(2011/06/06 8:36), Bjorn Helgaas wrote:
On Sun, Jun 5, 2011 at 5:57 AM, Carl Karsten<carl@xxxxxxxxxxxxxxxxx> wrote:
I am wondering why I see a difference between 2 similar setups:
I have 2 laptops, ubuntu 2.6.39-3-generic on both.
pciehp is included, acpiphp built but not inserted by default.
HP EliteBook 8530w (KS051UA#ABA)
HP Pavilion dv6700 Notebook PC (KC300UA#ABA)
On the EliteBook, hotplug works: lspci entries come and go, modules
un/load, udev reports add/remove. good.
On the Pavilion, if I load acpiphp (via /etc/modules), hotplug works.
If I don't load any additional modules hotplug does not work: insert
card - nothing in syslog, lspci, udev. If a card is in the slot when
the kernel loads, it shows in syslog, lscpi and the drivers get
loaded. If I pull it out, nothing changes: still listed in lspci,
modules still loaded, dev nodes still around.
Here is some logs lines from Pavilion:
stock module, doesn't work:
[ 0.560575] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.560605] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
It might be useful to see the entire dmesg log and the "lspci -vv"
output from the Pavilion.
Could you add "pciehp.pciehp_debug" to kernel parameter when getting
dmesg log? With "pciehp.pciehp_debug", pciehp driver will display
debug messages.
Also, could you send "ls -l /sys/bus/pci/slots/" output?
I guess your hotplug slot is not detected by pciehp for some reason.
Regards,
Kenji Kaneshige
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