** Also affects: ubuntu-drivers-common (Ubuntu)
Importance: Undecided
Status: New
** Also affects: nvidia-prime (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1879287
Title:
[nvidia+amdgpu] System sometimes starts with a black screen with
Nvidia PRIME setup on Ryzen+Nvidia system (but kernel 5.6.14 works
perfectly)
Status in linux package in Ubuntu:
Incomplete
Status in nvidia-prime package in Ubuntu:
New
Status in ubuntu-drivers-common package in Ubuntu:
New
Bug description:
I've recently installed Ubuntu on a laptop that has a Ryzen APU (with
Vega 8 integrated graphics) and a Nvidia dedicated GPU. The first
issue that this kind of setup gives on a fresh install is that that
PRIME render offloading doesn't work, I presume that Ubuntu currently
sets up hybrid graphics for laptop with Intel+Nvidia, not AMD+Nvidia
but that's another separate issue. As a workaround I created an Xorg
configuration (attached in this report) that sets up both GPUs (with
the appropiate BusIDs), after such configuration is applied the system
boots fine with AMD integrated graphics being used and the ability to
switch to Nvidia with PRIME render off-loading.
The problem comes when I try to use the computer the next day, then it
gives me a black screen without having the ability to switch to a tty,
the boot log doesn't throw any errors I just see a black screen after
Xorg tries to start. I can make it work again by entering in recovery
mode, logging into a root console and switching between "nvidia" and
"on-demand" modes using prime-select (I set it up to "on-demand"
profile after installing Ubuntu).
For the moment I cannot provide any relevant logs since it's now
working fine (and I don't remember seeing any errors on Xorg logs),
also I don't really know where to look for this kind of issues.
My system information:
-CPU: AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx
-GPU: Nvidia GTX 1650 Mobile (TU117M) (Using Nvidia binary driver version
440.64 from https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa)
-RAM: 8 GB
-Kubuntu 20.04 LTS (Using KDE Plasma 5.18.4)
-Xorg 1.20.8-2ubuntu2
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