I've got the same problem with at least 13.04 and now with 13.10. I've noticed, that the gnome-screensaver deamon wasn't running after a fresh login. Once the deamon is running, locking after suspend is working again.
I didn't figure out, why this deamon isn't running. However my simple workaround: just add the gnome-screensaver to the session startup list (gnome-session-properties). -- 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/1083030 Title: Ubuntu >= 12.04 resumes from Suspend without password prompt Status in “linux” package in Ubuntu: Expired Bug description: in Ubuntu 12.04 (running unity 2d if that means anything), I put my computer to sleep. Upon resuming, it did not ask for my password, leaving my workstation vulnerable to anyone who accidentally hit the keyboard to wake it up. I checked the settings, they said explicitly "Require my password when waking from suspend" was active. I unchecked this setting and checked it again, no improvement. $ cat /proc/version_signature Ubuntu 3.2.0-33.52-generic 3.2.31 There's a "Lock [ ON | OFF ]" button in the same dialog, which also has no effect on the desired feature whether on or off. --- ApportVersion: 2.7-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: fnnaji 3667 F.... pulseaudio /dev/snd/pcmC0D0p: fnnaji 3667 F...m pulseaudio CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 13.04 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=949258aa-9248-4dc3-8de6-685a942981e1 InstallationDate: Installed on 2012-10-20 (51 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Hewlett-Packard HP Compaq 8100 Elite CMT PC MarkForUpload: True NonfreeKernelModules: nvidia Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-5-generic root=UUID=b6bb5205-cb7b-481b-b9d1-48ac47a08b27 ro drm.debug=0xe plymouth:debug ProcVersionSignature: Ubuntu 3.7.0-5.13-generic 3.7.0-rc8 RelatedPackageVersions: linux-restricted-modules-3.7.0-5-generic N/A linux-backports-modules-3.7.0-5-generic N/A linux-firmware 1.98 RfKill: Tags: raring Uname: Linux 3.7.0-5-generic x86_64 UpgradeStatus: Upgraded to raring on 2012-12-09 (1 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 06/09/2010 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 786H1 v01.05 dmi.board.asset.tag: CZC1102PLN dmi.board.name: 304Bh dmi.board.vendor: Hewlett-Packard dmi.chassis.asset.tag: CZC1102PLN dmi.chassis.type: 6 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr786H1v01.05:bd06/09/2010:svnHewlett-Packard:pnHPCompaq8100EliteCMTPC:pvr:rvnHewlett-Packard:rn304Bh:rvr:cvnHewlett-Packard:ct6:cvr: dmi.product.name: HP Compaq 8100 Elite CMT PC dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1083030/+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