.

After the patch install and reboot with the charger still in the indicator showed discharging even though the machine was still plugged in. I've never seen this behaviour before applying the patch. I unplugged for a second and plugged back in and it changed to charging.

When it did reach 100% I unplugged the charger but the indicator remained in the charging state. This time rather than reboot I plugged the charger back in and pulled it out again quickly. this time the charger going off line was properly detected and it's been discharging since (40% as I write)

As for the incorrect charge / discharge rate that is still incorrect when charging but so far as I can tell has been fine so far when discharging. I think this is what was suddenly getting corrupted causing the battery to show as critically low when it's 80% charged.

If it's all of a sudden reporting that the machine is pulling hundreds of watts from a battery with a design charge of 26.6 Wh it would work out the life if the battery to be in the minutes if not seconds depending on how far out of whack the discharge rate was being reported. Of course the high rate when charging is less of an issue because the power manager is aware that the machine is on AC power and won't shut down anyway.

The discharge issue being an intermittent issue there is no way of knowing if this is now fixed without using the machine for a week or so. I've managed to go for up to a week before without the machine shutting down on me but other times it's been four or five times in an evening.

Certainly the patch hasn't fixed everything but I can live with the bugs I've experienced so far since installing it.

It does seem like something is confusing mW for Watts somewhere a long the line.

I noticed somewhere the other day there was a bios update for the aspire one AOA 110-ab so I installed that but there was no changelog with it so I don't know what it was supposed to do but I've not noticed any difference since applying it but just thought it was worth while mentioning.

When I've tested this properly on 9.10 I'm also going to test on Fedora 12 and 13 alpha just to see how they behave too.

Thanks for your help
Ben