"nvidia on-demand" mode does not support external displays
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
nvidia-graphics-drivers (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
nvidia-graphics-drivers-435 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
In a recent driver, Nvidia finally added Linux support for render offload, where most graphics are rendered on the CPU-onboard GPU and only certain applications are rendered on the discrete Nvidia GPU. I know that Ubuntu 19.10 started shipping some updated Xorg packages to support this. For the most part the mode seems to work great.
On my laptop, however, I have found that the "on demand" mode does not detect external monitors (and the monitor says it is not receiving a signal). Switching to "Nvidia" mode, where everything is rendered on the discrete GPU, makes the external displays work. The laptop is a Lenovo Thinkpad X1 Extreme (Gen 1). I have found this occurs both with nvidia-
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: nvidia-driver-435 435.21-0ubuntu2
ProcVersionSign
Uname: Linux 5.3.0-19-generic x86_64
NonfreeKernelMo
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 21 13:17:38 2019
InstallationDate: Installed on 2019-09-04 (47 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: nvidia-
UpgradeStatus: Upgraded to eoan on 2019-10-21 (0 days ago)
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
DistroRelease: Ubuntu 19.10
InstallationDate: Installed on 2019-09-04 (47 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
NonfreeKernelMo
Package: nvidia-driver-435 435.21-0ubuntu2
PackageArchitec
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
Tags: eoan third-party-
Uname: Linux 5.3.0-19-generic x86_64
UpgradeStatus: Upgraded to eoan on 2019-10-21 (0 days ago)
UserGroups:
_MarkForUpload: True
apport information