/run/udev is not writeable

[staho]

During startup I get a message like:
udevd[66]: error: runtime directory '/run/udev' not writable, for now falling back to '/dev/.udev'

Then I have no sound, no touchpad and no keyboard. I can connect USB kbd & mouse, but I have to plug it out and in every time the GDM login appears (Xorg restart?).

$ ls -ld /run/udev
drwxr-xr-x 7 root root 4096 2011-07-09 08:25 /run/udev

lenovo 3000 N200, nvidia

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: udev 171-0ubuntu4
ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5
Uname: Linux 3.0-3-generic i686
Architecture: i386
Date: Mon Jul 11 22:37:00 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: LENOVO 0769K2G
ProcEnviron:
 LANGUAGE=pl_PL:pl:en
 PATH=(custom, user)
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0-3-generic root=UUID=55be7819-14c8-431b-beb7-fd7bce603b01 ro quiet
SourcePackage: udev
UdevDb: Error: [Errno 2] Nie ma takiego pliku ani katalogu
UpgradeStatus: Upgraded to oneiric on 2011-07-09 (2 days ago)
dmi.bios.date: 01/03/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 68ET32WW
dmi.board.name: IEL10
dmi.board.vendor: LENOVO
dmi.board.version: REFERENCE
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr68ET32WW:bd01/03/2008:svnLENOVO:pn0769K2G:pvr3000N200:rvnLENOVO:rnIEL10:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: 0769K2G
dmi.product.version: 3000 N200
dmi.sys.vendor: LENOVO

[Jean-Baptiste Lallement (jibel)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 807306, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.