Re: Re: changing screen brightness broken in Xubuntu (12.04 and 14.04)

Benedek Imre nucleo at indamail.hu
Sun Apr 27 09:51:03 UTC 2014


Try this solution:
http://itsfoss.com/fix-brightness-ubuntu-1310/
It worked on my Dell Inspiron laptop with Intel graphics.
Good luck!

-- Eredeti üzenet --
Feladó: Liviu Andronic  <landronimirc at gmail .com>Címzett: Xubuntu Development Discussion  <xubuntu-devel at lists.ubuntu.com>Elküldve: 2014. április 27. 2:28Tárgy : Re: changing screen brightness broken in Xubuntu (12.04 and 14.04)

On Sat, Apr 26, 2014 at 10:26 AM, PK <pliniusminor at gmail.com> wrote:
 > 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.
 >
 Thanks for the tips, but unfortunately none worked for me. I tried
 several workarounds.
 - with no obvious success:
 GRUB_CMDLINE_LINUX="acpi_osi=Linux"
 
 and
 update-grub
 
 - the following has no effect:
 xbacklight -set 20
 
 - and neither does this help:
 root at liv-inspiron:/home/geek# lspci | grep -i vga
 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT
 Integrated Graphics Controller (rev 09)
 03:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
 [AMD/ATI] Venus PRO [Radeon HD 8850M] (rev ff)
 root at liv-inspiron:/home/geek# setpci -s 00:02.0 F4.B=20
 root at liv-inspiron:/home/geek# setpci -s 03:00.0 F4.B=20
 
 
 Any ideas on what else could be wrong? Thanks,
 Liviu
 
 > Regards, Pjotr.
 >
 >
 > 2014-04-26 9:56 GMT+02:00 Liviu Andronic <landronimirc at gmail.com>:
 >>
 >> 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
 >> xubuntu-devel at lists.ubuntu.com
 >> https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel
 >
 >
 >
 > --
 > xubuntu-devel mailing list
 > xubuntu-devel at lists.ubuntu.com
 > https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel
 >
 
 
 
 -- 
 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
 xubuntu-devel at lists.ubuntu.com
 https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel
 
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