Re: APM problem after 2.6.13.5

[Alessio Sangalli <alesan@manoweb.com>]

Pekka Enberg wrote:
> Hi Alessio,
> 
> On 6/16/06, Alessio Sangalli <alesan@manoweb.com> wrote:
>>>> if I enable "APM support" I get a freeze at the very beginning of the
>>>> boot, without any explicit erro message, just after the PCI stuff. If
>>>> you need a transcript of the messages at boot, let me know, I will have
>>>> to write them by hand).
>>>> 2.6.13.5 is ok. I need APM support to let the "Fn" key and the battery
>>>> meter work!
> 
> Pekka Enberg wrote:
>>> There's a lot of changes between 2.6.13 and 2.6.14.  It would be
>>> helpful if you could narrow down the exact changeset that broke your
> 
> On 6/16/06, Alessio Sangalli <alesan@manoweb.com> wrote:
>> done:
>>
>> 4196c3af25d98204216a5d6c37ad2cb303a1f2bf is first bad commit
>> diff-tree 4196c3af25d98204216a5d6c37ad2cb303a1f2bf (from
>> 9092b20803e4b3b3a480592794a73030f17370b3)
>> Author: Linus Torvalds <torvalds@g5.osdl.org>
>> Date:   Sun Oct 23 16:31:16 2005 -0700
>>
>>     cardbus: limit IO windows to 256 bytes
>>
>>     That's what we've always historically done, and bigger windows seem to
>>     confuse some cardbus bridges. Or something.
>>
>>     Alan reports that this makes the ThinkPad 600x series work properly
>>     again: the 4kB IO window for some reason made IDE DMA not work, which
>>     makes IDE painfully slow even if it works after DMA timeouts.
>>
>>     Signed-off-by: Linus Torvalds <torvalds@osdl.org>
>>
>> :040000 040000 629d4d303048bffa610017e81e0e744bae08660d
>> 33e154ffe96822d09f37ae2d433de5152216501b M      drivers
>>
>>
>> let me know any other test I should do to help find a solution to this
>> problem, thank you!
> 
> So reverting the above commit from git head makes your box boot again?
> Linus, any thoughts?


Yes, exactly. I can run 2.6.17-rc6 with only that commit reverted.

The mahcine is a notebook COMPAQ Presario 800 Model 80XL4
Pentium3@700MHz 256MB ram etc

Thank you
ciao
Alessio Sangalli