On Wed, 2007-07-25 at 17:37 -0700, Yinghai Lu wrote: > On 7/25/07, Bjorn Helgaas <[EMAIL PROTECTED]> wrote: > > On Wednesday 25 July 2007 07:32:53 am Sébastien Dugué wrote: > > > On Wed, 25 Jul 2007 07:16:44 -0600 Bjorn Helgaas <[EMAIL PROTECTED]> > > > wrote: > > > > > > > The _DDN is a "DOS device name", and the _UID is a "logical device ID > > > > that does not change across reboots." Both are optional, and PNPACPI > > > > ignores them. But maybe we could change PNPACPI to sort by them if > > > > they are present. I'll think about this a bit. > > > > > > That would be nice, but I wish you good luck with all those > > > crappy BIOSes out there. > > > > Yeah, it's an ugly world we live in. Would you be able to try the > > attached patch just for testing? It should sort devices with the > > same _HID by their _UID. It doesn't have any effect on my systems, > > because my devices are already ordered by _UID by default. But I > > think it should switch your COM1/COM2 ports back to the order you > > expect. > > > > Yinghai, you mentioned the same issue on boxes with multiple root > > bridges. Any chance you could try this out there as well? > > > it doesn't solve pci_root_bus reverse problem. > > is that too late for PNP0A03? > > I wonder if we need to modify acpi_device_register to sort them. The pci root driver is an acpi driver not a pnp driver, so Bjorn's patch will not work. Maybe the ACPI core (ACPICA) should do the sort?
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