On Mon 13. Nov - 12:14:37, Matthew Garrett wrote: > On Sun, Nov 12, 2006 at 03:07:37PM +0100, Holger Macht wrote: > > > I'm currently looking at docking station support for various > > laptops/vendors and what can be done to get them working. At the moment, > > userspace has to do some quirks to get support for them. For instance, > > when docking an X60 into a docking station where a SATA DVD drive is > > located, userland has to rescan the scsi host for the drive to show up. > > Does the docking not generate a bus rescan event on the SATA bus? If it Maybe it does, I'll have to recheck. > does, it's just a special case of ACPI drive hotplugging. You can't do > it reliably from userspace, but I think Kirsten has been looking at > doing it properly in the kernel. What I'm doing at the moment (for about a week ;-) is to echo "- - -" to /sys/class/scsi_host/host*/scan for all unoccupied hosts on a dock event. And this works pretty good. But it's of course only a workaround if the scsi bus generates an event. > > > Additionally, currently the dock driver automatically executes the _DCK > > method when it detects a dock/undock event. Wouldn't it be good to have > > common sysfs interface for docking so that userland can trigger the > > dock/undock? This way userland would also be able to do 'something before' > > docking/undocking, such as unregistering a device, showing a poput that it > > is now save to physically undock, etc. With recent kernel I have to unregister from the drive from userspace to prevent confusion about if the drive is still there or not. > When the dock contains a drive, I think there's possibly an argument in > favour of this. Otherwise, the hardware should be able to deal with it - > every ACPI-based dock I've played with has had some indication to inform > the user that the device has disconnected. Yes, this one has such an indicator, too. I just thought notifying userspace could be helpful for other cases, that's why I'm asking for comments. Thanks, Holger - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
