Brightness Hotkeys not working in 9.04, working fine in 8.10 - acer 6920g

@Extreme, thank you for taking the time to help improve ubuntu. Unfotunately, we don't have enough information in order to identify where the problem lies and how to fix it. Can you please walk through the hotkey troubleshooting wiki page at https://wiki.ubuntu.com/Hotkeys/Troubleshooting and report your results back here. Thanks again!

Everything with hotkeys seems fine to me...

btw. Gnome panel aplet for brightness not working, i guess it's ACPI or kernel related issue then

@Extreme: your description indicated that you were getting the gnome-power-notification when pressing the brightness keys; can you confirm that you did *not* see any events while doing

  xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode \2 = \3, state = \1/p'

and pressing the brightness keys (after killing gnome-power-manager and gnome-settings-daemon)?

Thanks!

Also, while in X, can you do

  dbus-monitor --session "type='signal',interface='org.freedesktop.PowerManagement.Backlight'"

and press the brightness controls to see if anything is being sent across dbus? Thanks!

I can see this notification: http://img6.imageshack.us/img6/9995/notification.jpg and events (in attach - brightness.txt).

Here is dbus-monitor result...

Hi,

I had the same problem on my T61 with Ubuntu 9.04, but after the updates of today (2009-03-30) the problem was completely solved.

Regards
Marcel

Hello,

I've the same problem on Acer Aspire 5310. When I press Fn and arrow keys the notifications appears but it indicates minimum level and the brightness doesn't change. If I kill gnome-power-manager it's work fine.

It affects me too... anyway brightness/ACPI stopped working even before jaunty, from 2.6.27-11 generic release.
(see bug #356992: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/356992).

I have the same problem with my Acer Aspire 5738.
The brightness control doesn't work: don't work the Fn keys and doesn't work the brightness control in any way (the auto-darken when battery conected, the bright control via panel icon, etc.)

Thanks to keep me in touch

2009/8/12 Marc-André Turcotte <email address hidden>

> *** This bug is a duplicate of bug 333386 ***
> https://bugs.launchpad.net/bugs/333386
>
> ** This bug has been marked a duplicate of bug 333386
> Acer: Cannot change brightness with 2.6.27-11+ kernel
>
> --
> Brightness Hotkeys not working in 9.04, working fine in 8.10 - acer 6920g
> https://bugs.launchpad.net/bugs/344640
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “gnome-power-manager” package in Ubuntu: Confirmed
>
> Bug description:
> Notebook - ACER 6920G (
> http://www.acer.co.uk/acer/product.do?link=oln23g.redirect&changedAlts=&kcond5e.c2att92=122&CRC=1164770960
> )
>
> In all of the 9.04 releases (including Alpha 6), hotkeys for brightness (Fn
> + > and Fn + <) don't work. Nothing happens. In (K)Ubuntu 8.10, it worked
> flawless... Sound also not working as it should (you can hear it from both -
> internal speakers and line-out in the same time), but this is a major
> issue...
>
> EDIT: Now (after ~150MB of updates) on-screen notification for brightness
> works (as respons to Fn + > and <), but nothing happens with actual
> brightness level... Hope you'll fix it soon
>