<div dir="ltr"><div>@ Liviu and Benedek: thanks for sharing these useful workarounds!<br><br></div><div>Both of you could help further, by reporting this on Launchpad.... There are probably more people with your hardware, so a bug report would serve two purposes: it might help to solve the bug, and if not, it might help others with the workaround.<br>
</div><div><br></div>Regards, Pjotr.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-04-27 11:51 GMT+02:00 Benedek Imre <span dir="ltr"><<a href="mailto:nucleo@indamail.hu" target="_blank">nucleo@indamail.hu</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u><div>Try this solution:<br><a href="http://itsfoss.com/fix-brightness-ubuntu-1310/" style="text-decoration:none" target="_blank"><span style="font-size:13px;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:normal;font-style:normal;font-variant:normal;text-decoration:underline;vertical-align:baseline">http://itsfoss.com/fix-brightness-ubuntu-1310/</span></a><br>
It worked on my Dell Inspiron laptop with Intel graphics.<br>Good luck!<br><br><blockquote style="PADDING-LEFT:10px;MARGIN-LEFT:5px;BORDER-LEFT:#6497ce 2px solid;MARGIN-RIGHT:0px">-- Eredeti üzenet --<br><div><b>Feladó:</b> <a href="mailto:landronimirc@gmail.com" target="_blank">Liviu Andronic  <landronimirc@gmail.com></a></div>
<div><b>Címzett: </b><a href="mailto:xubuntu-devel@lists.ubuntu.com" target="_blank">Xubuntu Development Discussion  <xubuntu-devel@lists.ubuntu.com></a></div><div><b>Elküldve:</b> 2014. április 27. 2:28</div><div><b>Tárgy : </b>Re: changing screen brightness broken in Xubuntu (12.04 and 14.04)</div>
<div><div class="h5"><br><br><div style="min-height:auto">On Sat, Apr 26, 2014 at 10:26 AM, PK <<a href="mailto:pliniusminor@gmail.com" target="_blank">pliniusminor@gmail.com</a>> wrote:<br> > Try this:<br> > <a href="https://sites.google.com/site/easylinuxtipsproject/display#TOC" target="_blank">https://sites.google.com/site/easylinuxtipsproject/display#TOC</a>-Brightness-of-the-display-is-wrong-and-not-adjustable<br>
 ><br> > Those tweaks work fine on my machines. :-)<br> ><br> > Not really a Linux error, this; it has to do with BIOS / UEFI that's not<br> > standard-compliant.<br> ><br> Thanks for the tips, but unfortunately none worked for me. I tried<br>
 several workarounds.<br> - with no obvious success:<br> GRUB_CMDLINE_LINUX="acpi_osi=Linux"<br> <br> and<br> update-grub<br> <br> - the following has no effect:<br> xbacklight -set 20<br> <br> - and neither does this help:<br>
 root@liv-inspiron:/home/geek# lspci | grep -i vga<br> 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT<br> Integrated Graphics Controller (rev 09)<br> 03:00.0 VGA compatible controller: Advanced Micro Devices, Inc.<br>
 [AMD/ATI] Venus PRO [Radeon HD 8850M] (rev ff)<br> root@liv-inspiron:/home/geek# setpci -s 00:02.0 F4.B=20<br> root@liv-inspiron:/home/geek# setpci -s 03:00.0 F4.B=20<br> <br> <br> Any ideas on what else could be wrong? Thanks,<br>
 Liviu<br> <br> > Regards, Pjotr.<br> ><br> ><br> > 2014-04-26 9:56 GMT+02:00 Liviu Andronic <<a href="mailto:landronimirc@gmail.com" target="_blank">landronimirc@gmail.com</a>>:<br> >><br> >> 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> >><br> >> --<br> >> Do you know how to read?<br> >> <a href="http://www.alienetworks.com/srtest.cfm" target="_blank">http://www.alienetworks.com/srtest.cfm</a><br>
 >> <a href="http://goodies.xfce.org/projects/applications/xfce4-dict#speed" target="_blank">http://goodies.xfce.org/projects/applications/xfce4-dict#speed</a>-reader<br> >> Do you know how to write?<br> >> <a href="http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e" target="_blank">http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e</a>-mail<br>
 >><br> >> --<br> >> xubuntu-devel mailing list<br> >> <a href="mailto:xubuntu-devel@lists.ubuntu.com" target="_blank">xubuntu-devel@lists.ubuntu.com</a><br> >> <a href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel" target="_blank">https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel</a><br>
 ><br> ><br> ><br> > --<br> > xubuntu-devel mailing list<br> > <a href="mailto:xubuntu-devel@lists.ubuntu.com" target="_blank">xubuntu-devel@lists.ubuntu.com</a><br> > <a href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel" target="_blank">https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel</a><br>
 ><br> <br> <br> <br> -- <br> Do you know how to read?<br> <a href="http://www.alienetworks.com/srtest.cfm" target="_blank">http://www.alienetworks.com/srtest.cfm</a><br> <a href="http://goodies.xfce.org/projects/applications/xfce4-dict#speed" target="_blank">http://goodies.xfce.org/projects/applications/xfce4-dict#speed</a>-reader<br>
 Do you know how to write?<br> <a href="http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e" target="_blank">http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e</a>-mail<br> <br> -- <br> xubuntu-devel mailing list<br>
 <a href="mailto:xubuntu-devel@lists.ubuntu.com" target="_blank">xubuntu-devel@lists.ubuntu.com</a><br> <a href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel" target="_blank">https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel</a><br>
 </div></div></div></blockquote></div>
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