Comment 26 for bug 71368

Nope, with fglrx 8.09 the backlight goes off perfectly. With radeon (xserver-xorg-video-ati 1.6.8.0-1 on ubuntu Hardy) the backlight does not go off. I can simulate it by pressing the lid button of my laptop. What happens is that my screen goes off (backlight is off for a sec or so and I don't see my desktop) for a second, then completely comes completely alive (i.e. I see my desktop etc) for less than half a second and then goes completely blank, but with the backlight on. After browsing a bit, I found a clue that there is something related to acpid.

Snippet of /var/log/acpid starting with pressing the button and releasing 5 seconds later:
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[Fri Oct 10 23:43:02 2008] received event "button/lid LID 00000080 00000025"
[Fri Oct 10 23:43:02 2008] notifying client 5109[0:0]
[Fri Oct 10 23:43:02 2008] notifying client 5995[107:116]
[Fri Oct 10 23:43:02 2008] executing action "/etc/acpi/lid.sh"
[Fri Oct 10 23:43:02 2008] BEGIN HANDLER MESSAGES
ERROR: Couldn't attach to DCOP server!
ERROR: Couldn't attach to DCOP server!
[Fri Oct 10 23:43:03 2008] END HANDLER MESSAGES
[Fri Oct 10 23:43:03 2008] action exited with status 1
[Fri Oct 10 23:43:03 2008] completed event "button/lid LID 00000080 00000025"
[Fri Oct 10 23:43:08 2008] received event "button/lid LID 00000080 00000026"
[Fri Oct 10 23:43:08 2008] notifying client 5109[0:0]
[Fri Oct 10 23:43:08 2008] notifying client 5995[107:116]
[Fri Oct 10 23:43:08 2008] executing action "/etc/acpi/lid.sh"
[Fri Oct 10 23:43:08 2008] BEGIN HANDLER MESSAGES
ERROR: Couldn't attach to DCOP server!
[Fri Oct 10 23:43:09 2008] END HANDLER MESSAGES
[Fri Oct 10 23:43:09 2008] action exited with status 1
[Fri Oct 10 23:43:09 2008] completed event "button/lid LID 00000080 00000026"
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