Public bug reported:
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.
** Affects: nvidia-graphics-drivers-440 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1857271
Title:
Focal 440.44-0ubuntu1 PRIME Sync not working
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