Keyboard back-light partially doesn't work on Macbook Pro 6,2

Bug #854596 reported by Daniel Graziotin
14
This bug affects 2 people
Affects Status Importance Assigned to Milestone
pommed (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

1) $ lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10
It's daily updated
2) $ apt-cache policy pommed
pommed:
  Installed: 1.39~dfsg-1
  Candidate: 1.39~dfsg-1
  Version table:
 *** 1.39~dfsg-1 0
        500 http://it.archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages
        100 /var/lib/dpkg/status
3) On pressing F5 and F6 keys (Macbook Pro keys for adjusting keyboard backlight), I should be able to reach 0% and 100% keyboard backlight
4) -By continuously pressing F5 I can reach 0% keyboard backlight but the Gnome/Unity popup indicator shows 100%
    -If I am at 0% keyboard back-light and press F6 once, I immediately reach about 100% keyboard back-light and need to press F5 up to the desired value

Please let me know if you need additional data and where to find it

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in pommed (Ubuntu):
status: New → Confirmed
Revision history for this message
Fran Diéguez (frandieguez) wrote :

Same here with my MBP 8,2. I think that this happens in all MBP

Revision history for this message
Chascon (chascone) wrote :

"3) On pressing F5 and F6 keys (Macbook Pro keys for adjusting keyboard backlight), I should be able to reach 0% and 100% keyboard backlight"

I get this same behaviour, only it's F8 that is supposed to take me to 0% on my MBP 1,1.

F10 (my brighten button) takes me right up to 100%. One would think that this should be gradual.

The interesting thing is that both F9 (my dimmer button) and F8 (my cut-to-0% button) mirror each other in that they both perform the same function, gradually dimming the keyboard back-light, so I don't have cut-to-0% functionality.

Specs of Computer affected
Pommed version: 1.39~dfsg-2

Hardware
First generation (2006) Intel MacBook Pro (Intel Core Duo, aka Yonah based processor) with an ATI Mbility Radeon X1600 video card.

Description: Ubuntu 11.10
Release: 11.10

uname -r
3.0.0-12-generic

Revision history for this message
Chascon (chascone) wrote :

And to make matters worse, when I do get to 0%, the alert image shows 100%.

This package is really wonky, to say the least.

Revision history for this message
Li Li (lli5) wrote :

For 3) & 4) above (0% --> 100% issue), could you please try if the following patch could solve it? https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/913793

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