Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino notebook

Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino notebook

[Georg C F Greve]

 > I should clarify that this does not happen on *all* Centrino
 > notebooks (and not the ones I've tried), only some.

Do you still remember which notebooks you did _not_ encounter these
problems with? More particularly which chipsets they had? I've seen so
many reports for this problem that it would be interesting to know
where it does _not_ exist.

The number of notebooks with that problem seems considerable -- people
reported these problems on different Centrino notebooks from different
vendors, particularly

 ASUS M and S series
 ACER TravelMate
 IBM Thinkpad R50P

that all seemed to have precisely one thing in common: the Intel 855GM
centrino chipset.

Similar problems have also been reported from Fujitsu-Siemens e6624
notebook, which has an intel i830 chipset. As the kernel 2.6 currently
seems to use the i830 AGP driver for the Intel 855GM chipset, those
two might (or might not) be related.

That we have not seen more reports is probably because people are
still mostly using 2.4.x on their notebooks, which was better for
suspend/resume (I'm using a patched 2.4.24 as I'm writing this).

Regards,
Georg

Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino notebook

[Ari Pollak]

The Thinkpad T40 and T41 at least; they suspend & resume properly, but 
there are still interrupt-losing problems when resuming, which is a 
totally separate issue. I believe they both use the 8255PM chipset:

00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O Controller 
(rev 03)

There have been a few discussions on the ACPI list about this, as well 
as bugs 1661 and 1409.

Georg C F Greve wrote:
> Do you still remember which notebooks you did _not_ encounter these
> problems with? More particularly which chipsets they had? I've seen so
> many reports for this problem that it would be interesting to know
> where it does _not_ exist.
> 
> The number of notebooks with that problem seems considerable -- people
> reported these problems on different Centrino notebooks from different
> vendors, particularly
> 
>  ASUS M and S series
>  ACER TravelMate
>  IBM Thinkpad R50P
> 
> that all seemed to have precisely one thing in common: the Intel 855GM
> centrino chipset.
> 
> Similar problems have also been reported from Fujitsu-Siemens e6624
> notebook, which has an intel i830 chipset. As the kernel 2.6 currently
> seems to use the i830 AGP driver for the Intel 855GM chipset, those
> two might (or might not) be related.
> 
> That we have not seen more reports is probably because people are
> still mostly using 2.4.x on their notebooks, which was better for
> suspend/resume (I'm using a patched 2.4.24 as I'm writing this).
> 
> Regards,
> Georg

Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino notebook

[Georg C F Greve]

 > The Thinkpad T40 and T41 at least; they suspend & resume properly,
 > but there are still interrupt-losing problems when resuming, which
 > is a totally separate issue. I believe they both use the 8255PM
 > chipset:

 > 00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O
 > Controller (rev 03)

Thanks.

AFAIK, there are essentially three "Centrino" chipsets
       Intel 855GM [1]
       Intel 855PM [2]
       Intel 855GME [3].

So 855PM based laptops seem to work, whereas 855GM based laptops
apparently don't. So it would be logical to assume it is the
difference between these two that causes the problems.

Unfortunately I'm not sure whether that brings us any further as it
seems that it is the integrated graphics stuff that makes the
difference -- or is there more?

Regards,
Georg


[1] http://www.intel.com/design/chipsets/mobile/855gm.htm?iid=dev_chips855fam+855gm&
[2] http://www.intel.com/design/chipsets/mobile/855pm.htm?iid=dev_chips855fam+855pm&
[3] http://www.intel.com/design/chipsets/mobile/855GME.htm?iid=dev_chips855fam+855gme&

Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino notebook

[Matthias Hentges]

Am So, den 08.02.2004 schrieb Georg C F Greve um 19:32:
>  > The Thinkpad T40 and T41 at least; they suspend & resume properly,
>  > but there are still interrupt-losing problems when resuming, which
>  > is a totally separate issue. I believe they both use the 8255PM
>  > chipset:
> 
>  > 00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O
>  > Controller (rev 03)
> 
> Thanks.
> 
> AFAIK, there are essentially three "Centrino" chipsets
>        Intel 855GM [1]
>        Intel 855PM [2]
>        Intel 855GME [3].
> 
> So 855PM based laptops seem to work, whereas 855GM based laptops
> apparently don't. So it would be logical to assume it is the
> difference between these two that causes the problems.

*cough*

Well my laptop uses the 855PM chipset and it does *not* work. Suspend
works but the machine won't wake up (drives power up but the screen
stays blank and the machine is not pingable.

PS: Yes, my mailer is kinda fscked ATM, sorry
-- 
Matthias Hentges 
Cologne / Germany

[www.hentges.net] -> PGP welcome, HTML tolerated
ICQ: 97 26 97 4   -> No files, no URL's

My OS: Debian Woody. Geek by Nature, Linux by Choice

Re: [PROBLEM] 2.6.3-rc1: still no suspend/resume on Centrino

[Georg C. F. Greve]

 > Well my laptop uses the 855PM chipset and it does *not*
 > work. Suspend works but the machine won't wake up (drives power up
 > but the screen stays blank and the machine is not pingable.

Thanks for pointing that out, it sounds a lot like the problem
description of the 855GM machines.

So according to the data posted on the net/in the lists, the status of
kernel 2.6.x advanced power management (suspend/resume) on Centrino
notebooks depending on the chipset currently looks like

 Intel 855GM:  no success story so far

 Intel 855PM:  a few successes reported, definitely not true for all

 Intel 855GME: ??? (no data)

Regards,
Georg


P.S. I'm curious: I know some Intel employees are working on the Linux
ACPI code, is this merely tolerated or officially during paid time?
Are you given any preferences what to work on or are you entirely free
in your prioritizing?

-- 
Georg C. F. Greve                                       <greve@gnu.org>
Free Software Foundation Europe	                 (http://fsfeurope.org)
Brave GNU World	                           (http://brave-gnu-world.org)