Re: ACPI hotplug

Hi Keshavamurthy,

The eject files have no any side effect for me.
I just tried to play with them for my devices.

I tried on a docked computer and I have this:
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB7/URTH/UPDK/eject
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB0/URTH/UPDK/eject
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/IDE0/SCND/MSTR/eject
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/PCI1/DOCK/eject
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/LPC/UART/eject
Trying to echo 1 >
/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/PCI1/DOCK/eject
did not undocked the laptop as I hoped.

I thought I can use my docking station without being
necessary to boot docked.
But is not the case.
I tried this way:
Booted normaly, loaded acpiphp (even said found a pci
slot), then plug the ThinkPad in the dockingstation,
but nothing happened. No new devices get added.
Then I tried to boot in the dockingstation and while I
see all the new devices (this was always the case), I
cannot remove the laptop from the docking station
because it does not senses I push the eject button on
it.


Thanks,
Paul

--- Keshavamurthy Anil S

[off-list ref] wrote:

On Thu, Jan 13, 2005 at 03:02:37PM +0100, Paul
Ionescu wrote:

quoted

Hi,

I just read that 2.6.11-rc1 does support ACPI

hotplug.

quoted

What does this really mean ?

2.6.11-rc1 now supports physical CPU hotplug and
these eject files
were added to support the same. Once the cpu's are
logically offlined,
they can be physically removed by echoing 1 onto the
eject file
under _SB/PCI0/LSBX/CPUX/eject.

quoted

I found some new files in /sys/firmware:
find /sys/firmware/ | grep eject

/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB7/URTH/UPDK/eject

quoted

/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/USB0/URTH/UPDK/eject

quoted

/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/IDE0/SCND/MSTR/eject

quoted

/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/LPC/EC/BAT1/eject

quoted

/sys/firmware/acpi/namespace/ACPI/_SB/PCI0/LPC/FDC/FDD0/eject

Looks like your DSDT has _EJx methods for many other
types of devices,
either you can enhance these devices drivers to
support user
mode eject or you can simply not create "eject"
file.

quoted

But what can I do with them, and what else is

there for hotplug ?

quoted

Does it support docking stations ?

Does this "eject" file has any side effects which
needs to be addressed,
please let me know.

-Anil

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