Status of ACPI on IBM T40p

Status of ACPI on IBM T40p

[Alexander Gran]

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Hi,

I just gave ACPI an other try this night. This are my results:
I used linux-2.6.2-rc3-mm1 on a T40p 2373-G1G.
Config: http://zodiac.dnsalias.org/misc/262-rc3-mm1.acpi.config
Errors: http://zodiac.dnsalias.org/misc/syslog.acpi
lspci -v (on APM kernel): http://zodiac.dnsalias.org/misc/lspci

Booting is ok. All ACPI modules load without warning, only the relaxed AML 
seems to be needed.
What's working:
Battery monitoring, thermal monitoring, ac-adapter, lid-button are all ok.
The sound-system survives a suspend. Great.
laptop_mode is in this kernel, finally. Cool, Andrew!
Fan isn't recognized. Power-button is recognized, but gives no events.
C-states are not working right:
The CPU has C0-C3. C0 is full speed, the rest is slower. According to the ACPI 
documentation the CPU should switch automagically to the slower modes after 
some time of inactivaty. However it cannot controll busmaster PCI transfers 
in C3. Now some driver doesn't gets busmaster right, and due to this, the cpu 
never go's to C3 [Hope I got this right, I am no acpi master..](my went to C3 
after some fiddeling with suspend (see later) and the PCI-Bus crashed, hence 
I know. If my CPU uses C3, laptop_mode and backlight  mostly dimmed, I 
reached 5h+ :)
Other things that don't work:
When suspending, the USB-drivers don't get it right, and do not work after 
resuming. Unloading them before suspending and loading them afterwards 
doesn't help either. Additionally there seems to be issues with the PCI bus. 
I got random errors (everything between kernel-oops, error-loops and 
warnings) when reinserting the uhci_hcd module.
After resuming my power LED is not switched on (not so problematic), and the  
notebook doesn't ask for a password (Really problematic).
The e1000 module still needs the unload/load procedure.

Hope I'm right on this list. Tell me If I'd cc to an other one, please.
Include my in your cc's please, as I'm not reading this list.

regards
Alex

- -- 
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Re: Status of ACPI on IBM T40p

[Ari Pollak]

Interesting, I have the exact opposite problem. According to the power 
states:

active state:            C2
default state:           C1
bus master activity:     02000008
states:
     C1:                  promotion[C2] demotion[--] latency[000] 
usage[00000010]
*C2:                  promotion[C3] demotion[C1] latency[001] 
usage[01048795]
C3:                  promotion[--] demotion[C2] latency[085] usage[01977750]

As you can see, my Thinkpad T41 rarely goes higher than C2, even when a 
program is using 100% or compiling or something along those lines.


> The CPU has C0-C3. C0 is full speed, the rest is slower. According to the ACPI 
> documentation the CPU should switch automagically to the slower modes after 
> some time of inactivaty. However it cannot controll busmaster PCI transfers 
> in C3. Now some driver doesn't gets busmaster right, and due to this, the cpu 
> never go's to C3 [Hope I got this right, I am no acpi master..](my went to C3 
> after some fiddeling with suspend (see later) and the PCI-Bus crashed, hence 
> I know. If my CPU uses C3, laptop_mode and backlight  mostly dimmed, I 
> reached 5h+ :)



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Re: Re: Status of ACPI on IBM T40p

[Bruno Ducrot]

On Fri, Feb 06, 2004 at 07:35:50PM -0500, Ari Pollak wrote:
> Interesting, I have the exact opposite problem. According to the power 
> states:
> 
> active state:            C2
> default state:           C1
> bus master activity:     02000008
> states:
>     C1:                  promotion[C2] demotion[--] latency[000] 
> usage[00000010]
> *C2:                  promotion[C3] demotion[C1] latency[001] 
> usage[01048795]
> C3:                  promotion[--] demotion[C2] latency[085] usage[01977750]
> 
> As you can see, my Thinkpad T41 rarely goes higher than C2, even when a 
> program is using 100% or compiling or something along those lines.

Could you send me the output of acpidmp, please ?

wget ftp://ftp.kernel.org//pub/linux/kernel/people/lenb/acpi/utils/pmtools-20031210.tar.bz2
tar xjvfp pmtools-20031210.tar.bz2
cd pmtools-20031210/acpidmp
make
sudo ./acpidmp > acpidmp.out
bzip2 acpidmp.out 

Then mail me the acpidmp.out.bz2

Cheers,

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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Re: Re: Status of ACPI on IBM T40p

[Pavel Machek]

Hi!

> active state:            C2
> default state:           C1
> bus master activity:     02000008
> states:
>     C1:                  promotion[C2] demotion[--] latency[000] 
> usage[00000010]
> *C2:                  promotion[C3] demotion[C1] latency[001] 
> usage[01048795]
> C3:                  promotion[--] demotion[C2] latency[085] 
> usage[01977750]
> 
> As you can see, my Thinkpad T41 rarely goes higher than C2, even when 
> a program is using 100% or compiling or something along those lines.

That's okay: if your C2 takes 1usec to enter, there's little point in using C1.
So during compilation you are using C0 and C2. Seems ok.
				Pavel
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RE: Status of ACPI on IBM T40p

[Li, Shaohua]

Hi,

> Fan isn't recognized. 
ACPI can't control fan in many IBM systems, including R40, T40. I guess
it's the same situation in your T40p.

>Power-button is recognized, but gives no events.
That's interesting; would you please give some detail info? Did it work
before? I didn't see the error in T40.

> C-states are not working right:
> The CPU has C0-C3. C0 is full speed, the rest is slower. According to
the
> ACPI
> documentation the CPU should switch automagically to the slower modes
> after
> some time of inactivaty. However it cannot controll busmaster PCI
> transfers
> in C3. Now some driver doesn't gets busmaster right, and due to this,
the
> cpu
> never go's to C3 [Hope I got this right, I am no acpi master..](my
went to
> C3
> after some fiddeling with suspend (see later) and the PCI-Bus crashed,
> hence
> I know. If my CPU uses C3, laptop_mode and backlight  mostly dimmed, I
> reached 5h+ :)
we have discussed the problem before. USB caused bus master activities.
without USB devices, my T40 can enter C3

> Other things that don't work:
> When suspending, the USB-drivers don't get it right, and do not work
after
> resuming. Unloading them before suspending and loading them afterwards
> doesn't help either. Additionally there seems to be issues with the
PCI
> bus.
> I got random errors (everything between kernel-oops, error-loops and
> warnings) when reinserting the uhci_hcd module.
I got the same error in T40. If I didn't include USB module, it went
away. So I'm not sure if it's an ACPI error.

> After resuming my power LED is not switched on (not so problematic),
and
> the
> notebook doesn't ask for a password (Really problematic).
Actually LED is not on after resuming in windows under T40, so in my
point of view, it's not severe.

> The e1000 module still needs the unload/load procedure.
> 
> Hope I'm right on this list. Tell me If I'd cc to an other one,
please.
> Include my in your cc's please, as I'm not reading this list.
> 
> regards
> Alex
> 
> - --
> Some operating systems are called `user friendly',
> 	Linux however is `expert friendly'.
> Encrypted Mails welcome.
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RE: Status of ACPI on IBM T40p

[Ow Mun Heng]

[-- Attachment #1: Type: text/plain, Size: 589 bytes --]



> -----Original Message-----
> From: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> [mailto:acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org]On Behalf Of 
> Li, Shaohua

> > Alexander Gran Wrote
> > C-states are not working right:
> without USB devices, my T40 can enter C3

can you tell me how to remove usb so that my Laptop can get into C3? 
It keeps being in C2 and usage of C3 is [000000000]

bus master activity = fffffffff all the time..

I tried removing all the usb references but can remove usbcore..

:( Help please.

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Re: Status of ACPI on IBM T40p

[Bruno Ducrot]

On Fri, Feb 06, 2004 at 11:12:53AM +0800, Ow Mun Heng wrote:
> 
> 
> > -----Original Message-----
> > From: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > [mailto:acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org]On Behalf Of 
> > Li, Shaohua
> 
> > > Alexander Gran Wrote
> > > C-states are not working right:
> > without USB devices, my T40 can enter C3
> 
> can you tell me how to remove usb so that my Laptop can get into C3? 
> It keeps being in C2 and usage of C3 is [000000000]
> 
> bus master activity = fffffffff all the time..
> 

Recompiling kernel without any kind of usb things, even modules perhap ?

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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Re: Status of ACPI on IBM T40p

[Alexander Gran]

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Am Freitag, 6. Februar 2004 21:17 schrieb Bruno Ducrot:
> > > without USB devices, my T40 can enter C3
> >
> > can you tell me how to remove usb so that my Laptop can get into C3?
> > It keeps being in C2 and usage of C3 is [000000000]
> >
> > bus master activity = fffffffff all the time..
>
> Recompiling kernel without any kind of usb things, even modules perhap ?

Wich results in a highly usable kernel....:)

Alex

- -- 
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RE: Status of ACPI on IBM T40p

[Ow Mun Heng]

> -----Original Message-----
> From: Bruno Ducrot [mailto:ducrot-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org]
> Sent: Saturday, February 07, 2004 4:17 AM
> To: Ow Mun Heng
> Cc: Li, Shaohua; Alexander Gran; acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> Subject: Re: [ACPI] Status of ACPI on IBM T40p
> 
> 
> On Fri, Feb 06, 2004 at 11:12:53AM +0800, Ow Mun Heng wrote:
> > 
> > 
> > > -----Original Message-----
> > > From: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > > [mailto:acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org]On Behalf Of 
> > > Li, Shaohua
> > 
> > > > Alexander Gran Wrote
> > > > C-states are not working right:
> > > without USB devices, my T40 can enter C3
> > 
> > can you tell me how to remove usb so that my Laptop can get 
> into C3? 
> > It keeps being in C2 and usage of C3 is [000000000]
> > 
> > bus master activity = fffffffff all the time..
> > 
> 
> Recompiling kernel without any kind of usb things, even 
> modules perhap ?


Hmm.. that might just be a swell idea. I'll definately try it
out since When I'm on batt power, I can just boot into that 
non-usb kernel and to a usb-aware kernel when I'm on AC-Power
at home!!

Cool


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RE: Status of ACPI on IBM T40p

[Ow Mun Heng]

> -----Original Message-----
> From: Alexander Gran [mailto:alex-4mRm4CWMOdkHuPwBo6/EyUB+6BGkLq7r@public.gmane.org]
> 
> Am Freitag, 6. Februar 2004 21:17 schrieb Bruno Ducrot:
> > > > without USB devices, my T40 can enter C3
> > >
> > > can you tell me how to remove usb so that my Laptop can 
> get into C3?
> > > It keeps being in C2 and usage of C3 is [000000000]
> > >
> > > bus master activity = fffffffff all the time..
> >
> > Recompiling kernel without any kind of usb things, even 
> modules perhap ?
> 
> Wich results in a highly usable kernel....:)

Alex,
	Can you tell me what you meant from your comment? Did you
try it out already? Good results?

I want to try it on my D600.
 


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Re: Status of ACPI on IBM T40p

[Bruno Ducrot]

On Mon, Feb 09, 2004 at 11:16:01AM +0100, Alexander Gran wrote:
> Am Montag, 9. Februar 2004 04:12 schrieb Ow Mun Heng:
> > > > Recompiling kernel without any kind of usb things, even
> > > > modules perhap ?
> > >
> > > Wich results in a highly usable kernel....:)
> >
> > Alex,
> > 	Can you tell me what you meant from your comment? Did you
> > try it out already? Good results?
> 
> Well, if you disable USB (and don't use any other driver that permanentely 
> requires busmaster, I don't know any, though), you will get C3, at the cost 
> of USB, of course. At least my T40 needs USB for virtually anything 
> (especially mouse and keyboard) as it has only usb and LPT.
> So I virtually cannot disbale USB. Hoping that someone will fix the 
> USB-drivers sometime..
> 

Well, the problem is a usb problem, definitely not a ACPI one, it should
be better to ping them, not acpi developpers, who are anyway aware of
that for a long time now.

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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