Ubuntu 8.10 on Sony Vaio: lcd brightness misbehavior

[bert cash]

I just installed Ubuntu 8.10 Intrepid on my Sony Vaio VGN T250P and am experiencing the following serious problems:

1) The screen brightness dims by itself and gets progressively darker and darker sometimes to almost unreadable levels of dimming.
2)Then I try to use the Fn + F6 key combination to increase screen brightness but the applet takes a long time to show up and respond to the key command. Eventually it shows up but then the dimming problem occurs again after a short while.

[Joel Borggrén-Franck (jbf)]

Not sure these are related, but you might want to look at this bug: https://bugs.launchpad.net/ubuntu/+bug/292612

[Joel Borggrén-Franck (jbf)]

A workaround I found is to disable "Dim display when idle" (under both AC and battery) in System > Preferences > Power Management.

[bitzer (bitzer)]

I confirm this bug on my VAIO VGN C1S/H: screen brightness dims down by itself and power manager has a slow startup on system start.

[Eric (huge-angry-lunatic)]

I observe exactly this phenomenon on my IBM X41 laptop with Intel i915gm graphics.

I will try Mr. Borggren-Franck's workaround, but a real solution would be great.

[Pedro Villavicencio (pedro)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Could you try to reproduce the same with Ubuntu 9.04? Thanks in advance.

[Joel Borggrén-Franck (jbf)]

I've enabled dim on both AC and battery and I this doesn't seem to reproduce on Jaunty.

[xteejx (xteejx)]

This bug report is being closed due to your last comment regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.