Embedded controller problems

Embedded controller problems

[Jorgen Bodde]

Hi List,

I own an Acer Travelmate 4001WMLi, and after getting the battery readout 
fixed under linux by patching my DSDT file and appending it to initrd, I 
am suffering from missing keys.

Now, this phenomenon is not new to me, I knew my laptop has this under 
Windows as well. I have been trying to minimize this problem to no avail.

It just happens that every 20 characters or so, I miss out on one or 
two,. Very annoying when typing a password, and especially when SETTING 
passwords.

I have read it had to do with the embedded controller and lost 
interrupts when the battery status is polled. I also read somewhere the 
polling interval is rediculously high (every 1 second) when windows 
polls this with a less interval which can be the reason the missing keys 
are less frequent under windows.

Is there a way to lower the polling interval of the battery, or even 
better, fix this problem? My system info:

Suse 9.3
Kernel 2.6.11
Acter travelmate 4001WMLi
Panasonic battery

Any help is very much appreciated as I really would like to use Linux, 
but the missing keys make it hard to enjoy using it :-(

Regards,
- Jorgen


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Re: Embedded controller problems

[Olaf Jansen-Olliges]

Hi Jorgen, 

> I own an Acer Travelmate 4001WMLi, and after getting the battery readout
> fixed under linux by patching my DSDT file and appending it to initrd, I
> am suffering from missing keys.

I've an ACER Extensa 3002WLMI which is said to be the same machine. With the 
information from 

- https://sourceforge.net/projects/sbs-linux/

especially the "acpi-ec-nospinlock" Patch I have no problems with missing 
keys. Without the patch i've had the same problems. 

You should also read this:

https://sourceforge.net/tracker/index.php?func=detail&aid=1191536&group_id=129330&atid=714494

If you need more Information please let me know.

Regards
	Olaf

BTW: have you got suspend to disk / ram working on your machine?


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Re: Embedded controller problems

[Jorgen Bodde]

Thanks Olaf and Oisin!

I had applied the spinlock patch before, but I also had a black screen 
and thought the kernel simply froze and became useless. After reading it 
could take up to 5 minutes to continue, I adjusted the patch as 
described in the sourceforge bug tracker, and low and behold! I have 
typed about 300 characters after achother without a single key missing! 
By tonight I will try to stress the system some more to see if this 
indeed did the trick and removed the key problem totally!

score 1:0 for Linux over Windows ;-) It rocks that you can change it 
yourself to make it working!

Regards,
- Jorgen

Olaf Jansen-Olliges wrote:
> Hi Jorgen, 
> 
> 
>>I own an Acer Travelmate 4001WMLi, and after getting the battery readout
>>fixed under linux by patching my DSDT file and appending it to initrd, I
>>am suffering from missing keys.
> 
> 
> I've an ACER Extensa 3002WLMI which is said to be the same machine. With the 
> information from 
> 
> - https://sourceforge.net/projects/sbs-linux/
> 
> especially the "acpi-ec-nospinlock" Patch I have no problems with missing 
> keys. Without the patch i've had the same problems. 
> 
> You should also read this:
> 
> https://sourceforge.net/tracker/index.php?func=detail&aid=1191536&group_id=129330&atid=714494
> 
> If you need more Information please let me know.
> 
> Regards
> 	Olaf
> 
> BTW: have you got suspend to disk / ram working on your machine?
> 
> 
> -------------------------------------------------------
> SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
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> _______________________________________________
> Acpi-devel mailing list
> Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/acpi-devel
> 
> 


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Re: Embedded controller problems

[Olaf Jansen-Olliges]

Hi Jorgen, 

> Thanks Olaf and Oisin!

no matter - but I think most work was done by Rich Townsend. 

> score 1:0 for Linux over Windows ;-) It rocks that you can change it
> yourself to make it working!

because of this I use Linux on nearly all my machines. The only exception is a 
Mac Mini in the living room which acts as a MYTHTV-frontend and video 
recorder. But no scores possible for Windows ;-)

regards
	Olaf


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Re: Embedded controller problems

[Oisín Mac Fhearaí]

On Friday 15 July 2005 14:23, Olaf Jansen-Olliges wrote:
> no matter - but I think most work was done by Rich Townsend.
I think Yu Luming wrote that spinlock/semaphore patch actually - Rich Townsend 
did some great work on smart batteries (ie: getting them supported at all!) 
and cheered up a lot of people.

> because of this I use Linux on nearly all my machines.
Yep, things just keep getting better!

Oisín


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