[SOLVED!] Re: Gutsy: closing laptop lid makes screen blink

[Galvanick Lucipher]

	After much searching, I found the cause of the problem (and the solution!) on

	http://tinyurl.com/38frty

	and

	http://ubuntuforums.org/showthread.php?t=587390&page=3

	There are a fair number of bugs open in Launchpad on account of this problem, 
so I hope this is useful to somebody.

	Cheers,

	G. L.

On Wednesday 05 March 2008 16:44:44 Galvanick Lucipher wrote:
> 	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.

-- 
He who is in love with himself has at least this advantage -- he won't
encounter many rivals.
		-- Georg Lichtenberg, "Aphorisms"


		
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