* Controlling backlight on thinkpad x60
@ 2008-09-08 15:10 Pavel Machek
2008-09-08 15:54 ` Matthew Garrett
0 siblings, 1 reply; 7+ messages in thread
From: Pavel Machek @ 2008-09-08 15:10 UTC (permalink / raw)
To: kernel list; +Cc: ACPI mailing list
Hi!
Some time ago, FN-Home/End just adjusted the brightness, and
/proc/acpi/ibm contained backlight control.
In 2.6.27-rc5, /proc/acpi/ibm does not contain backlight control and
/sys/class/backlight is empty...
(I do have CONFIG_ACPI_VIDEO disabled, it killed my machine last time
I enabled it, is it mandatory now?)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Controlling backlight on thinkpad x60
2008-09-08 15:10 Controlling backlight on thinkpad x60 Pavel Machek
@ 2008-09-08 15:54 ` Matthew Garrett
2008-09-09 15:29 ` [regression] " Pavel Machek
0 siblings, 1 reply; 7+ messages in thread
From: Matthew Garrett @ 2008-09-08 15:54 UTC (permalink / raw)
To: Pavel Machek; +Cc: kernel list, ACPI mailing list
On Mon, Sep 08, 2008 at 05:10:58PM +0200, Pavel Machek wrote:
> (I do have CONFIG_ACPI_VIDEO disabled, it killed my machine last time
> I enabled it, is it mandatory now?)
On Thinkpads with ACPI video support, yes.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 7+ messages in thread
* [regression] Re: Controlling backlight on thinkpad x60
2008-09-08 15:54 ` Matthew Garrett
@ 2008-09-09 15:29 ` Pavel Machek
2008-09-09 15:36 ` Pavel Machek
2008-09-09 16:42 ` Matthew Garrett
0 siblings, 2 replies; 7+ messages in thread
From: Pavel Machek @ 2008-09-09 15:29 UTC (permalink / raw)
To: Matthew Garrett; +Cc: kernel list, ACPI mailing list, Rafael J. Wysocki
On Mon 2008-09-08 16:54:58, Matthew Garrett wrote:
> On Mon, Sep 08, 2008 at 05:10:58PM +0200, Pavel Machek wrote:
>
> > (I do have CONFIG_ACPI_VIDEO disabled, it killed my machine last time
> > I enabled it, is it mandatory now?)
>
> On Thinkpads with ACPI video support, yes.
That's bad then, because ACPI video support does not work here. I can
boot, and even Fn-home/end works, but it breaks with X.
In old versions, it resulted on black screen after LID close in X.
In 2.6.27-rc5, screen goes black as soon as X are started.
(In old versions, I could use ibm-acpi, and fn-home/end worked even
without CONFIG_ACPI_VIDEO...)
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [regression] Re: Controlling backlight on thinkpad x60
2008-09-09 15:29 ` [regression] " Pavel Machek
@ 2008-09-09 15:36 ` Pavel Machek
2008-09-09 16:42 ` Matthew Garrett
1 sibling, 0 replies; 7+ messages in thread
From: Pavel Machek @ 2008-09-09 15:36 UTC (permalink / raw)
To: Matthew Garrett; +Cc: kernel list, ACPI mailing list, Rafael J. Wysocki
On Tue 2008-09-09 17:28:59, Pavel Machek wrote:
> On Mon 2008-09-08 16:54:58, Matthew Garrett wrote:
> > On Mon, Sep 08, 2008 at 05:10:58PM +0200, Pavel Machek wrote:
> >
> > > (I do have CONFIG_ACPI_VIDEO disabled, it killed my machine last time
> > > I enabled it, is it mandatory now?)
> >
> > On Thinkpads with ACPI video support, yes.
>
> That's bad then, because ACPI video support does not work here. I can
> boot, and even Fn-home/end works, but it breaks with X.
>
> In old versions, it resulted on black screen after LID close in X.
>
> In 2.6.27-rc5, screen goes black as soon as X are started.
Hmm, I have updated my X server, and it now works with
ACPI_VIDEO... which means that this is probably not affecting huge
number of people.
Hmm... something is still funny. I have
root@amd:/sys/class/backlight/acpi_video0# echo 1 > brightness
root@amd:/sys/class/backlight/acpi_video0# echo 0 > brightness
root@amd:/sys/class/backlight/acpi_video0# cd ../acpi_video1/
root@amd:/sys/class/backlight/acpi_video1# echo 0 > brightness
root@amd:/sys/class/backlight/acpi_video1# echo 7 > brightness
root@amd:/sys/class/backlight/acpi_video1# echo 0 > brightness
...and both acpi_video0 *and* acpi_video1 works... strange.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [regression] Re: Controlling backlight on thinkpad x60
2008-09-09 15:29 ` [regression] " Pavel Machek
2008-09-09 15:36 ` Pavel Machek
@ 2008-09-09 16:42 ` Matthew Garrett
2008-09-09 16:55 ` Pavel Machek
1 sibling, 1 reply; 7+ messages in thread
From: Matthew Garrett @ 2008-09-09 16:42 UTC (permalink / raw)
To: Pavel Machek; +Cc: kernel list, ACPI mailing list, Rafael J. Wysocki
On Tue, Sep 09, 2008 at 05:29:00PM +0200, Pavel Machek wrote:
> That's bad then, because ACPI video support does not work here. I can
> boot, and even Fn-home/end works, but it breaks with X.
>
> In old versions, it resulted on black screen after LID close in X.
Yeah, X did retarded things in response to video events. That's been
fixed for ages.
> In 2.6.27-rc5, screen goes black as soon as X are started.
That sounds bizarre, and I can't reproduce it here.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [regression] Re: Controlling backlight on thinkpad x60
2008-09-09 16:42 ` Matthew Garrett
@ 2008-09-09 16:55 ` Pavel Machek
2008-09-09 16:58 ` Matthew Garrett
0 siblings, 1 reply; 7+ messages in thread
From: Pavel Machek @ 2008-09-09 16:55 UTC (permalink / raw)
To: Matthew Garrett; +Cc: kernel list, ACPI mailing list, Rafael J. Wysocki
On Tue 2008-09-09 17:42:54, Matthew Garrett wrote:
> On Tue, Sep 09, 2008 at 05:29:00PM +0200, Pavel Machek wrote:
> > That's bad then, because ACPI video support does not work here. I can
> > boot, and even Fn-home/end works, but it breaks with X.
> >
> > In old versions, it resulted on black screen after LID close in X.
>
> Yeah, X did retarded things in response to video events. That's been
> fixed for ages.
>
> > In 2.6.27-rc5, screen goes black as soon as X are started.
>
> That sounds bizarre, and I can't reproduce it here.
It was same old X. New X fix that. But I still have two backlight devices...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [regression] Re: Controlling backlight on thinkpad x60
2008-09-09 16:55 ` Pavel Machek
@ 2008-09-09 16:58 ` Matthew Garrett
0 siblings, 0 replies; 7+ messages in thread
From: Matthew Garrett @ 2008-09-09 16:58 UTC (permalink / raw)
To: Pavel Machek; +Cc: kernel list, ACPI mailing list, Rafael J. Wysocki
On Tue, Sep 09, 2008 at 06:55:58PM +0200, Pavel Machek wrote:
> It was same old X. New X fix that. But I still have two backlight devices...
Should be fixed in .28. Sorry about that, confusion over which DRM
branches were getting merged meant it missed .27.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2008-09-09 16:58 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2008-09-08 15:10 Controlling backlight on thinkpad x60 Pavel Machek
2008-09-08 15:54 ` Matthew Garrett
2008-09-09 15:29 ` [regression] " Pavel Machek
2008-09-09 15:36 ` Pavel Machek
2008-09-09 16:42 ` Matthew Garrett
2008-09-09 16:55 ` Pavel Machek
2008-09-09 16:58 ` Matthew Garrett
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