I tried 3.18-rc1. I got the same result as with rc3 and rc4: a black screen. But this time, I also noticed a message quickly flashing (lasting only a second or two): "kvm: disabled by bios".
So far, I tried: v3.18-rc1-utopic v3.18-rc2-utopic v3.18-rc3-vivid v3.18-rc4-vivid (I didn't try v3.18-rc2-vivid. Joseph Salisbury directed me to v3.18-rc2-utopic.) Please let me know if there are other versions I should try. (By the way, what I do is install the generic amd64 linux image. For rc1, I downloaded "linux- image-3.18.0-031800rc1-generic_3.18.0-031800rc1.201410192135_amd64.deb", and installed it using Ubuntu Software Centre. That's the procedure I've been following with the other versions as well.) ** 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/1387420 Title: System freezes when performing a backup bash script Status in “linux” package in Ubuntu: Confirmed Bug description: I attached the bash script I use for performing backup. When performing backup, I connect my external hard drive and a flash drive, open a terminal window, and execute the script. Half the time it works without a problem; the other half, the system freezes and I need to restart the computer - but the backup still performs correctly; the freezing seems to happen immediately when it's done. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-37-generic 3.13.0-37.64 ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7 Uname: Linux 3.13.0-37-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: aviv 1511 F.... pulseaudio /dev/snd/controlC0: aviv 1511 F.... pulseaudio CurrentDesktop: Unity Date: Wed Oct 29 18:58:25 2014 HibernationDevice: RESUME=UUID=a41b2680-73ee-49de-a2be-80cbaea2f0df InstallationDate: Installed on 2014-05-28 (154 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: ASUSTeK COMPUTER INC. M51AC ProcEnviron: LANGUAGE=en_CA:en PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_CA.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=0eadde87-8ed5-49d9-afdf-84d4b4ce6d9c ro quiet splash RelatedPackageVersions: linux-restricted-modules-3.13.0-37-generic N/A linux-backports-modules-3.13.0-37-generic N/A linux-firmware 1.127.7 SourcePackage: linux StagingDrivers: rtl8821ae UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/25/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0901 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: M51AC dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0901:bd07/25/2013:svnASUSTeKCOMPUTERINC.:pnM51AC:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnM51AC:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: M51AC dmi.product.version: System Version dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1387420/+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