Hello Joseph, Thanks for responding.
Sadly it didn't work either first up. Its very strange because once I go through initial hiccups it boots normally on the latest (and previous - 3.19.0-23-generic) kernels. What is even more crazy (and I'm loath to even say this because it sounds so idiotic) is that it appears to only happen from a completely cold start - as in switch on at the wall switch. These are the steps:- 1. Switch on at wall power (note this also starts my modem and lights up a USB TV tuner I have connected) 2. Switch PC on 3. Select Ubuntu (its a dual boot) and get the hanging problem 4. Power down the PC (holding the PC power switch) 5. Switch PC on again 6. Select Ubuntu and get the 'ACPI PCC Probe failed' message and the PC boots 7. After this I can 'shutdown' or 'restart' with no more problems Another item of interest is that it worked OK if I start up Windows first and then restart - I think. I'll confirm this tomorrow as I've done so many combinations now I'm a little hazy on that one. Regards Tony On 04/08/15 02:33, Joseph Salisbury wrote: > Will the system boot if you select the previous kernel from the GRUB > menu? > > ** Changed in: linux (Ubuntu) > Importance: Undecided => High > > ** Tags added: kernel-da-key > -- 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/1480642 Title: systemd-boot Status in linux package in Ubuntu: Incomplete Bug description: Following advice as per Release Notes (https://wiki.ubuntu.com/VividVervet/ReleaseNotes) Just upgraded from 14.10 to 15.04 and now Ubuntu fails to start from powering up. I select 'ubuntu' on the grub loader screen and then get a blank screen. Computer just hangs. Have tried Ctrl + Alt + 1 etc, and also leaving for several minutes but nothing happens. Once I power down manually and restart and try again I see a message 'ACPI PCC Probe failed, starting version 219' and PC boots OK. This has repeated each time from scratch. FYI lsb_release -rd RegardsDescription: Ubuntu 15.04 Release: 15.04 --- ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tony 1694 F.... pulseaudio /dev/snd/controlC1: tony 1694 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.04 HibernationDevice: RESUME=UUID=ecd554d6-6ffc-440b-b184-bfa1268799bf InstallationDate: Installed on 2014-08-23 (346 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. Studio XPS 435MT Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=ef670394-9aa8-4c94-8054-cd701afb0a66 ro quiet splash ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2 RelatedPackageVersions: linux-restricted-modules-3.19.0-25-generic N/A linux-backports-modules-3.19.0-25-generic N/A linux-firmware 1.143.2 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: vivid Uname: Linux 3.19.0-25-generic x86_64 UpgradeStatus: Upgraded to vivid on 2015-07-22 (13 days ago) UserGroups: adm cdrom dip lpadmin mythtv plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/19/2009 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.0.8 dmi.board.name: 0R849J dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.0.8:bd01/19/2009:svnDellInc.:pnStudioXPS435MT:pvr:rvnDellInc.:rn0R849J:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.name: Studio XPS 435MT dmi.sys.vendor: Dell Inc. --- ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tony 1694 F.... pulseaudio /dev/snd/controlC1: tony 1694 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.04 HibernationDevice: RESUME=UUID=ecd554d6-6ffc-440b-b184-bfa1268799bf InstallationDate: Installed on 2014-08-23 (346 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. Studio XPS 435MT Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=ef670394-9aa8-4c94-8054-cd701afb0a66 ro quiet splash ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2 RelatedPackageVersions: linux-restricted-modules-3.19.0-25-generic N/A linux-backports-modules-3.19.0-25-generic N/A linux-firmware 1.143.2 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: vivid Uname: Linux 3.19.0-25-generic x86_64 UpgradeStatus: Upgraded to vivid on 2015-07-22 (13 days ago) UserGroups: adm cdrom dip lpadmin mythtv plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/19/2009 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.0.8 dmi.board.name: 0R849J dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.0.8:bd01/19/2009:svnDellInc.:pnStudioXPS435MT:pvr:rvnDellInc.:rn0R849J:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.name: Studio XPS 435MT dmi.sys.vendor: Dell Inc. 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