[vivid regression] brightness keys aren't recognized

[Nicholas Skaggs]

Hardware keys on an inspirion 3137 for brightness don't work. Manually setting the backlight via /sys/class/backlight/intel_backlight/brightness
 works properly. This worked properly in utopic and has been broken since upgrade to vivid.

Xev doesn't show a keypress event. Scan codes from evtest are shown below:

Event: time 1416367751.898584, -------------- EV_SYN ------------
Event: time 1416367754.952917, type 4 (EV_MSC), code 4 (MSC_SCAN), value 85
Event: time 1416367754.952917, type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 1
Event: time 1416367754.952917, -------------- EV_SYN ------------
Event: time 1416367754.952946, type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 0
Event: time 1416367754.952946, -------------- EV_SYN ------------
Event: time 1416367756.898936, type 4 (EV_MSC), code 4 (MSC_SCAN), value 86
Event: time 1416367756.898936, type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 1
Event: time 1416367756.898936, -------------- EV_SYN ------------
Event: time 1416367756.898968, type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 0

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: udev 215-5ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu10
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Nov 18 22:16:25 2014
InstallationDate: Installed on 2014-06-04 (167 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 3137
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=0e352344-90e9-4cbe-acde-376a88cf5b47 ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: Upgraded to vivid on 2014-06-04 (167 days ago)
dmi.bios.date: 12/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0PRDX0
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd12/25/2013:svnDellInc.:pnInspiron3137:pvr:rvnDellInc.:rn0PRDX0:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 3137
dmi.sys.vendor: Dell Inc.

[Nicholas Skaggs (nskaggs)]

Looks like potentially another bug, as apport things I upgraded on my original install date;

UpgradeStatus: Upgraded to vivid on 2014-06-04 (167 days ago)

[Nicholas Skaggs (nskaggs)]

Ahh, that's https://bugs.launchpad.net/ubuntu/+source/apport/+bug/788936

[Martin Pitt (pitti)]

Thanks, so as the KEY_BRIGHTNESS{UP/DOWN} evdev events are correctly generated this isn't an udev regression. Thus reassigning to settings-daemon for now, as this is the component that is supposed to react to these keys. This might likely be fallout from the upower 0.9 → 0.99 transition.

[Martin Pitt (pitti)]

FTR, my Thinkpad X230 seems to work differently, the brightness keys are handled directly in hardware there. I don't get an evdev event nor the bubble notifications. So I'm afraid I can't debug this myself easily.

[Jean-Baptiste Lallement (jibel)]

Confirmed on an Asus UX32VD

[Sean V Kelley (seanvk)]

This also affects my MacBook Pro 11,1 with Retina Display running 15.04 (vivid). Brightness keys do not work. But command line /sys/class/backlight/intel_backlight/ does work for manual adjustment.

Sean

[Iain Lane (laney)]

I can't test / verify this myself, but please try the update I'm about to push to vivid.

If it doesn't fix this bug, reopen it.

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity-settings-daemon - 15.04.1+15.04.20141127-0ubuntu1

---------------
unity-settings-daemon (15.04.1+15.04.20141127-0ubuntu1) vivid; urgency=medium

  [ Iain Lane ]
  * Add patch from Tim Lunn to support upower 0.99 properly. (LP: #1394063)

  [ Dmitry Shachnev ]
  * Add Gtk/DecorationLayout XSettings export (based on
    org.gnome.desktop.wm.preferences button-layout GSettings key).
 -- Ubuntu daily release <email address hidden> Thu, 27 Nov 2014 11:42:11 +0000