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[Bug 1528300] Re: Stuck on login screen after updating to 3.19.0-42


Ok, I updated the BIOS to F9 and confirmed with the commands above:


Now nothing other than windows worked. I eventually figured out the BIOS updates reset the BIOS settings, which included enabling the Intel HD Graphics on the processor - which seems to confuse the hell out of ubuntu. After disabling that and playing with the display drivers I'm able to boot with the 42 kernel now. For some reason only the nouveau driver works, using the nvidia driver will give the initial symptoms still: instead of booting to desktop, you get the login screen, but it's not possible to login with any account, you just get returned to the login screen - probably a failure of the desktop system to start.

The nouveau driver used to (with kernel 41) cause me issues where it
would boot to a black screen roughly 3/4 times. Persistently rebooting
would eventually work. I hope that is not still the case, but it's too
early to say.

I've disabled all updates and I'm going to try to limp along until the
next time I upgrade my OS, I'll give a debian a try this time, maybe it
will be more stable.

Thanks for your help.

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  Stuck on login screen after updating to 3.19.0-42

Status in linux package in Ubuntu:

Bug description:
  Entering the correct password does not login (entering bad password
  does give a bad password error, this is distinct), trying to start a
  guest session also fails. Rebooting and choosing the previous
  3.19.0-41 kernel works fine. This bug report is sent after booting
  from *-41.

  I have the proprietary Nvidia drivers installed, the recommended
  version 352.63 from the additional drivers tab. The nouveau drivers do
  not work with my Nvidia 970 system, they cause me to sometimes get a
  black screen instead of booting into the OS, also with the install
  disk, and even with other linux distros. The proprietary drivers fix
  that issue for me, regardless of distro.

  I'll keep the "buggy" kernel version around for now in case I can help
  debug this issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-41-generic 3.19.0-41.46~14.04.2
  ProcVersionSignature: Ubuntu 3.19.0-41.46~14.04.2-generic 3.19.8-ckt10
  Uname: Linux 3.19.0-41-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Dec 21 11:22:08 2015
  InstallationDate: Installed on 2015-12-16 (5 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  SourcePackage: linux-lts-vivid
  UpgradeStatus: No upgrade log present (probably fresh install)
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
   /dev/snd/controlC2:  eloff      1560 F.... pulseaudio
   /dev/snd/controlC1:  eloff      1560 F.... pulseaudio
   /dev/snd/controlC0:  eloff      1560 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  InstallationDate: Installed on 2015-12-16 (14 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
   eth0      no wireless extensions.
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. Z87X-UD3H
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-41-generic.efi.signed root=UUID=b8d21e89-9f7d-45ac-838e-0483c4ae55ad ro quiet splash hugepagesz=1G hugepages=8 hugepagesz=2M hugepages=2048 vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-41.46~14.04.2-generic 3.19.8-ckt10
   linux-restricted-modules-3.19.0-41-generic N/A
   linux-backports-modules-3.19.0-41-generic  N/A
   linux-firmware                             1.127.19
  Tags:  trusty
  Uname: Linux 3.19.0-41-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 08/03/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F7
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z87X-UD3H-CF
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd08/03/2013:svnGigabyteTechnologyCo.,Ltd.:pnZ87X-UD3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87X-UD3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: Z87X-UD3H
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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