On Mon, Oct 12 2009, Alex Chiang wrote: > > >>> On Mon, Oct 12, 2009 at 02:06:20PM +0200, Jens Axboe wrote: > > >>>> I'm trying to get pci-express hotplug working in a box here. I don't > > >>>> really care about the hotplug aspect, I just want the darn pci-e slots > > >>>> that are designated hotplug slots to actually WORK. When I load pciehp, > > >>>> I get: > > >>>> > > >>>> Firmware did not grant requested _OSC control > > >>>> Firmware did not grant requested _OSC control > > >>>> Firmware did not grant requested _OSC control > > >>>> Firmware did not grant requested _OSC control > > This isn't just a benign message. It means the OS asked to take > over control of the slots and firmware really did say, "nope, > sorry". > > Which means that this: > > > On Mon, Oct 12 2009, Mark Lord wrote: > > > Tried this yet: > > > > > > options pciehp pciehp_force=1 > > Is generally a bad idea. > > Don't do it unless you really know your platform well. Since I had nothing to lose, I tried it. This is what it prints: Firmware did not grant requested _OSC control Firmware did not grant requested _OSC control Firmware did not grant requested _OSC control pciehp 0000:00:05.0:pcie04: Bypassing BIOS check for pciehp use on 0000:00:05.0 pciehp 0000:00:05.0:pcie04: HPC vendor_id 8086 device_id 340c ss_vid 0 ss_did 0 pciehp 0000:00:05.0:pcie04: Power fault on Slot(1) pciehp 0000:00:05.0:pcie04: Power fault bit 0 set and modprobe is continually in msleep() afterwards. > > >> On Mon, Oct 12 2009, Greg KH wrote: > > >>> Can you try the acpiphp driver instead? That's usually the > > >>> driver you want to use for "modern" systems (i.e. anything > > >>> made in the past 5 years.) > > >> > > >> I should have mentioned that I tried that too. It doesn't > > >> complain, but I don't see my cards anywhere afterwards. I'm > > >> a hotplug newbie, do I need to do anything else? > > Can you modprobe acpiphp with debug=1? And send the output? acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:05.0 acpiphp_glue: found ACPI PCI Hotplug slot 1 at PCI 0000:08:00 acpiphp: Slot [1] registered acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:07.0 acpiphp_glue: found ACPI PCI Hotplug slot 2 at PCI 0000:0b:00 acpiphp: Slot [2] registered acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:07.0 acpiphp_glue: found ACPI PCI Hotplug slot 6 at PCI 0000:84:00 acpiphp: Slot [6] registered acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:09.0 acpiphp_glue: found ACPI PCI Hotplug slot 7 at PCI 0000:87:00 acpiphp: Slot [7] registered acpiphp_glue: Bus 0000:87 has 1 slot acpiphp_glue: Bus 0000:84 has 1 slot acpiphp_glue: Bus 0000:0b has 1 slot acpiphp_glue: Bus 0000:08 has 1 slot acpiphp_glue: Total 4 slots -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
