Oops - titled wrong, breaks on the 5.4.0-9 kernel
As far as other bug - if that would suggest this would work on earlier driver,
no such luck.
Did as fresh install updated, used the 435 driver.
Same result, prime sync works on the 5.3.x kernel, fails on the current 5.4.x
kernel
** Summary changed:
- Prime Synchronizationbreaks on kernel 5.3.0-24
+ Prime Synchronizationbreaks on kernel 5.4.0-9
** Changed in: nvidia-graphics-drivers-440 (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1859357
Title:
Prime Synchronizationbreaks on kernel 5.4.0-9
Status in linux package in Ubuntu:
Incomplete
Status in nvidia-graphics-drivers-440 package in Ubuntu:
New
Bug description:
Test case:
Optimus hardware
20.04 updated
Install 440 driver
Enable nvidia_drm modeset either thru kernel parameter or a modeprobe.d file.
reboot.
Seen here -
uname -a && xrandr --verbose |grep PRIME && sudo cat
/sys/module/nvidia_drm/parameters/modeset
Linux doug-Lenovo-IdeaPad-Y510P 5.4.0-9-generic #12-Ubuntu SMP Mon Dec 16
22:34:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
PRIME Synchronization: 0
PRIME Synchronization: 1
PRIME Synchronization: 1
[sudo] password for doug:
Y
While same machine, ect. while booting to previous 5.3.0-24 kernel
uname -a && xrandr --verbose |grep PRIME && sudo cat
/sys/module/nvidia_drm/parameters/modeset
Linux doug-Lenovo-IdeaPad-Y510P 5.3.0-24-generic #26-Ubuntu SMP Thu Nov 14
01:33:18 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
PRIME Synchronization: 1
PRIME Synchronization: 1
PRIME Synchronization: 1
[sudo] password for doug:
Y
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nvidia-driver-440 440.44-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
Uname: Linux 5.4.0-9-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu15
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Sun Jan 12 14:55:34 2020
InstallationDate: Installed on 2019-12-18 (25 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20191217)
SourcePackage: nvidia-graphics-drivers-440
UpgradeStatus: No upgrade log present (probably fresh install)
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