Christopher, thank you for the helpul directions. I was not aware of the BIOS update. I updated the BIOS, and I also updated <https://help.ubuntu.com/community/BiosUpdate> (the path to the EFI partition was wrong in the initial considerations section, and I added the SONY experience).
> sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date R1044V7 03/24/2014 I will observe if anything has changed and report back. It sometimes take days for the bug to crash the system, depending very much on my usage pattern. I have been living with this bug for about a month. I have tested it (with the old BIOS) against mainline kernels <http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D>. With all v3.17 release candidates up until rc4, the bug was still there, even though my impression is that it triggers less often. Before updating the BIOS today the system had been running with kernel 3.16.2 for four days and had not been tripped (although I am not using the laptop very much these days, so most of the time it was just idling with the mail client running or suspended . Now the system is rebooted with the new BIOS into kernel 3.17-rc4. Thank you again for your help. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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/1368908 Title: [Sony VAIO SVP13215CDB] suspend/resume failure Status in “linux” package in Ubuntu: Confirmed Bug description: System worked well with Xubuntu 13.10. Installed Xubuntu 14.04LTS from scratch. Now the system is unstable. To reproduce: * boot up * close the laptop lid * reopen the lid * try to access files * repeat Usually, after closing the laptop's lid, the system will correctly go to sleep. Sometimes the system is OK after reopening the lid, but eventually and consistently, after a few cycles, reopening the lid turns the screen back on but every command fails. Disks and USB keys give buffer I/O errors, the system is unstable and I am left with no other option than to long-press the power button and lose work. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-35-generic 3.13.0-35.62 ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6 Uname: Linux 3.13.0-35-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: yuv 1970 F.... pulseaudio /dev/snd/controlC1: yuv 1970 F.... pulseaudio CurrentDesktop: XFCE Date: Fri Sep 12 14:41:40 2014 MachineType: Sony Corporation SVP13215CDB ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=81550e22-0f37-4cad-a8b3-d22a8a001a2b ro acpi_osi=Linux acpi_backlight=vendor RelatedPackageVersions: linux-restricted-modules-3.13.0-35-generic N/A linux-backports-modules-3.13.0-35-generic N/A linux-firmware 1.127.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/10/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: R0260V7 dmi.board.asset.tag: N/A dmi.board.name: VAIO dmi.board.vendor: Sony Corporation dmi.board.version: N/A dmi.chassis.asset.tag: N/A dmi.chassis.type: 10 dmi.chassis.vendor: Sony Corporation dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR0260V7:bd05/10/2013:svnSonyCorporation:pnSVP13215CDB:pvrC60BYFSW:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A: dmi.product.name: SVP13215CDB dmi.product.version: C60BYFSW dmi.sys.vendor: Sony Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1368908/+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