changing screen brightness broken in Xubuntu (12.04 and 14.04)

[Tiago Ribeiro]

Just a quick note since this could be the solution for some people with
this issue.

Same happened to me after installing fglrx because the VariBright was
activated by default in the amdcccle.
After disabling the option and restarted X, all went fine.


Regards,
Tiago


On Sun, Apr 27, 2014 at 1:14 PM, Damian Kleiman <fliakleiman at gmail.com>wrote:

> Xgamma might be "obsolete" like you say, but here it works great.
>
> Regards,
> Damian
>
> 2014-04-27 7:38 GMT-03:00 PK <pliniusminor at gmail.com>:
> > @ Liviu and Benedek: thanks for sharing these useful workarounds!
> >
> > 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.
> >
> > Regards, Pjotr.
> >
> >
> > 2014-04-27 11:51 GMT+02:00 Benedek Imre <nucleo at indamail.hu>:
> >
> >> 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. 2:28
> >> Tárgy : 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
> >>
> >>
> >> --
> >> 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
> >
>
> --
> xubuntu-devel mailing list
> xubuntu-devel at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/xubuntu-devel
>



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