Reconfirming, happens for me in Ubuntu 8.10, Kubuntu 8.10, Mint 8.10 and
Xubuntu 8.10. It also occurs when I use (Ctrl+)Alt+Fx to switch to tty.
Switching *between* ttys works fine, but switching to and from tty -
from and to X - reverts brightness to 100% which seems to be my default.
Ergo, as soon as X "blanks" the screen (changes mode?), it's reset.
This happens with the intel, nv and proprietary nvidia drivers, tested
on two different laptops (Advent 4211, Acer Aspire 9815).
$ apt-cache policy acpi
acpi:
Installed: 1.1-1ubuntu1
Candidate: 1.1-1ubuntu1
Version table:
*** 1.1-1ubuntu1 0
500 http://archive.ubuntu.com intrepid/main Packages
100 /var/lib/dpkg/status
$ uname -a
Linux tleilax 2.6.27-10-generic #1 SMP Fri Nov 21 12:00:22 UTC 2008
i686 GNU/Linux
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Backlight brightness level reverts to default after lid re-open
https://bugs.launchpad.net/bugs/247475
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