I downloaded and install recent kernel as requested in comment 3. This made no difference. Computer would not finish booting. Booting through recovery mode per initail report works just fine.
don@PC-001:~$ uname -a Linux PC-001 3.13.11-03131109-generic #201410141735 SMP Tue Oct 14 21:56:21 UTC 2014 i686 i686 i686 GNU/Linux I then updated bios from 2.2.0 to 2.6.6 (Thanks Christopher). This also made no difference. don@PC-001:~$ sudo dmidecode -s bios-version [sudo] password for don: 2.6.6 I do not know how to add (or modify) tags so have not added 'kernel-bug- exists-upstream' (per comment 3) or changed the 'bios-outdated-2.6.6' tag. ** 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/1383968 Title: Booting Dell Optiplex only works if first boot into safe mode. Status in “linux” package in Ubuntu: Confirmed Bug description: When booting into a Dell Optiplex 745, it will hang (blank screen). It will, however boot fine if I select the 'advanced option for Ubuntu' from the boot loader and boot into 'recovery mode.' Once booted into 'recovery mode', selecting the 'resume normal boot' works just fine. I have this same issue with the 3 different Dell Optiplex computers so this is not hardware on just one computer. The previous version of Ubuntu (13.10) worked fine with the same hardware. It was only after the system update to 14.04 that this began to happen. Ubuntu 14.04 with Linux 3.13.0-36-generic 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 i686 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: don 11927 F.... pulseaudio CurrentDesktop: Unity Date: Tue Oct 21 21:10:15 2014 HibernationDevice: RESUME=UUID=80165795-563a-48b3-b3bc-c4482c158111 InstallationDate: Installed on 2012-10-15 (736 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) IwConfig: lo no wireless extensions. eth2 no wireless extensions. MachineType: Dell Inc. OptiPlex 745 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=23ca1a32-0fbe-4785-a8fb-ca7b6c8ff4ef ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-35-generic N/A linux-backports-modules-3.13.0-35-generic N/A linux-firmware 1.127.7 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-04-25 (179 days ago) WifiSyslog: dmi.bios.date: 03/29/2007 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.2.0 dmi.board.name: 0MM599 dmi.board.vendor: Dell Inc. dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.2.0:bd03/29/2007:svnDellInc.:pnOptiPlex745:pvr:rvnDellInc.:rn0MM599:rvr:cvnDellInc.:ct3:cvr: dmi.product.name: OptiPlex 745 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383968/+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