If I boot back into kernel version 3.13.0-96, the problem disappears. With the prior kernel version 3.13.0-98 I have the same problem as with version 3.13.0-100 (but I think I just did not notice that this problem also occured with this prior version).
On my desktop machine, which runs the same Ubuntu version 14.04 but configures the network settings with the Network-Manager (instead of the setting "iface eth0 inet6 auto" in "/etc/network/interfaces"), this problem does NOT occur. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1635171 Title: IPv6 Privacy Extensions do not work Status in linux package in Ubuntu: Confirmed Bug description: On my Ubuntu 14.04.5 Server IPv6 Privacy Extensions do not work any more after upgrading to kernel 3.13.0-100-generic, although privacy extensions are enabled in the config: root@Sputnik:~# cat /etc/sysctl.d/10-ipv6-privacy.conf | grep tempaddr net.ipv6.conf.all.use_tempaddr = 2 net.ipv6.conf.default.use_tempaddr = 2 Although the privacy extensions seem to be enabled generally, they are somehow not enabled for my primary network interface eth0: root@Sputnik:~# sysctl -a | grep tempaddr net.ipv6.conf.all.use_tempaddr = 2 net.ipv6.conf.default.use_tempaddr = 2 net.ipv6.conf.eth0.use_tempaddr = 0 net.ipv6.conf.lo.use_tempaddr = -1 net.ipv6.conf.wlan0.use_tempaddr = 2 --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Okt 20 08:48 seq crw-rw---- 1 root audio 116, 33 Okt 20 08:48 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.21 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 14.04 InstallationDate: Installed on 2015-03-21 (579 days ago) InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3) Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 003: ID 8087:07dc Intel Corp. Bus 002 Device 002: ID 0bc2:0503 Seagate RSS LLC ST3250824A [Barracuda 7200.9] Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ��������������������������������� ��������������������������������� Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-100-generic root=UUID=d4ddc9f5-eaaf-4ca1-b289-95e8ea9bb598 ro biosdevname=0 biosdevname=0 ProcVersionSignature: Ubuntu 3.13.0-100.147-generic 3.13.11-ckt39 RelatedPackageVersions: linux-restricted-modules-3.13.0-100-generic N/A linux-backports-modules-3.13.0-100-generic N/A linux-firmware 1.127.22 RfKill: Error: [Errno 2] No such file or directory Tags: trusty Uname: Linux 3.13.0-100-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm _MarkForUpload: True dmi.bios.date: 01/29/2015 dmi.bios.vendor: Intel Corp. dmi.bios.version: FYBYT10H.86A.0048.2015.0129.1411 dmi.board.asset.tag: ��������������������������������� dmi.board.name: DN2820FYK dmi.board.vendor: Intel Corporation dmi.board.version: H24582-204 dmi.chassis.asset.tag: ��������������������������������� dmi.chassis.type: 3 dmi.chassis.vendor: ��������������������������������� dmi.chassis.version: ��������������������������������� dmi.modalias: dmi:bvnIntelCorp.:bvrFYBYT10H.86A.0048.2015.0129.1411:bd01/29/2015:svn:pn:pvr:rvnIntelCorporation:rnDN2820FYK:rvrH24582-204:cvn:ct3:cvr: dmi.product.name: ��������������������������������� dmi.product.version: ��������������������������������� dmi.sys.vendor: ��������������������������������� To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1635171/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp