[ltp] Re: Re: Re: Question on X60 (additional note for Z61t)

Thu, 08 Mar 2007 06:58:16 +0000

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Yes, I see the same on my X60 with the video module blacklisted - when
using Fn-Home/End, the value in /proc/acpi/ibm/brightness doesn't
change. 

I definitely get 8 levels (0-7) from /proc/acpi/ibm/brightness even with
video blacklisted, however, and it still takes the right number of
Fn-Home/End keystrokes to get to back to full brightness.

Blacklisting doesn't seem to stop /proc/acpi/ibm/brightness working, but
it does stop Fn-Home/End from turning the X display permanently black.

On Thu, 2007-03-08 at 07:19 +0100, Fredrik Wendt wrote:

> Ian Redfern wrote:
> > To get the brightness keys to work under Ubuntu Feisty try adding
> > "blacklist video" to /etc/modprobe.d/blacklist - see
> > http://ubuntuforums.org/showthread.php?t=350562
> 
> I tried this on my Z61t (9443-4GG) and it's true that the Fn+End and Fn
> +Home key combinations now correctly dims or brightens the screen. It
> previously didn't hang things - it just cycled the screen from a blank
> VT a couple of times (most of the time this was three or four times) and
> then back to X (at least by the looks of it - a blank black screen). 
> 
> However, on my laptop, blaclisting the video module affects
> the /proc/acpi/ibm/brightness accordingly:
> 
> Using the key combinations it's clear that we actually have 8 different
> levels (on the eightth (8th) key hit, nothing happens), the proc-acpi
> file says there are 7 levels.
> 
> I can dim the screen using "echo level 1 > /proc/acpi/ibm/brightness"
> but it only lowers the brightness to a fix level no matter if I echo
> level 1 or level 5 for instance. (It only takes one Fn+Home key stroke
> to get back to full brightness (no matter what "level" I echoed into the
> file).)
> 
> cat /proc/acpi/ibm/brightness always shows whatever was written/echoed
> to the file last - it's value doesn't change after hitting Fn+Home/End.
> 
> 
> Fn+F2 works.
> 
> /
> 	Fredrik Wendt (first post to this list)

Ian Redfern MIET
Telecoms Consultant
_________________________________________
LogicaCMG - Releasing your potential
75 Hampstead Road
London NW1 2PL, UK
T: +44 (0) 20 7637 9111
E: Ian.Redfern@LogicaCMG.Com
www.logicacmg.com

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Yes, I see the same on my X60 with the video module blacklisted - when using Fn-Home/End, the value in /proc/acpi/ibm/brightness doesn't change. 
 
I definitely get 8 levels (0-7) from /proc/acpi/ibm/brightness even with video blacklisted, however, and it still takes the right number of Fn-Home/End keystrokes to get to back to full brightness. 
 
Blacklisting doesn't seem to stop /proc/acpi/ibm/brightness working, but it does stop Fn-Home/End from turning the X display permanently black. 
 
On Thu, 2007-03-08 at 07:19 +0100, Fredrik Wendt wrote:
<BLOCKQUOTE TYPE=CITE>
<PRE>
Ian Redfern wrote:
&gt; To get the brightness keys to work under Ubuntu Feisty try adding
&gt; &quot;blacklist video&quot; to /etc/modprobe.d/blacklist - see
&gt; <A HREF="http://ubuntuforums.org/showthread.php?t=350562">http://ubuntuforums.org/showthread.php?t=350562</A>

I tried this on my Z61t (9443-4GG) and it's true that the Fn+End and Fn
+Home key combinations now correctly dims or brightens the screen. It
previously didn't hang things - it just cycled the screen from a blank
VT a couple of times (most of the time this was three or four times) and
then back to X (at least by the looks of it - a blank black screen).

<FONT COLOR="#000000">However, on my laptop, blaclisting the video module affects</FONT>
<FONT COLOR="#000000">the /proc/acpi/ibm/brightness accordingly:</FONT>

<FONT COLOR="#000000">Using the key combinations it's clear that we actually have 8 different</FONT>
<FONT COLOR="#000000">levels (on the eightth (8th) key hit, nothing happens), the proc-acpi</FONT>
<FONT COLOR="#000000">file says there are 7 levels.</FONT>

I can dim the screen using &quot;echo level 1 &gt; /proc/acpi/ibm/brightness&quot;
but it only lowers the brightness to a fix level no matter if I echo
level 1 or level 5 for instance. (It only takes one Fn+Home key stroke
to get back to full brightness (no matter what &quot;level&quot; I echoed into the
file).)

<FONT COLOR="#000000">cat /proc/acpi/ibm/brightness always shows whatever was written/echoed</FONT>
<FONT COLOR="#000000">to the file last - it's value doesn't change after hitting Fn+Home/End.</FONT>

<FONT COLOR="#000000">Fn+F2 works.</FONT>

/
	Fredrik Wendt (first post to this list)
</PRE>
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Ian Redfern MIET 
Telecoms Consultant 
_________________________________________ 
LogicaCMG - Releasing your potential 
75 Hampstead Road 
London NW1 2PL, UK 
T: +44 (0) 20 7637 9111 
E: <A HREF="mailto:Ian.Redfern@LogicaCMG.Com">Ian.Redfern@LogicaCMG.Com</A> 
<A HREF="http://www.logicacmg.com">www.logicacmg.com</A>
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