Re: Considering GNOME 3.12 as an F20 update - brightness problems

[Jorick Astrego]

On Thu, 2014-04-17 at 12:00 +0000,
[e-mail] wrote:
> I've hit another annoying problem. I cannot change brightness level.
> The
> Fn keys don't work at all, when changing it in the user menu or power
> management settings it changes the backlight randomly in one of ten
> attempts. Moreover indicator in the user menu always shows zero level
> of
> backlight.
> I always blamed drivers or something lower in the graphics stack for
> this. But it works perfectly in KDE and I can also change backlight
> with
> xbacklight or xrandr.
> I'm using up-to-date Fedora 20+GNOME 3.12 Copr on Lenovo X240.
> Anyone has hit the same problem?
> BTW the more I'm using GNOME 3.12 the more I think it's not ready for
> the prime time. I'd rather wait for fixing releases.
>
> Jiri

I fixed this on mij Lenovo bij adding  << Option "RegistryDwords"
"EnableBrightnessControl=1" >> to /etc/X11/xorg.conf in the "Device"
section:

Section "Device"
            Identifier     "Videocard0"
            Driver         "nvidia"
            Option "RegistryDwords" "EnableBrightnessControl=1"
        EndSection

Kind regards,

Jorick Astrego
Netbulae B.V.

Considering GNOME 3.12 as an F20 update - brightness problems

[Jiri Eischmann]

Jorick Astrego píše v Čt 17. 04. 2014 v 15:40 +0200:
> On Thu, 2014-04-17 at 12:00 +0000,
> [e-mail] wrote:
> > I've hit another annoying problem. I cannot change brightness level.
> > The
> > Fn keys don't work at all, when changing it in the user menu or
> > power
> > management settings it changes the backlight randomly in one of ten
> > attempts. Moreover indicator in the user menu always shows zero
> > level of
> > backlight.
> > I always blamed drivers or something lower in the graphics stack for
> > this. But it works perfectly in KDE and I can also change backlight
> > with
> > xbacklight or xrandr.
> > I'm using up-to-date Fedora 20+GNOME 3.12 Copr on Lenovo X240.
> > Anyone has hit the same problem?
> > BTW the more I'm using GNOME 3.12 the more I think it's not ready
> > for
> > the prime time. I'd rather wait for fixing releases.
> >
> > Jiri
>
> I fixed this on mij Lenovo bij adding  << Option "RegistryDwords"
> "EnableBrightnessControl=1" >> to /etc/X11/xorg.conf in the "Device"
> section:
>     Section "Device"
>         Identifier     "Videocard0"
>         Driver         "nvidia"
>         Option "RegistryDwords" "EnableBrightnessControl=1"
>     EndSection
>
> Kind regards,

This didn't help. What did help, though, was adding
acpi_backlight=vendor as a boot parametr. Unfortunately, it doesn't
solve the problem completely. GNOME still doesn't remember the backlight
level from the last session and sets it to 0. So I boot into a black
screen, have to adjust it manually, log in, and adjust it manually once
again because it's set to 0 again.

Jiri

Considering GNOME 3.12 as an F20 update - brightness problems

[Bastien Nocera]

----- Original Message -----
> Jorick Astrego píše v Čt 17. 04. 2014 v 15:40 +0200:
> > On Thu, 2014-04-17 at 12:00 +0000,
> > [e-mail] wrote:
> > > I've hit another annoying problem. I cannot change brightness level.
> > > The
> > > Fn keys don't work at all, when changing it in the user menu or
> > > power
> > > management settings it changes the backlight randomly in one of ten
> > > attempts. Moreover indicator in the user menu always shows zero
> > > level of
> > > backlight.
> > > I always blamed drivers or something lower in the graphics stack for
> > > this. But it works perfectly in KDE and I can also change backlight
> > > with
> > > xbacklight or xrandr.
> > > I'm using up-to-date Fedora 20+GNOME 3.12 Copr on Lenovo X240.
> > > Anyone has hit the same problem?
> > > BTW the more I'm using GNOME 3.12 the more I think it's not ready
> > > for
> > > the prime time. I'd rather wait for fixing releases.
> > >
> > > Jiri
> >
> > I fixed this on mij Lenovo bij adding  << Option "RegistryDwords"
> > "EnableBrightnessControl=1" >> to /etc/X11/xorg.conf in the "Device"
> > section:
> >     Section "Device"
> >         Identifier     "Videocard0"
> >         Driver         "nvidia"
> >         Option "RegistryDwords" "EnableBrightnessControl=1"
> >     EndSection
> >
> > Kind regards,
>
> This didn't help. What did help, though, was adding
> acpi_backlight=vendor as a boot parametr. Unfortunately, it doesn't
> solve the problem completely. GNOME still doesn't remember the backlight
> level from the last session and sets it to 0. So I boot into a black
> screen, have to adjust it manually, log in, and adjust it manually once
> again because it's set to 0 again.

As I mentioned in the upstream bug, GNOME doesn't try to remember the backlight
level, which would be why it doesn't...

The discussion will continue here:
https://bugzilla.gnome.org/show_bug.cgi?id=728354

I see no point in having to answer comments on both.

Cheers