Ubuntu
xorg package

LCD panel won't stay powered off

Bug #55648 reported by Davyd
This bug report is a duplicate of:  Bug #847038: [oneiric] backlight always stays on. Edit Remove
4
Affects Status Importance Assigned to Milestone
X.Org X server
Fix Released
Unknown
xorg (Ubuntu)
New
Undecided
Unassigned

Bug Description

Binary package hint: xorg

In Edgy:

Using `xset dpms force off` the LCD on my laptop (Toshiba Portege R200) will turn off and then turn back on with the screen blanked about 20 seconds later.

This happens with and without gnome-screensaver and gnome-power-manager running.

This bug only appeared after recently updating to the latest xorg in edgy.

Revision history for this message
Davyd (davyd) wrote :

This is still present:

[davyd@frobisher ~]$ apt-cache policy xserver-xorg-video-i810
xserver-xorg-video-i810:
  Installed: 1:1.6.5-0ubuntu3
  Candidate: 1:1.6.5-0ubuntu3
  Version table:
 *** 1:1.6.5-0ubuntu3 0
        500 http://archive.ubuntu.com edgy/main Packages
        100 /var/lib/dpkg/status
     1:1.6.5-0ubuntu2 0
        500 http://au.archive.ubuntu.com edgy/main Packages

Revision history for this message
Davyd (davyd) wrote :

Restarting acpid seems to solve this problem.

<mjg59> davyd_: In that case, I suspect it has something to do with faked key events

Revision history for this message
Davyd (davyd) wrote :

More on this, you need to restart acpid after every suspend/resume cycle. Noticed this in the X log:

When X starts up:
(II) Open ACPI successful (/var/run/acpid.socket)
After restarting acpid:
(WW) Open ACPI failed (/var/run/acpid.socket) (Connection refused)
After resuming:
(II) Open ACPI successful (/var/run/acpid.socket)

It seems that it doesn't work while it has a connection to the acpid socket.

Running acpi_listen from another machine. The LCD moves from the off state to the blanked state whenever a 'battery' event appears. eg:
battery BAT1 00000080 00000001
battery BAT2 00000080 00000001

Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Unknown → Confirmed
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Confirmed → In Progress
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: In Progress → Fix Released
Revision history for this message
alonso (honkkis) wrote :

There is a known bug:

https://bugs.freedesktop.org/show_bug.cgi?id=5665

Revision history for this message
Davyd (davyd) wrote :

This is still broken after a suspend/resume cycle (S3). Things are working correctly before suspend/resume.

Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Fix Released → Confirmed
Bug Watch Updater (bug-watch-updater)
Changed in xorg-server:
status: Confirmed → Fix Released
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