Cannot get past login after update to 4.4.0.75-generic

[Ben Langmuir]

After running software update on 16.04 and rebooting, I cannot get past the login screen. The screen appears the wrong resolution and squashed smaller than the screen with a black border. When I login, it accepts the password, but after a few seconds the screen gets corrupted then resets back to the login screen.

Rebooting to an older kernel fixed the issue.

Working:
 4.4.0-72-generic

Failed:
 4.4.0.75-generic

I'm using nvidia 340.102

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-72-generic 4.4.0-72.93
ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
Uname: Linux 4.4.0-72-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: ben 2228 F.... pulseaudio
 /dev/snd/controlC1: ben 2228 F.... pulseaudio
 /dev/snd/controlC0: ben 2228 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 25 23:46:40 2017
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=a1a4d11a-a791-49f3-9542-90dbd821d0d2
InstallationDate: Installed on 2012-04-28 (1823 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-72-generic root=UUID=7d577aa7-441e-43e2-b6b3-a8500fe017c9 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-72-generic N/A
 linux-backports-modules-4.4.0-72-generic N/A
 linux-firmware 1.157.8
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2017-03-27 (30 days ago)
dmi.bios.date: 04/21/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.40
dmi.board.name: X58 Extreme
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.40:bd04/21/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX58Extreme:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream stable kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.4 stable kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.63

[Ben Langmuir (benlangmuir)]

Okay I was able to fix this. I tried updating to nvidia-375 in case that was the issue, and during the install I noticed it was compiling something with clang instead of gcc. After that I was getting the same behaviour from both 4.4.0-72 and 4.4.0-75.

I think what happened was:
1. I did update-alternatives to switch cc/c++ to clang
2. I updated my kernel, which rebuilt part of nvidia's driver with clang
3. Broken.

I fixed it by doing:
1. apt-get-purge nvidia-*
2. update-alternatives back to gcc
3. re-install nvidia-375

I'm now using nvidia-375 with kernel 4.4.0-75.

[Kai-Heng Feng (kaihengfeng)]

Sounds like maintainer scripts in Nvidia need some tweaks.