[Buildroot] Buildroot 2011.11 on x86_64 - neither udev nor mdev loads needed modules at startup

[Wojciech Zabolotny]

Hi,

I compiled the buildroot-2011.11 for x86_64 platform. Unfortunately
after the startup the device drivers are not loaded. I've tried to use
both mdev and udev, and results are the same.
I have the following settings in the kernel configuration:
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y

When I load the drivers manually:
eg. (on qemu-system-x86_64):
#modprobe e1000
#modprobe uhci_hcd

the NIC and the USB device (passed by -usbdevice host:0xabcd:0xcdef)
are recognized correctly.
The syptoms were the same on the real hardware (E350M1 board) which
currently not available to me.

I attach my buildroot configuration and my kernel configuration
together with /var/log/messages from the emulated machine.

The "mount" command returns the following:
rootfs on / type rootfs (rw,relatime)
devtmpfs on /dev type devtmpfs
(rw,relatime,size=998680k,nr_inodes=249670,mode=755)
proc on /proc type proc (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /dev/shm type tmpfs (rw,relatime,mode=777)
tmpfs on /tmp type tmpfs (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)

The udevd is running (what's interesting, after I run "#modprobe
e1000", there are even two udevd processes running both as
"/sbin/udevd -d").

Is it a problem with this release of buildroot, or have I something
misconfigured?
-- 
TIA & Merry Christmas!
WZab
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