Laptop backlight brightness increases/decreases 2 steps each time
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gnome-power-manager (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Hi,
I have a Lenovo 3000 N200 laptop which uses a Nvidia Geforce Go 7300 graphics chip.
I noticed this issue in Lubuntu 11.10 with the Nvidia binary driver and also after booting a Xubuntu 12.04 CD (using the Nouveau driver there I think). As far as I can remember, this issue wasn't present with either Ubuntu 8.04 or Xubuntu 9.10.
The laptop has 8 possible backlight brightness settings. At the desktop, increasing or decreasing brightness (by pressing Fn-F10 or Fn-F11) causes the brightness to increase or decrease by 2 steps instead of 1. However, in text mode -- after switching with Ctrl-Alt-F1 -- changing brightness works as it should, in single steps.
I noticed that the page http://
echo N > /sys/module/
Applying that to my laptop fixed the screen brightness double-stepping at the desktop, so now changing brightness works as it should. However after doing that, the brightness cannot be changed at all when in text mode.
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/ /wiki.ubuntu. com/Bugs/ FindRightPackag e. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
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