Quantal waits indefinitely for NFS shares during bootup

I have NFS shares defined in /ect/fstab, that mounted without problems in precise. In quantal, now and then during bootup, I get the message "<NFS share> is not ready for mounting yet". Left in that state, bootup waits forever, no matter if the NFS share gets available or not. Pressing "S" for "skip" immediately sobves the problem: Boot process resumes, and the NFS share is present after bootup is finished.

This looks as if the bootup precess does not recognize when the NFS share gets ready. This is a no-go on headless machines, where user interaction is simply impossible, because the user may be miles away. There is nobody to press "S" just to tell quantal to go on.

Instead, the boot process should continue automatically as soon as the NFS shares are available. Currently, it doesn't.

Please fix this so that headless bootup with NFS shares works reliably.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-lowlatency 3.5.0-17.18
ProcVersionSignature: Ubuntu 3.5.0-17.18-lowlatency 3.5.5
Uname: Linux 3.5.0-17-lowlatency i686
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
Date: Mon Oct 29 17:55:54 2012
MarkForUpload: True
SourcePackage: linux-lowlatency
UpgradeStatus: Upgraded to quantal on 2012-10-21 (8 days ago)
---
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ruediger 2564 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
DistroRelease: Ubuntu 12.10
HibernationDevice: RESUME=UUID=d1a3595d-1554-4fe1-a3bb-5bda0053418d
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: exone D156200
MarkForUpload: True
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=/dev/mapper/lvmvg-Root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-17-generic N/A
 linux-backports-modules-3.5.0-17-generic N/A
 linux-firmware 1.95
RfKill:

Tags: quantal
Uname: Linux 3.5.0-17-generic i686
UpgradeStatus: Upgraded to quantal on 2012-10-21 (8 days ago)
UserGroups: adm admin audio cdrom dialout floppy lpadmin plugdev sambashare
dmi.bios.date: 04/23/2004
dmi.bios.vendor: FUJITSU SIEMENS // Phoenix Technologies Ltd.
dmi.bios.version: 4.06 Rev. 1.09.1562
dmi.board.name: D1562
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: S26361-D1562
dmi.chassis.type: 6
dmi.chassis.vendor: exone
dmi.modalias: dmi:bvnFUJITSUSIEMENS//PhoenixTechnologiesLtd.:bvr4.06Rev.1.09.1562:bd04/23/2004:svnexone:pnD156200:pvr:rvnFUJITSUSIEMENS:rnD1562:rvrS26361-D1562:cvnexone:ct6:cvr:
dmi.product.name: D156200
dmi.sys.vendor: exone