nvidia card disabled after upgrading to 5.0.0-11-generic

[Martin Vysny]

After upgrading from 5.0.0.8-generic to 5.0.0.11-generic, the nvidia card suddenly became "disabled". I own a laptop with hybrid GPU stack, intel + nvidia; nvidia is in charge of display ports. On 5.0.0.8-generic I had only nvidia GPU enabled (discrete mode) and nouveau was able to properly control nvidia and send the signal to my monitor. In hybrid mode this worked as well properly.

On 5.0.0.11-generic in discrete mode, linux booted to 640x480 resolution only. When I enabled hybrid mode back, the computer boots into 1920x1200 mode properly, however the display port ports don't work at all, and the "About" screen only lists the Intel GPU, not nvidia. lspci still lists nvidia though.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-5.0.0-11-generic 5.0.0-11.12
ProcVersionSignature: Ubuntu 5.0.0-11.12-generic 5.0.6
Uname: Linux 5.0.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mavi 2324 F.... pulseaudio
 /dev/snd/controlC1: mavi 2324 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 13 20:09:25 2019
HibernationDevice: RESUME=/dev/mapper/vg0-lv0--swap
InstallationDate: Installed on 2016-09-05 (950 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 20EN0005MS
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-11-generic root=/dev/mapper/vg0-lv1--root ro splash ipv6.disable=1 vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-5.0.0-11-generic N/A
 linux-backports-modules-5.0.0-11-generic N/A
 linux-firmware 1.178
SourcePackage: linux
UpgradeStatus: Upgraded to disco on 2019-03-12 (32 days ago)
dmi.bios.date: 02/21/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: N1EET83W (1.56 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20EN0005MS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1EET83W(1.56):bd02/21/2019:svnLENOVO:pn20EN0005MS:pvrThinkPadP50:rvnLENOVO:rn20EN0005MS:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P50
dmi.product.name: 20EN0005MS
dmi.product.sku: LENOVO_MT_20EN_BU_Think_FM_ThinkPad P50
dmi.product.version: ThinkPad P50
dmi.sys.vendor: LENOVO

[Martin Vysny (vyzivus)]

Just rebooted to 5.0.0-8, to rule out hardware failure. Under 5.0.0-8 nouveau+nvidia works flawlessly, under 5.0.0-11 nvidia card seem to be completely ignored by Linux, both in "hybrid" and "discrete" laptop mode.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Martin Vysny (vyzivus)]

I have just upgraded to 5.0.0-11 on my other laptop also with hybrid Intel+Nvidia GPU stack (a different Nvidia GPU though) - the same thing happened, Linux+nouveau completely ignores the nvidia GPU.

[Mario Di Nicola (warp99)]

I have a similar problem with an Nvidia GeForce GT 730 card and the Nouveau drivers. On kernel 5.0.0-8 everything is normal with a quick boot time and the correct resolution of 1920x1080, however on 5.0.0-11 the system is very slow to boot and 1024x768 is the only resolution I have.

[Mario Di Nicola (warp99)]

I believe I found the answer according to this post:

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1824677/comments/3

Settings nouveau.modeset=1 on the kernel options in grub solved the issue for me.

[Martin Vysny (vyzivus)]

You're right, thank you very much for pointing that out! Adding nouveau.modeset=1 fixed things for me as well. This bug can be closed as a duplicite of https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1824677