Hello, Sorry I had to leave this for a few days ... Anyway I believe I have discovered where the problem lies. First things first, booting with kernel '3.16.0-43-generic' works OK.
The other thing I discovered (latest kernel) is that if my TV tuner is active the system won't boot. The light on the tuner goes out after the boot starts and the system hangs. When I power down and restart the light is out and will come on again after I see the 'ACPI PCC Probe failed starting version 219' and the system boots. If I disconnect the tuner from scratch before switching on the system boots OK with the latest kernel. This also explains why I noticed that it would boot OK after using Windows first as it switches the tuner off on shutdown / restart. So it looks like the problem is with the TV tuner or the driver more likely, but only with the latest kernel. Its a fairly old tuner - DVICO usb (AU version) - and all I did to install it was to download "http://www.linuxtv.org/downloads/firmware/dvb-usb-bluebird-01.fw" and copy to /lib/firmware. I use MeTV. Hopefully this helps. Again, any advice / tips much appreciated. 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: Confirmed 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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