[Buildroot] /run/udev missing ?

On Sun, 2011-08-14 at 08:43 +0200, Peter Korsgaard wrote:

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"Sven" == Sven Neumann [off-list ref] writes:

 Sven> Hi,
 Sven> after updating to latest buildroot, udevd has problems starting:

 Sven> udevd[1114]: error: runtime directory '/run/udev' not writable, for now
 Sven> falling back to '/dev/.udev'
 Sven> udevd[1114]: failed to create queue file: No such file or directory
 Sven> udevd[1114]: error creating queue file

 Sven> It looks like udevd is not running or not working properly then as it
 Sven> fails to load the firmware for the Wifi chip.

 Sven> This is a configuration with static device management.

All other configurations than static dev (devtmpfs/mdev/udev) expects
CONFIG_DEVTMPFS_MOUNT to be enabled in the kernel, not a static /dev.

Do you have a suggestion on how to use udev with a kernel that does not
yet have this option? We are stuck with 2.6.31 on one of our platforms
and I haven't been able to get udev working with recent buildroot on
this platform.


Sven