Not an issue here on my optimus laptop (slightly aged as latest laptop
is nvidia only
$ uname -a && xrandr --verbose |grep PRIME && sudo cat
/sys/module/nvidia_drm/parameters/modeset
Linux doug-Lenovo-IdeaPad-Y510P 5.4.0-48-generic #52~18.04.1-Ubuntu SMP Thu Sep
10 12:50:22 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
PRIME Synchronization: 1
PRIME Synchronization: 1
PRIME Synchronization: 1
Y
$ inxi -CG
CPU: Quad core Intel Core i7-4700MQ (-MT-MCP-) cache: 6144 KB
clock speeds: max: 3400 MHz 1: 1381 MHz 2: 1736 MHz 3: 1339 MHz 4:
1811 MHz 5: 1336 MHz 6: 1453 MHz
7: 1588 MHz 8: 1503 MHz
Graphics: Card-1: Intel 4th Gen Core Processor Integrated Graphics Controller
Card-2: NVIDIA GK107M [GeForce GT 755M]
Display Server: x11 (X.Org 1.20.8 ) drivers: modesetting,nvidia
(unloaded: fbdev,vesa,nouveau)
Resolution: 1920x1080@59.91hz
OpenGL: renderer: GeForce GT 755M/PCIe/SSE2 version: 4.6.0 NVIDIA
450.57
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to nvidia-graphics-drivers-390 in Ubuntu.
https://bugs.launchpad.net/bugs/1857271
Title:
Focal PRIME Synchronization still not working (450.x)
Status in nvidia-graphics-drivers-390 package in Ubuntu:
Confirmed
Status in nvidia-graphics-drivers-435 package in Ubuntu:
Confirmed
Status in nvidia-graphics-drivers-440 package in Ubuntu:
Confirmed
Status in nvidia-graphics-drivers-450 package in Ubuntu:
New
Bug description:
Ubuntu 19.04 (Disco)
Linux 5.4.6-050406-generic
linux-firmware-1.184
mutter-3.32.2+git20190711-2ubuntu1~19.04.1
nvidia-driver-440:
Installed: 440.44-0ubuntu1
Candidate: 440.44-0ubuntu1
Version table:
*** 440.44-0ubuntu1 500
500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu focal/main
amd64 Packages
100 /var/lib/dpkg/status
I've noticed screen tearing with the nvidia 440 driver on 5.4.x
kernels. Typically, this is resolved by setting the xrandr option
'PRIME Synchronization' to '1', however, doing so with the above
combination results in never being enabled.
$ xrandr --output eDP-1-1 --set 'PRIME Synchronization' '1'
$ xrandr --verbose | grep PRIME
PRIME Synchronization: 0
PRIME Synchronization: 1
PRIME Synchronization: 1
PRIME Synchronization: 1
Reverting to Linux 5.0.0-37-generic resolve the issue, so I figured
I'd raise it here first, however, it seems like a potential kernel
regression issue if the only thing I'm changing is indeed the kernel
version. Your input would be appreciated. I tried to figure out how to
post a bug on the PPA, however, it seems bug creation is disabled on
that PPA, so I ended up here.
I've been testing newer kernel versions to get fixes for other
problems with my hardware. Due to another package dependency, I'm
stuck on disco for some pulseaudio bluetooth codec support, so I've
been pushing forward the kernel, firmware and nvidia driver versions
to get the other driver fixes. I realise this is not ideal.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1857271/+subscriptions
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