<div dir="ltr"><div><div>Try this:<br><a href="https://sites.google.com/site/easylinuxtipsproject/display#TOC-Brightness-of-the-display-is-wrong-and-not-adjustable">https://sites.google.com/site/easylinuxtipsproject/display#TOC-Brightness-of-the-display-is-wrong-and-not-adjustable</a><br>
<br></div><div>Those tweaks work fine on my machines. :-)<br></div><div><br></div>Not really a Linux error, this; it has to do with BIOS / UEFI that's not standard-compliant.<br><br></div>Regards, Pjotr.<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">2014-04-26 9:56 GMT+02:00 Liviu Andronic <span dir="ltr"><<a href="mailto:landronimirc@gmail.com" target="_blank">landronimirc@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear all,<br>
For several releases now (12.04 and 14.04) and across several machines<br>
(Lenovo 32-bit and Dell 64-bit), changing brightness settings is<br>
broken. It doesn't work whether I use the laptop buttons to modify<br>
screen brightness (to get the notification changing the percentage,<br>
but actual brightness NOT move one bit) or the Brightness panel-plugin<br>
from xfce4-power-manager (nothing really happens).<br>
<br>
Is this a known issue (or should I report it to Launchpad)? But more<br>
importantly, how can I change screen brightness in Xubuntu (install<br>
gnome-power-manager, etc.)?<br>
<br>
Regards,<br>
Liviu<br>
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