acpi_ibm(4) and amd64

[Rong-En Fan]

On Wed, Dec 13, 2006 at 03:27:43AM +0100, Markus Brueffer wrote:
> On Tuesday 12 December 2006 17:51, Rong-En Fan wrote:
> > It seems that it can not get the brightness level. I put my ASL at
> >
> > http://people.freebsd.org/~rafan/x60-1706b69.asl
> >
> > for anyone interested.
> 
> Everything looks right DSDT wise, the EC offset for brightness didn't change.
> I did a quick read through the linux-thinkpad ml archives and it seems that 
> this is a BIOS related problem. Older versions work, but current ones show 
> this problem. What BIOS and EC versions do you have installed?
> 
> Btw: acpi_video(4) should add a brightness sysctl for the lcd (judging from 
> your DSDT). How does this one behave? Does writing to the brightness sysctl 
> have any effect (acpi_ibm(4) and acpi_video(4))?

write to dev.acpi_ibm.0.lcd_brightness work, read not.
read/write hw.acpi.video.lcd0.brightness works well.

But the levels from acpi_video(4) is a bit weird:

hw.acpi.video.lcd0.brightness: 30
hw.acpi.video.lcd0.levels: 100 30 30 40 50 60 70 80 90 100

Or, is this normal?

> > 1) can we safely use acpi_ibm(4) on amd64
> 
> No objections here.
> 
> Markus
> 
> -- 
> Markus Brueffer ?  | GPG-Key: http://people.FreeBSD.org/~markus/markus.asc
> markus at brueffer.de | FP: 3F9B EBE8 F290 E5CC 1447 8760 D48D 1072 78F8 A8D4
> markus at FreeBSD.org | FreeBSD: The Power to Serve!


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