How can I help with thinkpad x220 issues?

[Lars Engels]

On Fri, May 25, 2012 at 08:25:47PM -0700, Kevin Oberman wrote:
> On Wed, May 23, 2012 at 11:55 PM, Lars Engels <lars.engels at 0x20.net> wrote:
> > On Wed, May 23, 2012 at 03:19:14PM -0700, Kevin Oberman wrote:
> >> On Wed, May 23, 2012 at 8:13 AM, Natacha Porté <natbsd at instinctive.eu> wrote:
> >> > Hello,
> >> >
> >> > I happen to be the owner of a brand new Lenovo Thinkpad X220. From a
> >> > recent thread here I gather it almost works with FreeBSD, and the
> >> > remaining problems are screen brightness and screen left unpowered at
> >> > resume. Is that right?
> >> >
> >> > So my question is, how can I help make progress in any of these area?
> >> > (though I admit I'm more interested in having the brightness problem
> >> > solved than the resume one)
> >> >
> >> > I don't know anything about ACPI or about FreeBSD or Linux internals,
> >> > but I'm quite proficient in C and somewhat used to navigate in unknown
> >> > huge code bases.
> >> >
> >> > So I guess the first steps to help would be to first learn stuff.
> >> >
> >> > However I don't have much time available. I guess FreeBSD 11 would reach
> >> > end-of-life before I could reach a level of understanding I find
> >> > satisfying (though I admit I have high standards there), so I would have
> >> > to prioritize. So my question is rather *what* should I learn to provide
> >> > help as soon as possible?
> >> >
> >> > For example, if the brightness issue is just a matter of extracting the
> >> > right numbers from linux kernel code and plug them into FreeBSD, I
> >> > probably won't need to learn anything more about ACPI than what I would
> >> > gather looking at the code. I guess if it was that simple someone would
> >> > have already done it, but that illustrate well my point about
> >> > prioritizing learning.
> >> >
> >> > Or is the barrier of entry too high for me to be of any use?
> >>
> >> If it has not been committed, the minor fix to make acpi_ibm work on
> >> modern ThinkPads needs to be committed. Once done, the issues
> >> mentioned need to be addressed.This includes getting brightness to be
> >> setable from both the keypad hot-keys and from applications. ATM, I
> >> can set the brightness, but making the hot-keys work will require the
> >> ability to extract the current level so that it may be adjusted
> >> plus/minus one.
> >>
> >> The other issue is volume control keys don't work. I suspect it will
> >> be similar to brightness, but I don't know just how to figure it out.
> >>
> >> I should also mention that I don't have an X220. I have a T520, but
> >> the issues seem to be identical, so fixing one will probably fix a lot
> >> of recent ThinkPads.
> >
> > About the key:
> >
> > Did you try loading "acpi_ibm", "sysctl dev.acpi_ibm.0.events=1",
> > "cat /var/run/devd.pipe" and then press the keys. Does anything show up?
> 
> After adding LEN0068 ti the ACPI IDs, I tried this and I get no ACPI
> event when pressing either button, but I do get regular key press
> events:
> KeyPress event, serial 30, synthetic NO, window 0x4600001,
>     root 0x121, subw 0x0, time 166670035, (96,121), root:(100,750),
>     state 0x0, keycode 176 (keysym 0x1008ff13, XF86AudioRaiseVolume),
> same_screen YES,
>     XLookupString gives 0 bytes:
>     XmbLookupString gives 0 bytes:
>     XFilterEvent returns: False
> 
> KeyRelease event, serial 33, synthetic NO, window 0x4600001,
>     root 0x121, subw 0x0, time 166670185, (96,121), root:(100,750),
>     state 0x0, keycode 176 (keysym 0x1008ff13, XF86AudioRaiseVolume),
> same_screen YES,
>     XLookupString gives 0 bytes:
>     XFilterEvent returns: False
> 
> KeyPress event, serial 33, synthetic NO, window 0x4600001,
>     root 0x121, subw 0x0, time 166927339, (98,0), root:(102,629),
>     state 0x0, keycode 174 (keysym 0x1008ff11, XF86AudioLowerVolume),
> same_screen YES,
>     XLookupString gives 0 bytes:
>     XmbLookupString gives 0 bytes:
>     XFilterEvent returns: False
> 
> KeyRelease event, serial 33, synthetic NO, window 0x4600001,
>     root 0x121, subw 0x0, time 166927451, (98,0), root:(102,629),
>     state 0x0, keycode 174 (keysym 0x1008ff11, XF86AudioLowerVolume),
> same_screen YES,
>     XLookupString gives 0 bytes:
>     XFilterEvent returns: False

Hmm, okay, that's not too bad. At least the keys are recognized.


> 
> I can set these up as hot keys and issue a command, but I have no idea
> what I can set to adjust the hardware volume. But I will also need to
> read out the current volume so I know what value to which is should be
> set. (Same issue as with brightness.)

Do you have dev.acpi_ibm.0.lcd_brightness and .volume?

If you cou can write a script that raises / lowers the values with
sysctl.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-acpi/attachments/20120526/517f1196/attachment.pgp