Gutsy: closing laptop lid makes screen blink

[Galvanick Lucipher]

	Hi everybody, 

	I sent a message some months ago about a weird ACPI(?) bug in Feisty, but 
found no solution. The bug is still in Hardy Alphas 4 and 5. 

	I have reported it as Launchpad bug #173519. Below is my original description 
of the problem in Feisty, slightly edited for things I've discarded:

> 	I installed Kubuntu Gutsy on my laptop, and everything has worked
> flawlessly except one thing: whenever I press the lid button, the screen
> doesn't blank immediately; instead, it stays on a few seconds and then
> starts blinking on and off at random times, apparently whenever a thermal 
> zone event is sent. Sometimes, the screensaver also kicks in, even when I 
> switch it off from the control panel.
>
> 	I have observed the problem even when booting from the live CD before
> installation. Removing the KDE screensavers does not solve the problem, nor
> restarting X. I have to reboot the computer to get it working normally. Is
> it possible that the problem is in the kernel's power management modules?
>
> 	Needless to say, the computer is unusable under these conditions, so I've
> been forced to go back to Feisty for the moment.
>
> 	My system is a HP 6120 laptop  with a 2.0 GHz Pentium-M, 512 MB RAM,
> running an unmodified Kubuntu Gutsy.

	This is what gets written to /var/log/acpid during the blackouts in Hardy 
Alpha 5:

***********************************************
[Mon Mar  3 16:08:02 2008] received event "thermal_zone TZ1 00000081 00000000"
[Mon Mar  3 16:08:02 2008] notifying client 5398[0:0]
[Mon Mar  3 16:08:02 2008] notifying client 5664[108:118]
[Mon Mar  3 16:08:02 2008] completed event "thermal_zone TZ1 00000081 
00000000"
[Mon Mar  3 16:08:02 2008] received event "video C055 00000080 00000000"
[Mon Mar  3 16:08:02 2008] notifying client 5398[0:0]
[Mon Mar  3 16:08:02 2008] notifying client 5664[108:118]
[Mon Mar  3 16:08:02 2008] executing action "/etc/acpi/videobtn.sh"
[Mon Mar  3 16:08:02 2008] BEGIN HANDLER MESSAGES
[Mon Mar  3 16:08:03 2008] END HANDLER MESSAGES
[Mon Mar  3 16:08:03 2008] action exited with status 0
[Mon Mar  3 16:08:03 2008] completed event "video C055 00000080 00000000"
[Mon Mar  3 16:08:03 2008] received event "button/lid C1E5 00000080 00000046"
[Mon Mar  3 16:08:03 2008] notifying client 5398[0:0]
[Mon Mar  3 16:08:03 2008] notifying client 5664[108:118]
[Mon Mar  3 16:08:03 2008] executing action "/etc/acpi/lid.sh"
[Mon Mar  3 16:08:03 2008] BEGIN HANDLER MESSAGES
ERROR: Couldn't attach to DCOP server!
/usr/share/acpi-support/screenblank: line 6: [: 10256: unary operator expected
[Mon Mar  3 16:08:04 2008] END HANDLER MESSAGES
[Mon Mar  3 16:08:04 2008] action exited with status 1
[Mon Mar  3 16:08:04 2008] completed event "button/lid C1E5 00000080 00000046"
****************************


	Besides, /proc/acpi/button/lid/C1E5/state shows "closed", even when the lid 
is open and the lid button clearly not pushed.

	I have compared the /etc/acpi/lid.sh in the faulty distros (Gutsy and Hardy) 
with the one in Feisty (which works perfectly) and both are identical, so it 
doesn't seem to be a script problem. However, I've compiled several kernels 
by hand and the exact same kernels only show this bug under the faulty Gutsy 
and Hardy, but not under Feisty, so it doesn't seem to be a acpi module 
problem either.

	Any suggestions? I've tried everything I know, without success. The bug is 
annoying enough to make the system unusable, so if I can't solve it I'll have 
to switch to another distro once Feisty ceases to be maintained, which would 
be a pity bcause other wise it works perfectly here.

	Thank you very much in advance,

	G.L.


-- 
Your worship is your furnaces
which, like old idols, lost obscenes,
have molten bowels; your vision is
machines for making more machines.
		-- Gordon Bottomley, 1874

		
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