Try this: https://sites.google.com/site/easylinuxtipsproject/display#TOC-Brightness-of-the-display-is-wrong-and-not-adjustable
Those tweaks work fine on my machines. :-) Not really a Linux error, this; it has to do with BIOS / UEFI that's not standard-compliant. Regards, Pjotr. 2014-04-26 9:56 GMT+02:00 Liviu Andronic <[email protected]>: > Dear all, > For several releases now (12.04 and 14.04) and across several machines > (Lenovo 32-bit and Dell 64-bit), changing brightness settings is > broken. It doesn't work whether I use the laptop buttons to modify > screen brightness (to get the notification changing the percentage, > but actual brightness NOT move one bit) or the Brightness panel-plugin > from xfce4-power-manager (nothing really happens). > > Is this a known issue (or should I report it to Launchpad)? But more > importantly, how can I change screen brightness in Xubuntu (install > gnome-power-manager, etc.)? > > Regards, > Liviu > > -- > Do you know how to read? > http://www.alienetworks.com/srtest.cfm > http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader > Do you know how to write? > http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail > > -- > xubuntu-devel mailing list > [email protected] > https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel >
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