I fixed this problem by adding a delay of 1 second at the beginning of
the function pci_do_scan_bus(struct pci_bus *bus) in
drivers/pci/probe.c.
I added these lines:
----------------------------------------------------------------
int wait1,wait2,dummy;
dummy=0;
printk("PCI-Gam: Wait 1 second\n");
for (wait1=0;wait1!=1000000;wait1++)
for (wait2=0;wait2!=6000;wait2++)
dummy = 123456-dummy;
printk("PCI-Gam: Start scanning bus\n");
-----------------------------------------------------------------
Now when the PCI driver scans the root bus (after the small delay), it
finds the three USB hubs correctly.
At last I can use my keyboard !
--
3 usb hubs disappeared from lspci
https://launchpad.net/bugs/68639
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