Stuck on login screen after updating to 3.19.0-42

[Daniel Eloff]

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
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /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)
IwConfig:
 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
RelatedPackageVersions:
 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
RfKill:

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.

[penalvch (penalvch)]

Daniel Eloff, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1528300

[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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[Daniel Eloff (dan-eloff)]

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

F9
03/18/2014

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.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[penalvch (penalvch)]

Daniel Eloff, to follow up, is this still an issue?