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Date: Thu, 27 Aug 2009 09:18:17 -0400
From: Mark Lord <lkml@rtr.ca>
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To: Mike Mohr <akihana@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: expresscard hotplug not working
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Mark Lord wrote:
> Mike Mohr wrote:
>> Hi,
>>
>> I think I'm having a similar problem to the fellow listed here:
>>
>> http://kerneltrap.org/mailarchive/linux-kernel/2007/10/16/344543
>>
>> The only difference is that no card will work at all unless it is
>> inserted before system power is turned on.  If the card is removed
>> while the system is running it stops working and will never return to
>> life unless the system is rebooted with the card in the slot.
> ..
> 
> It's probably the b0rked PCIe hotplug support.
> The driver is way too strict about things at times,
> and as a result it doesn't work "out of the box" on
> a huge number of Dell notebooks (and possibly others).
> 
> Just create a file called /etc/modprobe.d/pciehp,
> and stick this one line into it:
> 
>   options pciehp pciehp_force=1
> 
> See if that works.
..

Oh, one other thing is also needed:
    add a line for pciehp to /etc/modules
    to ensure the driver gets loaded at boot time.

Cheers